SU1584074A1 - Device for temperature stabilization - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to improve accuracy. The device of temperature stabilization contains an operational converter 1 voltage - current, current sources 2 and 3, resistor 4, phase splitter 5, reflectors 6 and 7 of flowing out and flowing currents, capacitors 8 and 10, synchronous detector 9, driver 11 pulses and r-r 12 alternating voltage. The phase splitter 5 together with the reflectors 6, 7 and the capacitor 8 forms the first inverting inertia link, which sets the voltage at the control input of the steepness converter 1. At the same time, the phase splitter 5 and the reflectors 6, 7 together with the detector 9 and the capacitor 10 form the second inertial link setting the voltage at the forward input of the converter 1. To ensure the normal operation of the device, it is necessary that the time constant of the first inertial link be longer than the time constant of the second inertial ion link. The goal is achieved by reducing the effect of the bias voltage of the zero transducer 1. 2 Il.

Description

SP 00 4 O

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The invention relates to radio engineering and can be used in analog circuitry.

The purpose of the invention is to improve accuracy by reducing the effect of the bias voltage of the operational voltage-current converter.

Figure 1 shows the structural electrical circuit of the device for temperature stabilization; 2 shows the amplitude characteristics of an operational voltage-current transformer.

The temperature stabilization device contains an operational voltage converter - current (OPNT) 1, first 2, second 3 current sources, resistor 4, current phase splitter 5, reflectors 6 and 7 of flowing and flowing currents, first capacitor 8, synchronous detector 9, second capacitor 10 , shaper 11 pulses, alternating voltage generator 12.

The device temperature stabilization works as follows.

The presence of a zero bias voltage of a PDNT 1 leads to the fact that the real amplitude characteristic (Fig. 2, curve II) of the KPNT 1 turns out to be somewhat different from that required (Fig. 2, curve I, where VMHH and Umax are the minimum and maximum values of variable voltage, respectively). The following is accomplished in the proposed device at the entrance of the LSS 1) and for its alignment.

The current phase splitter 5, together with the reflectors 6 and 7 and the first capacitor 8, form the first inverting inertial link, which sets the voltage at the control input of the slope of the SNRT 1 such that the difference of the amplitudes of the current of the SNRP 1 | O (t) and the second source 3 of the current W ( t) for the period of the clock frequency T of the alternating voltage generator 12 is zero, i.e. the relation is satisfied

, x (t) -l3 (t) dt 0. (1)

At the same time, the current phase splitter 5, the reflectors 6 and 7 together with the synchronous detector 9 and the second capacitor 10 form the second inertial link, which is used to establish a voltage at the direct input of the SNRT 1 such that the difference of the amplitudes of the current of the SNRP 1 and the second current source 3 equals zero at each time, i.e. fulfilled relationship

1st (X) -1 (. (2)

The fulfillment of relations (1) and (2) results in a voltage equal to the offset input voltage of the SNRT 1 at the direct input of the SNRT 1, and a voltage is established at the control input of the slope of the SNNT1 such that

ten

 11.1

12 R

(3)

where b, 1h are the amplitudes of the currents of the first 2 and second 3 sources of currents;

R is the resistance of the resistor 4.

5 As a synchronous detector 9

a balanced modulator or four-square analog multiplier circuit can be used, in which controlled inputs are used as current inputs

0 current sources, and the voltage input is used as the reference input.

In addition, to ensure the normal operation of the temperature stabilization device, it is necessary that the time constant of the first inertial link be longer than the time constant of the second inertial link.

Claims (1)

0 claims A temperature stabilization device containing the first and second current sources, the first terminals of which are connected to the power supply bus, 5 voltage converter - current and resistor, the first output of which is connected to the common bus, and the second output - to the second output of the first current source and the inverting input of the operating voltage converter - current, the output of which is connected to the second output of the second current source, characterized by that, in order to increase accuracy by reducing the effect of zero bias voltage 5 operational voltage converter - current, a current phase splitter, an effluent current reflector and an inflow current reflector are introduced, having first and second outputs, first and second capacitors, a synchronous detector, a pulse driver and an alternating voltage generator, with the first and second current sources controlled voltage, operating output 5 transducer voltage - current is connected to the input of the current phase splitter, the outputs of which are connected to the inputs of the reflectors of the flowing and flowing currents, respectively, the first outputs of which connected to the input of the control of the slope of the operational voltage converter — current and through the first capacitor — to the common bus; the second outputs of the reflectors of the outgoing and flowing currents are connected respectively to the first and second current inputs of the synchronous detector, the current output of which is connected to the non-inverting input of the operating transducer gel voltage - current and through the second capacitor - to the common bus, while the output of the alternating voltage generator is connected to the control inputs of the first and second current sources and in The pulse shaper generator, the output of which is connected to the reference input of the synchronous detector. Fig z