SU430504A1 - CONVERTER OF SINUSOIDAL VOLTAGE TO CODE - Google Patents

Description

The invention relates to radio engineering, instrument making and co-testing of: measuring equipment and can be used in centralized control systems, centralized control systems, control systems for parameters of radio engineering circuits and other systems where it may be necessary to convert the amplitude of a harmonic signal into a code. The test converter contains a comparison device, the first input of which is connected via a discrete voltage divider and voltage driver to the output of the control unit, the other output of which is connected to one input of the matching circuit, the other input of which is connected to the output of the pulse generator, and the output to ONE; the control circuit input of a discrete voltage divider, the other input of which is connected to the output of the comparison device. The aim of the invention is the elimination of a collapsing voltage source. This is achieved by introducing two integrating RC-peeps into the device, a key, a subtractor, the output of which. It is connected to the second input of the comparator, the inputs are connected to the middle points of the integrating RC circuits, the input of one of which is via a key controlled by the control unit, and the second is directly connected to the SOURCE of the converted voltage and the input of the control unit. The invention is illustrated in the drawing. The input signal U sinco is fed to the serial integrating RC circuit U, the control unit 2 and the key 3. The integrating circuit RC-1 consists of a series-connected resistor .R and a capacitor C. At the end of the transition process in the integrating circuit /; signal “Start. Using this signal, the control unit 2 determines the moment of reaching the maximum of the maximum voltage across the capacitor C of the integrating circuit /. This can be done, for example, by determining the moment of equality of the current in the same or identical circuit located on the control unit. At this moment, the control unit 2 opens the key 3, and the voltage is connected to the input of the other integrating RC circuit 4. The values of R and C circuits I and 4 must be the same. In the integrating circuit 4, a transient process begins. The capacitor pa is determined by extracting e "C -" T; -7; f C03 (sy1 + ff) -COS (Y -w) /,

where ij; - Phase IJ voltage at the moment of its connection to the integrating circuit 4; F is the angle of shear between ts.kom and, for example, in the integrating circuit 4; and, “the amplitude of the input signal; - 03 is the frequency of the input signal;

t - constant time integrating

chains 1 W. 4.

Due to the fact that the moment of commutation. however, the integrating circuit 4 was chosen from the condition r (sf can be written

t

and"

 (COSCO - /)

and, 1 + (# RC)

Forced voltage 1Blc voltage on the capacitor C of the integrating circuit / with respect to the moment of opening the key 3

and,

U2 coswf

Kl + () 2

At the output of the subtracting device 5, we obtain the voltage

„.- / 3 f / 2-; У1.

to l + () 2

For the case of a fixed frequency of the input signal or, under the condition for the frequency range, you can record

63 / Cf /,

The voltage f / C is fed to one of the inputs of the comparing device 11.

Simultaneously with the switch of the key 3, the control unit starts the shaper of the support supersoncional on April 7 and opens the matching circuit 5. The shaper of the reference exponential stress / produces the reference voltage.

/ Wo. Uo-i

The constant time of the forming chain of the reference exponential nanopatype must be equal to the time constant of the integrating chains and /. The voltage UO.R enters the input of the discrete divider 9.

The pulses from the pulse generator 10 pass through the coincidence circuit H | And 8 and are fed to the control circuit 11. The voltage from (the TypeKoro TH divider 9 "aperture output goes to the second input of the comparison device 6. The output of the last D1 appears on the discrete control circuit sxoia divider 9. Through the control of the NIEA cycle, the control circuit // will be used to obtain such a coefficient of transmission of the divider L for which the correlation is satisfied

tt

  e

t

 / (f / ,.

From here

K and

N.

 to, and „

c / o

Thus, a code proportional to the amplitude of the input signal will be set at the output of the converter.

Subject invention

A sinusoidal voltage to code converter that contains a comparison device, the first input of which is connected via the discrete voltage divider and the reference exponential voltage driver to the output of the control unit, the other output of which is connected to one input of the coincidence circuit, the other input is connected to the output of the pulse generator and the output with one input of the voltage distribution circuit of the voltage-controlled voltage divider, the other input of which is connected to the output of the ycTipo CTiBa comparing, characterized in that

and connecting a complicated source of direct voltage, “it contains two integrating RC circuits, a key, a subtracter, the output of which is connected to the second one input of the comparator, X. odes are connected to the middle points of the integrating RC circuits The input of one of which is through the key, controlled by the control, with the input of the second is directly connected to the source of the converted voltage by the input of the control unit.