SU547699A1 - Operational device for converting electrical circuit parameters to voltage - Google Patents

Description

The power clamps of the repeaters and the voltage booster are connected in series.

The drawing shows a structural electrical circuit of the proposed operational device.

The device contains a two-pole multi-element 1 consisting of a series-connected current supply circuit 2 and a circuit 3, containing (N-1) directly proportional impedances 4. The current supply circuit contains an inversely proportional impedance 5 and the source 6 of the reference voltage. Non-inverter repeaters 7 have transmission coefficients close to one. Inverse amplifier 8 has a gain much greater than one. The multi-element power pole is connected to the high potential output terminal 9 of the first repeater and to the low potential output terminal 10 usiptel 8.

The operation of the device is carried out as follows.

Directly proportional impedances 4 are connected to the inputs of the repeaters 7. A Tocoscade switch 2, containing inversely proportional to them RggEHc 5, is connected to the input of the amplifier 8. The voltage of the i-t is directly proportional to the impedance 4 and the voltage at the output of the i-one repeater 14 expressions correspondingly lm

KjZ;

tii li-ufi.K)

()

rge Z j and Z 4 are respectively the impedances of i-TOro directly proportional and inversely proportional to impedances 4 and 5. U is the voltage of the source 6 of the reference signal; Kj is the gain of the i-th voltage follower (i

1.2 N); K is the gain of the amplifier 8.

Non-linear error is determined by expulsion.

J-Kj ZN-I

  OK 1ts nk g „ifK 7.N

It follows that the error in the nonlinearity decreases with the approach of Kj to the unit and with an increase in the gain factor K.

In known operating devices, the non-linearity porosity is determined by the expression

r- (i-H,) | i- (i-H,.) () | MODDM

Thus, iipejciaiaeMoe ycipoficrBO provides a (I – n K) times less error in comparison with the known devices. At the same time, in the Ivestyu 1X devices, high requirements are placed on the stability of the transfer coefficients Kj of new voltage tori gels. In the proposed device, the stability of the compression curves of the transmission of the Ki voltage repeaters and the gain factor K of the amplifier Eie pre, b. Has strict requirements, since this is where the compensation of the changes of K | and K.

In the device, the linearization condition (u; w) does not depend on the parameters of impedances 4 and 5, i.e. a change in Zj and Zfyj (e.g., due to the interaction of influencing factors of temperature, wet ™, etc.) does not affect the linearity of the conversion function.

Claims (2)

Invention Formula An operational device for converting electrical circuit parameters to a voltage containing a multi-element two-port network consisting of a series-connected (N-1) directly proportional to the normal impedance and current supply circuit from a series-connected reference voltage source and inversely proportional impedance (M-1 ) voltage followers, the inputs of which are connected to the corresponding directly proportional impedance, characterized in that, in order to increase the linearity of the conversion function and enhance the functionality, an inverse voltage amplifier is inserted into the device, the input of which is connected to the current setting slot, and a multi-element two-terminal; connected between the high-potential OUTPUT1SH1M terminal the first voltage follower and low-degree output terminal of the inverse voltage amplifier, and the rest of the output terminals of the voltage followers The p and inverse voltage amplifier are connected in series. Sources of ipho1) matsii taken into account during examination: . The Angora Certificate of the USSR N 296045, M.Kp G 01 R 17/06, published 08/05/69. 2. Wolves L.I. Linear electrical transducers for measuring equipment and systems Soviet radio, 1971. fig. 22