SU834529A1 - Stroboscopic converter of electric signals - Google Patents

Description

(54) STROBOSCOPIC ELECTRIC SIGNAL TRANSMITTER INPUTS - with delays for measuring strobe pulse code buses, and a clock input - with the first input of three generators, the second input connected to the output of the second;: o valve, whose first input is connected with the output, divide the frequency, the counting input of the pulse counter, the synchronization input of the shift register and the first input of the first fan, and the second input with the pulse counter reset input and the second shift register output, whose information input is J connected with the transfer output of the counter and pulses, and the first output, with the control input of the Multiplexer and the second input of the first valve, and the counting input of the frequency divider is connected to the output of the clock generator. The structural electrical circuit of the device is shown in the drawing. The device consists of a clock crystal oscillator 1, frequency dettel 2, synchronous subtractive count 3, trigger 4, trigger signal bus 5, first and second fan 6 and 7, pulse counter 8, double shift register 9, element 1O OR, bus 11 of the signal under study, gated comparison unit 12, first and second reversible counters 13 and 14 pulses, output code bus 15, code reading unit 16, multiplexer 17 and chi}) analog (optical converter) 18. The device operates as follows. The generator 1 forms NOSTA osledovatel pulses with a stable period. The output of divider 2 is allocated to each pulse sequence. emye was isolated pulses counted counter 8 Nut capacity sig kala overflow which receives the information input register 9 ischity

vyat with a decrease in pulses at the output of the divider

2. The signal from the primary output of register 9, which controls the switching on of the reference (or measuring) channel, goes to the input of the control of multiplexer 17, and also unlocks the first {6th gate 6, from the output of which the reference strobe pulses are fed to the first input of the element 10 OR, and to the counting the input of the second roar {counter of the counter 14. The signal from the second output of the register 9 resets from the transmitter 8 so that the period of its output pulses is .T (N + M), as well as unlocking

interference and shear zero voltage of the comparator block 12. The difference of the codes at the output of the code reading block 1 corresponds to the instantaneous value of the signal in the phase determined by the measuring pulse.

The proposed device allows improving the accuracy of low-amplitude peri- odic pulse signal conversion due to: compensating for both the drift zero transform and the low-frequency noise at its input with high linearity of the sweep, and also provides the gate 7. At the same time, the next impulse from the output of the divider 2 enters through the gate 7 to the input of the trigger 4, which binds the phase of this pulse to the generator 1 signals. The required delay in the counter 3. From the loan output of the counter 3 operating in the subtraction mode, the measuring strobe pulses are detained relative to the triggering time pulse NyT, where NX is the code of the required delay of the measuring strobe pulses (). These pulses arrive at the second input of the element l6 OR and the counting input of the first reversible counter 13 pulses. The multiplexer 17 alternately connects the code outputs of counters 13 and 14 to the input of the DAC 18 so that the arrival of the reference and measuring strobe pulses through element 10 OR to the control input of the comparison unit 12 is preceded by the establishment of a corresponding reversing voltage on its second signal input counter. At the moment of arrival of the strobe pulse, comparator unit 12 compares this voltage with the signal under test, with the result that the code in the corresponding reversible counter changes by ± 1 in the direction of balancing the instantaneous value of the signal under study. In the steady-state mode, the code in the reversible counter of the reference channel 14 corresponds to the sum of the zero value of the signal under study, the low-frequency interference voltage at the device input and the zero shift voltage of the comparator unit 12, and the code in the reversible counter 13 of the measuring channel - the sum of the signal under study the moment of time delayed by the time Cit with respect to the trigger pulse directs the docking of the digital control computer when the computer issues the delay code Ny and receives the code of the instantaneous value of the signal being transmitted at the point

4ft-NxT ..

Claims (1)

Invention Formula A stroboscopic transform (a signal etepric signal containing a clock generator, a pulse counter, a ventilator and a gated comparison unit, the first signal input of which is connected to the signal bus, and the second signal input to the output of a digital-analogue converter connected to the output multiplexer, the first inputs of which are connected to the coded outputs of the second reversible pulse counter, and the second inputs to the code outputs of the first re, versatile 1 pulse counter, characterized in that increase accuracy, it is equipped with a synchronous subtractive counter, a frequency divider, a two-bit shift register, a trigger, a second gate, an OR element, and a code reading block whose inputs are connected to the code outputs of the first and second reversible counters whose reverse control inputs are connected to output gated unit comparison, the counting input of the second reversible counter - with the input of the OR element and the output of the first valve, the counting input of the first reversible counter - with the second input of the OR element and the loan output of the asynchronous detracting counter, the installation input of which is connected to the output of the trigger and trigger signal, code inputs - with the delay code buses of the measuring strobe pulses, and the clock input - with the first trigger input, the second input of the second valve connected to the output, the KOTOpotx input) is connected to the output of the frequency divider, the counting input a second pulse input, with the pulse counter reset input and the second shift register output, whose information input is connected to the transfer output of the pulse counter, and the first output with the control input of the multiplexer and the second input is b (the th valve, and the counting input of the frequency divider is connected to the output of the clock generator .. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 565391, cl. H 03 K 13/17, 1975 (prototype).