SU481848A1 - Device for measuring the amplitudes of pulse signals - Google Patents

Description

(54) a device for measuring the amplitude of pulsed SMGPA / SE

the output of which is associated with one of the inputs of the coincidence circuit.

The principle of operation of the device is as follows.

First, the input to the counter is

counting pulses, the number of which is proportional to the amplitude of the measured signal, then pulses are fed to the counter input; proportional to the voltage level set at the source of the adjustable stabilized voltage. In the first case, the counter operates in the addition mode, in the second in the subtraction mode.

By varying the voltage level at the output of the variable voltage source, a zero indicator reading is obtained. This means that the set voltage level of the source of the adjustable voltage and the amplitude of the voltage of the measured pulse signals are equal, compressed.

The control of the operation of the device circuit osostoshvl sets the distributor of pulse commands, which is connected to the master of the number of cycles of operation of the distributor.

The drawing shows a block diagram of the device.

The device contains a pulse control switch distributor 1, switches 2-6, reference capacitors 7.8, resistor 9, amplifier 1O, unit 11 compared with a source of stepwise varying reference voltage, source1 of adjustable stabilized voltage 12, element OR 13, circuit coincidence 14, regulating the time of passage of the counting pulses, the generator of counting pulses 15, the reversible counter 16, the auxiliary register 17, the time delay block 18, the block 19 decryption and display of the outputs of the auxiliary register, the number task block iklov operation control commands of the distributor 20, The discharge resistors 21 and 22 and 23 ka Knoop discharge the reference capacitors.

On the first command, received from the distributor of pulse control commands 1, the key 2 is opened and the charge of the capacitor 7 starts up to the amplitude value of the voltage UQ of the series of measured pulse signals. The second command opens switch 3 and begins to discharge the capacitor 7 to resistor 9 and the input circuit of amplifier Y. The output voltage from amplifier 1O arrives at the input of comparison unit 11, which compares the reference voltage and voltage of output of amplifier 1O. By the third command, the capacitor 8 is charged through the open key 4 from the source of adjustable stabilized voltage 12. The fourth command produces the discharge of the capacitor 8 through the open key 5. on the resistor 9 and the input of the amplifier 10.

The second and fourth commands from the distributor of pulse commands 1 are also sent to H / JH 13, output KoTOpoi | connected to the input of the matching circuit 14. The second signal received by the matching circuit 14 is the signal from the comparison unit 11. The key 6 opens simultaneously with the keys 3 and 5 and closes when the voltage from the output of the amplifier 10 is compared to the reference voltage By the comparison block 11. At this moment, in the comparison block 11, a signal is generated which blocks the output of the coincidence circuit 14, as a result of which the key 6 is closed. The key 6 controls the passage of the counting pulses produced by the pulse generator 15 to the input of the reversible counter 16. The reversible counter 16 operates in the add mode when the capacitor 7 is discharged and in the subtraction mode when the capacitor 8 is discharged. By the fifth command from the pulse command distributor control 1, the auxiliary register 17 triggers are reset to the left state.

By the sixth command, permission is given to rewrite the state of the triggers of the reversible counter 16 into the auxiliary register 17, and the same command, via the time delay 18, reversible counter 16 is reset to zero. condition. The outputs of the triggers of the auxiliary register 17 are connected to the decryption and indication unit 19. The indication of the counting result is maintained for the next cycle until the triggers of the auxiliary register 17 are reset to zero.

The number of operation cycles of the pulse control command distributor is set by block 20.

The device also provides for manual installation of the reversible counter 16 and the auxiliary register 17 in the zero state.

By measuring, one of the levels of the reference voltage is set, which can be varied in steps, with the voltage of the lower stage exceeding the lowest voltage level of the regulated stabilized voltage source 12. If the set level of the reference voltage exceeds the amplitude of the measured pulses, the key 6 is blocked and on the reversible counter 16, the count is not 1 6 produced. By switching the stages of the reference voltage, the state of the device is achieved in which the counting on the reversing counter 16 begins. In this case, the first rough determination of the amplitude of the measured pulse signals is performed. Then, for a more accurate measurement of the amplitude of the pulsed, the signals at the output of the source of the reference voltage, which is in the comparison block 11 ,, on the basis of the first coarse determination of the amplitude of the measured pulses (V), establish a voltage equal to approximately 0.4 u When measuring the amplitude of a sequence of pulses by changing the voltage level of an adjustable stabilized voltage source 12, a zero counter 16 is obtained. At the same time, The voltage level at the regulated stabilized BaiHOM source 12 and the voltage amplitude of the measured pulse signals are equal and compensated. It is possible that the adjustment of the voltage regulation of the stabilized voltage source 12 is terminated with an insignificant underperformance. Then the magnitude of the a. Amplitude from the iep e of the pulse signals is determined by the value of the regulated voltage, taking into account the sign of deficiency of sensation, which is determined by the digital indicator 19 of the device. The device can also measure the amplitude of single pulses. In this case, one measurement nickname is set, the reversible counter 16 operates in positive and negative undercompensations; At the output of the reference voltage source, which is located in Comparison Unit 11, one of the lowest voltage levels is established, if the expected magnitude of the pulse amplitude is not known. Necessary - | The condition for measuring the amplitudes of single pulses is the synchronization of the opening of the key 2 and the arrival of the measured pulse. An automatic compensation can be additionally provided for in the device. and automatic selection of measurement limits. Before each new measurement, the capacitors 7 and 8 discharge the resistors 21, 22 by pressing the button 23. Object of the Invention A device for extracting amplitudes of pulsed singals containing reference capacitors, a source of adjustable stabilized voltage, a unit of comparison with a source of stepwise varying voltage, a counting pulse generator, characterized in that, in order to improve the accuracy of measuring the input of keys into it, a coincidence circuit, an amplifier, an OR element, connected in series to an impuser number setting unit pulses, pulse distributor, whose outputs are connected to the control inputs of all keys and an OR element, reversible counter and auxiliary register, with the counting pulse generator, the first key, the reversing counter, the auxiliary register and the indicator in series, the first reference capacitor through the second the key is connected to the input of the device, and the third key is connected to the input of the amplifier, the second reference capacitor is connected via the fourth key, the source of adjustable stabilized voltage to ground and input device, and after the fifth key - with series-connected amplifier and comparator circuit, the output of which is coupled to one input of the coincidence circuit. iI