JP4122262B2 - Divider ratio output device for frequency divider - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a frequency division ratio output device for a frequency divider.
[0002]
[Prior art]
The frequency divider divides the frequency of the input signal and generates an output signal having a frequency obtained by reducing the frequency of the input signal. However, the frequency division ratio is not limited to an integer and may be set to a value up to the decimal point. The present applicant has also proposed the technique described in Patent Document 1.
[0003]
[Patent Document 1]
Japanese Patent No. 2821982
[0004]
In the technique described in Patent Document 1, the reference value for calculating the frequency division ratio is small When set to a value up to several places, n is the integer part of the value. small Assuming that the number part is x, a total of 10 integer values consisting of (10−x) integer values n and x integer values (n + 1) are randomly stored in the memory and sequentially output. The value obtained by adding the predetermined number of times was set small It is configured to have a frequency division ratio of up to several places.
[0005]
[Problems to be solved by the invention]
As described above, in the frequency division ratio output device of the frequency divider according to the related art, since it is necessary to calculate two different integers as random numbers each time a reference value is set, there is a disadvantage that the configuration becomes complicated. It was.
[0006]
The object of the present invention is to solve the above inconvenience and to have a simple configuration, small Provided is a frequency division ratio output device for a frequency divider that accurately outputs a frequency division ratio of several points or less and that obtains the desired detection accuracy by dividing the input signal by the output frequency division ratio. There is.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, in claim 1, in the apparatus for outputting a frequency division ratio of a frequency divider that generates an output signal having a reduced frequency by dividing the frequency of the input signal, A reference value setting means for setting a reference value for calculating the division ratio to a value up to n decimal places; Every time the division ratio is output A dividing unit for dividing the set reference value into an integer part and the n-th decimal and outputting the divided value; Every time the division ratio is output The output small Enter a number To the decimal number entered last time Add, and when the added decimal number is greater than or equal to integer m, output as integer m Decimal Adding means, and Every time the division ratio is output Input the value of the output integer part, and small When the integer m is output from the number adding means, the integer m is added to the value of the input integer part, small When the integer m is not output from the number adding means, output means for outputting the input integer part value as it is is provided, and the output signal is divided by using the output value as the division ratio. Configure to occur The reference value setting means corrects the set reference value in accordance with the operating environment of the device that generates the input signal, and the device is used to divide the speedometer signal indicating the traveling speed of the vehicle. Configure It was.
[0008]
Set the reference value for calculating the division ratio to a value up to n decimal places, Every time the division ratio is output The set reference value is divided into an integer part and an n-th decimal and output. small Enter a number To the decimal number entered last time When the added decimal number becomes a value greater than or equal to integer m, it is output as integer m, the value of the output integer part is input, and when integer m is output, the integer part where integer m is input On the other hand, when the integer m is not output, the input integer value is output as it is, and the input signal is divided using the output value as a division ratio to generate an output signal. So while having a simple configuration, small A frequency division ratio of several points or less can be output accurately, and the expected detection accuracy can be obtained by dividing the input signal by the output frequency division ratio. Thereby, for example, even when the generation interval of the input signal that has a large influence on the detection accuracy of the frequency division ratio is long, the error can be minimized and the desired detection accuracy can be obtained.
[0009]
3. The apparatus for outputting a frequency division ratio of a frequency divider that generates an output signal having a reduced frequency by dividing the frequency of an input signal, and a reference for calculating the frequency division ratio A reference value setting means for setting the value to a value up to n decimal places, Every time the division ratio is output An integerizing means for multiplying the set reference value by 10 to the power of n, and Every time the division ratio is output, The integer value To the previous value Both the value obtained by addition and the previous addition value are divided by the 10 nth power, and output means for outputting the difference is provided. The output signal is used as the frequency dividing ratio to obtain the input signal. The output signal is generated by dividing the frequency. The reference value setting means corrects the set reference value in accordance with the operating environment of the device that generates the input signal, and the device is used to divide the speedometer signal indicating the traveling speed of the vehicle. Configure It was.
[0010]
Similarly, Every time the division ratio is output The set reference value is multiplied by 10 to the power of n to make an integer, and the integer value is To the previous value Divide both the value obtained by addition and the previous addition value by the power of 10 n, and output the difference, and divide the input signal using the output value as the division ratio to generate the output signal. Because it was configured to do, while it is a simple configuration, small A frequency division ratio of several points or less can be output accurately, and the expected detection accuracy can be obtained by dividing the input signal by the output frequency division ratio. Thereby, for example, even when the generation interval of the input signal that has a large influence on the detection accuracy of the frequency division ratio is long, the error can be minimized and the desired detection accuracy can be obtained.
[0011]
4. The apparatus for outputting a frequency division ratio of a frequency divider that generates an output signal having a reduced frequency by dividing the frequency of an input signal, and a reference for calculating the frequency division ratio A reference value setting means for setting a value to a value up to n decimal places, Every time the division ratio is output An integerizing means for multiplying the set reference value by 10 to the power of n, and Every time the division ratio is output The remainder obtained by dividing the previous integer value by the 10 nth power is added to the integer value, and the obtained sum is divided by the 10 n power, and the resulting quotient is output. Output means, and configured to generate the output signal by dividing the input signal using the output value as the division ratio. The reference value setting means corrects the set reference value according to the operating environment of the device that generates the input signal, and the device is used for frequency division of a speedometer signal indicating the traveling speed of the vehicle. Configure It was.
[0012]
Similarly, Every time the division ratio is output The set reference value is multiplied to the nth power of 10 to make an integer, and the remainder obtained by dividing the previous integerized value by the 10th power of n is added to the integerized value. Dividing by 10 to the power of n, the resulting quotient is output, and the output value is divided by using the output value as the frequency division ratio to generate the output signal. small A frequency division ratio of several points or less can be output accurately, and the expected detection accuracy can be obtained by dividing the input signal by the output frequency division ratio. Thereby, for example, even when the generation interval of the input signal that has a large influence on the detection accuracy of the frequency division ratio is long, the error can be minimized and the desired detection accuracy can be obtained.
[0013]
According to a fourth aspect of the present invention, the output of the output means is obtained in advance for a predetermined number of times and sequentially output.
[0014]
Since it is configured to obtain the output of the output means a predetermined number of times in advance and sequentially output it, the configuration can be further simplified in addition to the effects described above.
[0016]
If it adds about the effect of the invention which concerns on Claims 1-3, Since the reference value set according to the operating environment of the device that generates the input signal is corrected, the generation interval of the input signal is long in the device that generates the input signal, such as a rotation sensor. When the operating environment or operating condition has a large effect on the detection accuracy of the ratio, the error can be minimized by appropriately correcting the reference value for calculating the division ratio. Accuracy can be obtained.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
A frequency division ratio output device for a frequency divider according to one embodiment of the present invention will be described below with reference to the accompanying drawings.
[0018]
FIG. 1 is a schematic diagram showing an overall configuration of a frequency division ratio output apparatus for a frequency divider according to the embodiment.
[0019]
In the figure, reference numeral 10 denotes a frequency division ratio output device for a frequency divider that generates an output signal having a reduced frequency by dividing the frequency of the input signal. The device 10 is specifically composed of a microcomputer, and the reference value for calculating the frequency division ratio is the nth decimal place, more specifically 65.6, etc. small A reference value setter (reference value setting means) 12 for setting values up to several places, an integerizer 14 for converting the set reference value into an integer and outputting it as a division ratio, and a device for generating an input signal And an operating environment detector 16 for detecting the operating environment or operating state.
[0020]
Hereinafter, the configuration of the frequency division ratio output device 10 will be described by taking as an example the case of dividing a signal of a speedometer (not shown) indicating the traveling speed (wheel speed) of the vehicle.
[0021]
As shown in the figure, a pulsar 20 is arranged in the vicinity of a differential gear (not shown) of the vehicle 18 schematically shown, and a rotation sensor (input signal generating device) 22 comprising an electromagnetic pickup is located at a position opposite to the pulsar 20. Be placed. The pulser 20 has a number of teeth of about 40 to 50, and the rotation sensor 22 outputs a rectangular wave signal composed of a number of pulses corresponding to the number of teeth per rotation of the differential gear.
[0022]
The output rectangular wave signal is input to the waveform shaper 24 and is subjected to waveform shaping. The waveform-shaped sensor output (pulse) is then input to the pulse counter 26, where the pulses are counted. Thus, the obtained count value is input to the comparator 30 where it is compared with the output of the integerizer 14. In this embodiment, the reference value is 65.6, for example. small Although it is set to a value including a number, the integer number generator 14 outputs the reference value as a frequency division ratio consisting of an integer of 65 or 66 as will be described later.
[0023]
The comparator 30 compares the input count value and its integer (frequency division ratio), and when they match, an output is generated and sent to the PWM output circuit 32. That is, the comparator 30 outputs an output (for example, a pulse) whenever the number of input pulses reaches 65 or 66. The output is sent to the PWM output circuit 32. The PWM output circuit generates and outputs a PWM (pulse width modulation) signal to the drive circuit of the needle (not shown) of the speedometer (analog meter) based on the comparator output. And drive the needle. In this embodiment, the frequency divider includes a frequency division ratio output device 10, a rotation sensor 22, a pulse counter 26, a comparator 30, and the like.
[0024]
Here, a tire pressure sensor 36 is disposed on the tire 34 of the vehicle 18 to output a signal indicating the air pressure filled in the tire, and a stroke sensor 40 is disposed near the suspension (not shown). A signal corresponding to the displacement of the suspension, more specifically, the vehicle load (including the load by the occupant) is output (the tire pressure sensor 36 and the stroke sensor 40 are shown only for one of the front wheels). Further, an outside air temperature sensor 42 is disposed at an appropriate position in an engine room (not shown) of the vehicle 18 and outputs a signal proportional to the outside air temperature.
[0025]
The outputs of these sensor groups are input to the operating environment detector 16. The output of the PWM output circuit 32 is also input to the operating environment detector 16. The operating environment detector 16 detects air pressure (tire pressure), load (loading load), and outside air temperature from the output of the sensor group, and counts the output of the PWM output circuit 32 to detect wheel speed (vehicle speed).
[0026]
These detected values are values indicating the operating environment or operating state of the device that generates the input signal, that is, the rotation sensor 22. These detected values are sent to the reference value setter 12, as shown in FIG.
[0027]
The reference value setter 12 has a frequency division ratio of 65.6 or the like as described above so that the desired detection accuracy can be obtained in accordance with the regulations of the law relating to the detection or display of the wheel speed (vehicle speed). small Set the value up to several places. The lower the wheel speed, the longer the input signal interval and the greater the influence of the frequency division ratio on the detection accuracy. Also, the amount of deformation of the tire varies depending on the air pressure (tire pressure) or the load load and the outside temperature. The frequency division ratio set in accordance with the detected values is appropriately increased and decreased for correction. The setting and correction of the reference value are performed a predetermined number of times (10 times) or every predetermined time.
[0028]
Next, the configuration of the integerizer 14 will be described. The integerizer 14 is functionally shown as shown.
[0029]
The integer generator 14 converts the reference value set to 65.6 to the integer part 65 and small An integer that is divided into 0.6, which is the first place (nth place) small Number divider (dividing means) 14a, output small The number 0.6 is input and added, and when the added decimal number is a value greater than or equal to the integer m, specifically 1 or greater, a fractional part adder (adding means) 14b that outputs as 1 (integer m) , Input the value 65 of the output integer part, small When 1 (integer m) is output from the number part adder 14b, 1 (integer m) is added to the input integer part value 65, while 1 (integer m) is not output from the decimal part adder 14b. Includes a frequency division ratio adder (output means) 14c that outputs the input integer value 65 as it is.
[0030]
The value obtained by adding the outputs of the frequency division ratio adder 14c at a predetermined number (10 times) is as described above. small It becomes equal to the value 65.6 up to the first place (n-th place). The frequency divider divides the input signal from the rotation sensor 22 using the output value as a frequency division ratio to generate an output signal and outputs it to the PWM output circuit.
[0031]
FIG. 2 shows the integer generator 14 with small FIG. 3 is an explanatory diagram showing the operation (calculation) of the number part adder 14b and the division ratio adder 14c. FIG. 3 shows the values output from the integerizer 14 (specifically, the division ratio adder 14c). It is explanatory drawing which shows (frequency division ratio) over predetermined times (10 times). still, small The output of the number adder 14b is indicated as SUMMOD, the output of the frequency division ratio adder 14c is indicated as #FBKVSP, and the number of times is indicated as i. In FIG. small The first place of several points is indicated as “, 10”.
[0032]
With this configuration, as shown in FIG. 3, when n = 1, the value (frequency division ratio) output from the integer unit 14 is 10 n times, that is, 66 out of 10 out of 6 times. Since the number of times 65 is 4 times, the sum of the 10 frequency division ratios is 65.6. As a result, the division ratio up to the first decimal place can be output accurately, and the desired accuracy can be obtained even when the input signal generation interval such as the low wheel speed is long. Also, the configuration is simple.
[0033]
In this embodiment, small We set the frequency division ratio up to several points, i.e. small When setting the frequency division ratio up to 2nd place as several nth place, small It is only necessary to add up to several two-digit values and output when the value becomes 1. Therefore, the number of times corresponding to 10 to the nth power (n = 2) times, that is, the output of 100 times is added up. , small Dividing ratios up to several places can be output.
[0034]
The same applies when n is 3 or more. Further, although the integer m is set to 1, it may be 2 or more as long as the value of the predetermined number of times is appropriately changed.
[0035]
Further, since the value of the division ratio to be set is corrected in accordance with the operating environment or operating state of the rotation sensor 22, the operating environment or operating state, that is, wheel speed (vehicle speed), air pressure (tire pressure), The frequency division ratio set by the frequency division ratio setting device 12 can be appropriately corrected according to the load (loading load) and the outside air temperature, and the detection accuracy, particularly at low wheel speeds with long input signal intervals, is further improved. Can be improved.
[0036]
FIG. 4 is a schematic diagram partially showing a frequency division ratio output device for a frequency divider according to the second embodiment of the present invention, which is partially similar to FIG. 1, and FIG. It is explanatory drawing similar to FIG. 2 which shows a calculation.
[0037]
In the apparatus according to the second embodiment, the integerizer 14 is a multiplier (integerization means) 14d that multiplies the set reference value 65.6 to the nth power of 10 to produce an integer 656, and outputs the integer. An adder 14e that adds the normalized value 656, a divider 14f that divides both the sum (SUMMOD) obtained by addition and the previous addition value by the 10th power of n, and calculates the difference between them A subtractor (output means) 14g for outputting (#FBKVSP) is provided, and the value obtained by adding up the outputs of the subtractor 14g in a predetermined number of times (10 times) small It was set to be equal to the value 65.6 up to several first place (nth place). The frequency divider divides the input signal from the rotation sensor 22 using the output value as a frequency division ratio to generate an output signal and outputs it to the PWM output circuit. The remaining configuration is the same as that of the first embodiment.
[0038]
With this configuration, as shown in FIG. 5, the sum of the 10 division ratios results in 65.6. As in the first embodiment, the division ratios up to the first decimal place are accurately output. The desired accuracy can be obtained even at low wheel speeds. Also, the configuration is simple. still, small Similarly to the first embodiment, even in the case of several points n (n ≧ 2), the expected frequency division ratio can be output by adding 10 n (n ≧ 2) outputs.
[0039]
FIG. 6 is a schematic diagram partially showing a frequency division ratio output device for a frequency divider according to a third embodiment of the present invention, which is partially similar to FIG. 1, and FIG. It is explanatory drawing similar to FIG. 2 which shows a calculation.
[0040]
In the apparatus according to the third embodiment, the integerizer 14 includes a multiplier 14h (integerization means) that multiplies the set reference value 65.6 by multiplying it by 10 to the power of n, and an integer. An adder 14i for adding the remainder when the previous integer value is divided by the 10 nth power to the value, a multiplier for dividing the obtained sum by the 10 n power and outputting the obtained quotient 14j (output means), and the value obtained by adding up the outputs of the divider 14j for a predetermined number of times (10 times) is as described above. small It was set to be equal to the value 65.6 up to several first place (nth place). The frequency divider divides the input signal from the rotation sensor 22 using the output value as a frequency division ratio to generate an output signal and outputs it to the PWM output circuit. The remaining configuration is the same as that of the first embodiment.
[0041]
With this configuration, as shown in FIG. 7, when the frequency division ratio of 10 times is added, the result is 65.6. As in the first embodiment, the frequency division ratio up to the first decimal place is accurately output. The desired accuracy can be obtained even at low wheel speeds. Also, the configuration is simple. still, small Similarly to the first embodiment, the expected frequency division ratio can be output by adding the outputs of 10 n (n ≧ 2) even in the case of several points n (n ≧ 2).
[0042]
FIG. 8 is a schematic diagram similar to FIG. 1 showing the configuration of the frequency division ratio output device for the frequency divider according to the fourth embodiment of the present invention.
[0043]
As shown in the figure, in the fourth embodiment, 1 to 10 integer generators 14 corresponding to a predetermined number are provided, and output #FBKVSP (output of the integer generator 14) at a predetermined number (10 times). Are obtained in advance and output sequentially.
[0044]
The fourth embodiment has an advantage that the configuration is simpler than the previous embodiment. In the fourth embodiment, the sensor group and the operating environment detector 16 are not shown. However, in practice, the configuration may be further simplified by removing them, or a reference value that is set to remain. May be corrected.
[0045]
In the first to fourth embodiments, as described above, a device that outputs a frequency division ratio of a frequency divider that generates a reduced frequency output signal by dividing the frequency of the input signal (frequency division ratio output device). 10, a reference value setting means (reference value setting unit 12) for setting the reference value for calculating the frequency division ratio to a value 65.6 up to the nth decimal point, Every time the division ratio is output Dividing means for dividing the set reference value into an integer part 65 and an n-th decimal number of 0.6 (an integer / number of the integer generator 14) small Number divider 14a), Every time the division ratio is output The output small Enter a number To the decimal number entered last time Add, and when the added decimal number is greater than or equal to integer m, output as integer m Decimal Adding means (of the integerizer 14 small A number adder 14b), and Every time the division ratio is output Input the value of the output integer part, and small When the integer m is output from the number adding means, the integer m is added to the value of the input integer part, small When the integer m is not output from the number adding means, output means (the division ratio adder 14c of the integer generator 14) outputs the input integer part value as it is, and the output value is divided into the frequency divider As a ratio, the input signal is divided to generate the output signal. The reference value setting means corrects the set reference value in accordance with the operating environment (or operating state) of the device (rotation sensor 22) that generates the input signal, and the device is a speed indicating the traveling speed of the vehicle. Configured to be used to divide meter signal It was.
[0046]
Further, in a device (frequency division ratio output device) 10 that outputs a frequency division ratio of a frequency divider that generates an output signal having a reduced frequency by dividing the frequency of the input signal, the frequency division ratio is calculated. A reference value setting means (reference value setting unit 12) for setting the reference value to a value up to n decimal places; Every time the division ratio is output An integerization means (multiplier 14d of the integerizer 14) for converting the set frequency dividing ratio by 10 to the power of n and converting it to an integer; and Every time the division ratio is output, The integer value To the previous value Output means for dividing both the value obtained by addition and the previous addition value by the 10th power and outputting the difference (the adder 14e, the divider 14f and the subtractor 14g of the integerizer 14) And the output signal is generated by dividing the input signal using the output value as the division ratio. The reference value setting means corrects the set reference value in accordance with the operating environment (or operating state) of the device (rotation sensor 22) that generates the input signal, and the device is a speed indicating the traveling speed of the vehicle. Configured to be used to divide meter signal It was.
[0047]
Further, in a device (frequency division ratio output device) 10 that outputs a frequency division ratio of a frequency divider that generates an output signal having a reduced frequency by dividing the frequency of the input signal, the frequency division ratio is calculated. A reference value setting means (reference value setting unit 12) for setting the reference value to a value up to n decimal places; Every time the division ratio is output An integerization means (multiplier 14h of the integerizer 14) for converting the set reference value into an integer by multiplying by 10 to the power of n, and Every time the division ratio is output The remainder obtained when the previous integer value is divided by the 10 nth power is added to the integer value, and the sum obtained is divided by the 10 n power, and the resulting quotient is output. Output means (an adder 14i and a divider 14j of the integerizer 14), and configured to divide the input signal using the output value as the division ratio to generate the output signal. The reference value setting means corrects the set reference value in accordance with the operating environment (or operating state) of the device (rotation sensor 22) that generates the input signal, and the device is a speed indicating the traveling speed of the vehicle. Configured to be used to divide meter signal It was.
[0048]
Also, the output #FBKVSP of the output means (integerizer 14 division ratio adder 14c, etc.) is obtained in advance for a predetermined number of times (10 times) and sequentially output.
[0050]
Although the present invention has been described by taking as an example the case where the output of the rotation sensor 22 is divided in a vehicle speedometer (wheel speed signal), the present invention is not limited to this, and the frequency of the periodic input signal Any divider can be used as long as it divides the frequency.
[0051]
【The invention's effect】
In claim 1, while having a simple configuration, small A frequency division ratio of several points or less can be output accurately, and the expected detection accuracy can be obtained by dividing the input signal by the output frequency division ratio. Thereby, for example, even when the generation interval of the input signal that has a large influence on the detection accuracy of the frequency division ratio is long, the error can be minimized and the desired detection accuracy can be obtained.
[0052]
In claim 2, similarly, while having a simple configuration, small A frequency division ratio of several points or less can be output accurately, and the expected detection accuracy can be obtained by dividing the input signal by the output frequency division ratio. Thereby, for example, even when the generation interval of the input signal that has a large influence on the detection accuracy of the frequency division ratio is long, the error can be minimized and the desired detection accuracy can be obtained.
[0053]
In claim 3, similarly, while having a simple configuration, small A frequency division ratio of several points or less can be output accurately, and the expected detection accuracy can be obtained by dividing the input signal by the output frequency division ratio. Thereby, for example, even when the generation interval of the input signal that has a large influence on the detection accuracy of the frequency division ratio is long, the error can be minimized and the desired detection accuracy can be obtained.
[0054]
According to the fourth aspect, in addition to the above effect, the configuration can be further simplified.
[0055]
If it adds about the effect of the invention which concerns on Claims 1-3 When the input signal generation interval is long in a device that generates an input signal, such as a rotation sensor, in other words, in an operating environment or operating condition that greatly affects the detection accuracy of the division ratio, the division ratio By appropriately correcting the reference value for calculating the error, the error can be minimized and the desired detection accuracy can be obtained.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing an overall configuration of a frequency division ratio output apparatus for a frequency divider according to one embodiment of the present invention.
2 is an integerizer (more specifically, among the devices shown in FIG. small It is explanatory drawing which shows operation | movement (calculation) of a several part adder and a division ratio adder.
FIG. 3 is an explanatory diagram illustrating a value (frequency division ratio) output from an integerizer (more specifically, frequency division ratio adder) illustrated in FIG. 2 over a predetermined number of times (10 times).
FIG. 4 is a schematic diagram partially similar to FIG. 1, showing a frequency division ratio output device for a frequency divider according to a second embodiment of the present invention;
5 is an explanatory view similar to FIG. 2, showing the operation (calculation) of the integerizer of the apparatus shown in FIG.
FIG. 6 is a schematic diagram partially similar to FIG. 1, showing a frequency division ratio output device for a frequency divider according to a third embodiment of the present invention.
7 is an explanatory view similar to FIG. 2, showing the operation (calculation) of the integerizer of the apparatus shown in FIG.
FIG. 8 is a schematic diagram similar to FIG. 1, showing a frequency division ratio output device for a frequency divider according to a fourth embodiment of the present invention.

Claims (4)

In an apparatus for outputting a frequency division ratio of a frequency divider that generates an output signal having a reduced frequency by dividing the frequency of an input signal, a reference value for calculating the frequency division ratio is set to a value up to n decimal places. reference value setting means for setting, the set reference value with the integer part and the position n of the dividing means for dividing and outputting to the decimal each for outputting the division ratio, each for outputting the division ratio enter the small number who said output adds fractional numbers previously entered, when summed fraction is a value of more than integer m, fractional addition means for outputting as an integer m, and outputs the division ratio wherein receiving the output value of the integer part for each, whereas when the integer m is output from the small number of addition means for adding to the value of the integer part obtained by the input of said integers m, from the small number adding means When the integer m is not output, the value of the input integer part is An output means for or output, the output value by dividing the input signal as the frequency division ratio and configured to generate said output signal, said reference value setting means for generating the input signal A frequency division ratio output device for a frequency divider , wherein the reference value to be set is corrected in accordance with the operating environment of the device, and the device is used for frequency division of a speedometer signal indicating the traveling speed of the vehicle. . In an apparatus for outputting a frequency division ratio of a frequency divider that generates an output signal having a reduced frequency by dividing the frequency of an input signal, a reference value for calculating the frequency division ratio is set to a value up to n decimal places. reference value setting means for setting, integer unit for integer and n th power of 10 the set reference value for each for outputting the division ratio, and each configured to output the division ratio, the integer The output value is obtained by dividing both the value obtained by adding the converted value to the previous value and the previous addition value by the nth power of 10 and outputting the difference. The input signal is divided as the division ratio to generate the output signal, and the reference value setting means corrects the set reference value according to the operating environment of the device that generates the input signal. In addition, the device is a speedometer signal indicating the traveling speed of the vehicle. Dividing ratio output device of the frequency divider, characterized in that used in the division. In an apparatus for outputting a frequency division ratio of a frequency divider that generates an output signal having a reduced frequency by dividing the frequency of an input signal, a reference value for calculating the frequency division ratio is set to a value up to n decimal places. reference value setting means for setting, the integer the set reference value for each for outputting the division ratio integer unit for integer and n th power of 10, and each configured to output the division ratio Output means for adding the remainder obtained by dividing the previously integerized value by the 10 nth power to the obtained value, dividing the obtained sum by the 10 n power, and outputting the obtained quotient And the output value is generated by dividing the input signal using the output value as the division ratio, and the reference value setting means is adapted to an operating environment of the device that generates the input signal. And correcting the reference value to be set, and the device indicates a vehicle running speed. Dividing ratio output device of the frequency divider, characterized in that used in the division of Dometa signal.   4. A frequency division ratio output device for a frequency divider according to claim 1, wherein the output means outputs the predetermined number of times in advance and sequentially outputs the output.

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