SU601632A1 - Converter of small resistance variations into time intervals - Google Patents

Description

P | d | bazovatel sodarzhit. Zhtotik / postozhlyugo. On prisheniya, divider 2 matrices, half-bridge 3, consisting of equals vaemdao 4 1I. Switch 5, Differential Amplifier 10, Integrator 11 toka, Ulygan 12, Control Unit 13, Trigger 14.

The operation of the scheme is divided into aa; dv.a taasta. In the 8 clock cycle is open, the key 7 is closed. The integrat 11 of the current integrates the differential current K, the half bridge 3 of the plc. Through the switch 9 (“1”), the lotel medium; days of lolux C | Sta 5. Is supplied to the inverting input of the amplifier 10. The output voltage: the amplifier 10 10 | P (re case The difference is the voltage of the half-bridge 5 IK divider 2, the diode is fed to the non-inverted | input of the integrator 11. Assuming that the switch 9 is connected to the unipolar transistors (residual and second), using the switch 9 and the 70, the switch is nearly as good as the switch. residual iarameters. cha 8, since the error, inoma N1eko,: 1trolI: rue-we: we mean the residual,

Key R: --- jp-, where K is Kok

ef: f: tsis1: rm gain d i: ff | erenni; alyogo uayilitel, strzmoggs IK zero For large zyacheni x / s.

In the iivrcpOM cycle, the key 8 is closed, the key 7 is open.

The design is the FULL discharge of the capacitance of the intruder through the external resistor 6. Switch 9 (position “2”) Transmits the potential of resistor 6 to the input of amplifier 10.

Finish:; si bit integrator f1i: xi .. ruets zero-body 1-2, included larallelno integrator. In this cycle, the amplifier 10 and switch 9 eliminate the effect of the residual parameters of the key 7.

The magnitude of the time interval T at this time for small deviations of the value of CiOH is L

 (R

t. Rl °

 - eleven

the duration of the nvrvugo integration step;

load resistor; deactivation of the resistor; | C: 01 Resistance of the resistor being compared.

F o r M u l a i 3 o b 6 t e n u

A generator of small changes in the voltage in the time interval, containing the source of the local voltage, the output of which is Connected With one input terminal of the converter and the output of one of the resistors of the divider, and through the successively connected discharge resistor, with the discharge and charge keys - with the other the input terminal of the converter, to which one output of the reference | reaistor is connected, the other 1WhIPT of which and the other output of the voltage divider are connected to the common area, as well as the current integrator, zero-organ, To control and trigger, where the current integrator output is connected to one of the inputs

null-0rgan: a, the output of which is connected to one of the INPUTS of the trigger, the other input of which is connected to one of the outputs of the control unit, the other inputs of which are connected to the inputs of the distribution and charging switches, which is so necessary in order to catch the accuracy , a switch connected to the pre-auxiliary output of the wearable unit, and a differential amplifier, the input of which is connected to the moving contact of the switch, and the other to the Oredney T041koy divider, are introduced into it. The differential output of the amplifier is connected to the non-inverting current integrator input, the inverting input of the kotor is connected to the other input {ilul-orgaia. and the output of the dongle key.

Sources of information taken for the first examination:

1. Shl ndin VM Digital measuring transducers and devices. M., Ed. “Higher School, 1973, p. 179.

2. Copyright certificate-USSR №1328EZ, cl. G01R 27/00, 1952.

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