SU396632A1 - DEVICE FOR MEASURING THE RELATIVE DIFFERENCE OF THE POTENTIAL RATE OF PULSES - Google Patents

Description

one

The invention relates to the field of electrical measuring equipment and can be used to improve the performance of relative difference frequency meters.

A known device for measuring the relative difference in pulse frequency, comprising a sequential pulse shaping unit of two frequencies, a differential frequency extracting and pulse shaping unit, a coupling capacitor, diodes, an IB pulse frequency converter with a current generated by capacitors, resistors and diodes, and a measuring device characterized by reduced speed.

In the proposed device, between the capacitors and the resistors of the bridge converter the isolation diodes are turned on, with the anode of the first and the cathode of the second separation diodes connected to the capacitors.

Due to such an embodiment of the device, its speed is increased.

The drawing shows a block diagram of the device.

The device consists of a block / alternate pulse shaping of two frequencies, a block 2 for extracting and shaping a pulse difference frequency, a measuring circuit 3 including separation capacitor 4, diodes 5, 6, 7, 8 connected to a bridge formed by capacitors 9 and 10, separation diodes 11 and 12, resistors 13 and 14, and the measuring device 15. The device operates as follows.

The input pulses of frequencies (i and / g) are fed to the inputs of the block /, where pulses of frequencies (1 and / 2) are formed, with the exception of pulses of a higher frequency, which coincide with the difference pulses. The differential frequency pulses generated by block 2 carry the same charge as the operating frequency pulses.

The capacitor 9 is charged through the capacitor 4 and the diode 5 with frequency pulses i, and the capacitor 10 through the capacitor 4 and diode 6 -

frequency pulses / 2. Capacitor discharge

9 n 10 of the bridge occurs respectively through

separation diodes 11, 12, resistors 13 and

14, measuring device 15.

A differential pulse, which is a current pulse with a duration equal to a period of greater frequency / 2, flows through diode 8 into the measuring circuit and creates a voltage across resistor 14 equal to the average voltage value in the absence of a differential pulse. The gate separator 12 is closed, and for a period Ha, the capacitor 10 is disconnected from the discharge circuit. Thus, by the arrival of the next voltage pulse on the circuit elements remain the same, that

provides no transition process.

The current in the bridge diagonal contains a constant component equal to the average for the period of the difference frequency the value of the current of the pulses, the operating frequency, the frequency, and the difference frequency pulsation.

The average value of the current in the diagonal is proportional to the relative frequency difference.

Subject invention

A device for measuring the relative difference in pulse frequency, comprising a sequential pulse shaping unit of two frequencies, a differential frequency isolating and shaping unit, a differential frequency, a coupling capacitor, diodes, a bridge of a frequency converter following a pulse into a current formed by capacitors, resistors and diodes, and a measuring instrument, characterized in that, in order to increase the speed, the separation diodes are connected between the capacitors and the converter bridge resistors, and Orum connected anode and cathode of the second first separating diodes.