SU574724A1 - Integration device - Google Patents

Description

STOTS and through two chains consisting of a series-connected threshold element, a key, an OR element, a frequency divider, with trigger inputs, the trigger output is connected to the input of a low-pass filter, the output of which is the device output, the output of the variable frequency generator is connected to the control the inputs of the keys, and the output of the generator of clock pulses - to other inputs of the elements OR.

The drawing shows a functional diagram of the device.

It contains an amplitude detector 1, a threshold element 2, a key 3, an element OR 4, a frequency divider 5, a variable frequency generator 6, a clock generator 7, a trigger 8, a low-pass filter 9, a normal element 10, a key 11, an element OR 12, divider 13 frequency.

The device works as follows.

Suppose that a positive polarity voltage is applied to the integrator input. After conversion by threshold element 2 of the required level, this signal is sent to one of the inputs of electronic key 3. Pulses from the output of variable frequency generator 6 are passed to the other key input, for example, a controlled blocking generator can be used. From the output of the key 3 to the input element OR 4 receive impulses of a variable frequency generator.

When a positive voltage is applied to the input of the threshold element 10, the voltage at its output is zero and thus the key AND is locked. The pulses of the variable frequency generator to the input element OR 12 are not received. The pulses from the generator output 7 clock pulses fall on the other input of the element OR 4. In this case, the frequency of the generator 7 is much higher than the frequency of the pulses of the generator 6. A mixture of pulses from the output of the element OR 4 is fed to the input of the trigger divider 5 frequency.

The second channel of the integrator operates in a similar way, while the pulses with the frequency of the variable frequency generator are present at the output of the AND key only in the case when the voltage at the integrator input has a negative polarity. At the output of the element OR 12 with a positive voltage at the input of the integrator, there are only the pulses of the generator 7, which are fed to the input of the trigger splitter 13 frequency. The voltages from the output of the dividers 5 and 13 of the frequency are applied to the inputs of the trigger 8. After the low-pass filter 9, the signal goes to the integrator's output.

When a single pulse triggered frequency divider arrives at the input, the oscillation phase at the frequency divider output changes by the value of the oscillation period of the clock pulses 1 // 1-TI1. The pulse duration at the output of the trigger 8 can have L1,2-1 the number of discrete states, where "1,2 are the division factors of the dividers 5 and 13 of the frequency. Thus, the base component at the output of the filter can have ni, 2-1 Discrete values. When a positive voltage is applied to the input of the integrator, the constant is yu, and it increases at the output of the filter, and when the negative voltage is applied, it monotonously decreases.

In general, a number of practical cases require a decrease in the constant integration with an increase in the input level of the integrator. For this purpose, the input voltage through the amplitude detector is fed to the control input of the variable frequency generator 6. As the input voltage rises, the frequency of the generator 6 rises and the integration constant decreases accordingly. With the disappearance of the signal at the integrator input, only the pulses from the output are supplied to the inputs of the dividers 5 and 13 of the frequency

generator 7 clock pulses and the duty cycle of the pulses at the output of the trigger 8 does not change. This ensures that the voltage at the integrator output is constant.

Claims (3)

1. Landy R., Davis D., Alberekht A. Reference radio engineer. M., "Gosenergoizdat, 1961. 2.Kaplanov M. R., Levin V. A. Automatic frequency tuning. M., "Gosenergoizdat, 1962. 3. USSR author's certificate LL 453707, cl. G 06G 7/18, 1973.