SU1511697A1 - Converter of pulse amplitude to d.c. voltage - Google Patents

Abstract

The invention relates to a pulse technique and can be used to measure the amplitude of pulses. The purpose of the invention is to improve the accuracy of the amplitude conversion of the input signal by ensuring the constancy of the relative conversion error. A positive effect is achieved by forming a compensating voltage directly proportional to the amplitude of the input signal, which is provided by additional connections of the input of the detector 6 to the input of the device and the output of the analog storage element 7 to the input of the repeater-inverter 4. In addition, the converter contains a comparator 1 , RS trigger 2, 3 pulse generator, integrator 5, synchronization unit. 2 Il.

Description

one

(21) 4264158 / 24-21 (22) 23, (46) 30.09.89, Bul, .№ 36 (72) M, I.Kukushkin

(53) 62,317.7 (088 „8)

(56) USSR author's certificate 1174872, кп. G 01 R 19/22, 08.23.83.

.LSTOpcKoe certificate of the USSR 1288615 cells, G 01 R 59/22, 07/27/84,

(54) PULSE AMPLITUDE CONVERTER IN 1STIMENTAL GALS-4 VOLTAGE

(57) The invention relates to an impulse technique and can be used to measure the amplitude of pulses. The purpose of the invention is to improve the accuracy of the amplitude-value conversion of the input signal by ensuring the constancy of the relative conversion error. The positive effect is achieved due to the formation of a compensating voltage directly proportional to the amplitude of the input signal, which is provided by additional inputs of the detector 6 with the device input and the output of the analog storage element 7 with the inverter-follower 4, Except In addition, the converter contains a comparator 1, an RS flip-flop 2, a 3 pulse generator, an integrator 5, a synchronization unit. 2 Il.

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The invention relates to a pulse technique and can be used to measure the amplitude of pulses.

The purpose of the invention is to increase the accuracy of the amplitude conversion of the input signal by ensuring the constancy of the relative conversion error.

FIG. 1 shows a functional converter circuit; FIG. 2 shows the time diagrams for his work.

The pulse-to-voltage amplitude converter contains 15 oscillator 1, the first input of which is the converter input, the output of which is connected to the first input of the RS flip-flop 2, the second input of which is connected to the output of the generator 3 pulses, and the output Inverter repeater 4, the output of which is connected to the input of integrator 5, which is connected to the second input of comparator 1 with its output, is the output of the converter, the peak detector 6 connected in series and the analogue storage element 7, the input of the peak detector 6 is connected to the input of the converter, the output 30 of the analog storage element 7 is connected directly to the input of the source inverter 4, the synchronization unit 8, the input of which is connected to the input of the converter, the first output 35 to the input of the reset of the peak detector 6, the second output is with the control input of the analog storage element 7,

The device works as follows 40 times.

At the initial moment of time, the integrator 5 is in the reset state, the voltage at its output is zero. An input sequence of pulses is given to the input of comparator 1 through -45 (Fig. 2a), where a comparison is made with the value of the compensating voltage. In this case, at the output of comparator 1, if the amplitude of the input signal is 50, pulses are formed (Fig. 26), which suitably sets the RS flip-flop 2 (Fig. 2c), the output signal (Fig. 2d) of which is received 55 on the control input of the repeater-inverter 4, sets the sign of its transmission coefficient so that the signal generated by the analog

memory element 7 (Fig. 2d) and fed to the input of the repeater - inverter 4 (Fig. 2e) 5 falling through it to the input of the integrator 5, leads to an increase in voltage U at its output (Fig. 2g). At the moments of arrival pulses from generator 3 (Fig. 2), a brief change in the direction of integration of integrator 5 occurs until the arrival of the next input pulse. An increase in compensating voltage and q will occur as long as the condition is met.

When the condition Uj.V is fulfilled, the first impulse from generator 3, RS-trigger 2 will transfer (Fig. 2d) and set the direction of integration in the direction of decreasing voltage (Fig. 2g). This process will continue until the condition is again satisfied, after which the compensating voltage again begins to increase and the process will be repeated. In the set mode, the voltage will oscillate around the magnitude of the voltage, different magnitude of the voltage amplitude of the input pulses. With this range of these oscillations / u, the absolute value of the absolute error of conversion

ATI 5 t

 8TH RC WP

()

where Ug is the voltage value at the input of the follower-inverter 4; RC is the integrator time constant 5;

TCr is the period of the generator signal Zo. In this case, the voltage Ug ,, is equal to

(2)

e K the transmission coefficient of the series-connected peak detector 6 and the analog filling element 7; V is the amplitude of the input signal, which is formed by means of peak detection with subsequent sequential overwriting of the voltage value of the peak detector 6 into the analog storage element 7, which is synchronized by block 8,

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Claims (1)

Claim A pulse amplitude to DC voltage converter containing a comparator, the first input of which is connected to the input of the converter, and the output is connected to the first input of the RS trigger, the second input of the RS-trigger of the inverter, the output of which is $ keys to the input of the integrator, the output of which is connected to the second input comparator and is the output of the converter, a peak detector and an analog jamming element _£ connected in series. a synchronization unit, the input of which is connected to the input of the converter, the first output is with the reset input of the peak detector, the second output is with the control input of the analog 15th memory element, which means that, with the whole increase in conversion accuracy, the peak detector input is additionally connected with the input of the converter, and the output of the analog storage element with the input of the repeater-inverter. fig 2