SU1267289A1 - Converter of parameters of three-element two-terminal networks - Google Patents

Abstract

This invention relates to instrumentation technology. The purpose of the invention is to increase the speed of the device. The converter contains a voltage driver 1, an onopHbdt resistive element 2, a DC amplifier 3, differentiators 5 and 10, a voltage adder 8, an integrator 11, an inverting unit 7. Introduction of the separation element 6, a log amplifier 9, a voltage adder 12 voltage divider 13 with the formation of new functional connections allows to obtain information before the end of the transition process. 5 il. (L

Description

-h. Fig, 1

 u-nJ U-Ck2 The invention relates to instrumentation engineering and can be used to convert the parameters of three-element bipolar circuits to unified electrical signals. The purpose of the invention is to improve the speed of C4et to obtain information before the end of the transition process. FIG. 1 shows a structural electrical circuit for converting parameters of three-element bipolar circuits; FIG. 2 - time diagrams; in fig. 3–5 are two-terminal variants that can be transformed. The converter of parameters of three-element bipolar circuits contains a voltage driver 1, a resistive support element 2 a DC amplifier 3, a two-terminal test 4, the first differential 5, a separating element 6, an inverting unit 7, the first adder 8 voltages, a logarithmic amplifier 9, the second differentiator 10, the integrator 11, the second adder of 12 voltages, and the grandfather of 13 voltages. Different variants of the studied two-terminal devices may contain first 14Cx and second 15Cx2 capacitors and a resistor 16 and.;,, First 17 RX and second 18 I resistors and a 19C capacitor) (, first inductance 20b, resistor 21 I j second inductance 22LX, inductance 23b, first 24R and the second 25Rx resistors.In addition, the device has an input start clamp 26. The start voltage 26 is connected to the input of the voltage-shaper 1 of the reference voltage, and the output of the shaper 1 of the reference nagging voltage is connected through the resistive support element 2 to the input of the DC-3 amplifier and first in water of the studied two-terminal 4, the second output of which is connected to the output of the amplifier 3 Duty current and the input of the first differentiator 5, the output of which is connected to the input of the separating element 6 and the first input of the first voltage adder 8, the output of the separating element 6 through the inverting unit 7 connected to the input of the logarithmic amplifier 9 and the second input of the first sum of the torus B. The voltage of the logarithmic amplifier 9 is connected to the second input of the second voltage adder 12 and through the second differentiator 10 with the first in the divider 13 voltage and the integrator input 11, the output of which is connected to the first input of the second voltage adder 12, the output of which is connected to the second input of the voltage divider 13. The outputs of the first B and second 12 summator voltages, the second differentiator 10 and the divider 13 voltages connected to the corresponding outputs of the converter. The Converter operates as follows. The Start voltage surge signal with amplitude 1) from the output of the driver 1 of the reference voltage through a resistive support element 2 enters the input of the amplifier 3 of direct current, the negative voltage circuit 4 of which is connected to the output voltage being investigated (FIG. 2a) amplifier 3 direct current W-Mge- - -M. s, k "Voltage (Fig. 26) at the output of the first differentiator 5 U, (i), s," R ,, c. where LUJ is the constant differentiation of the first differentiator 5. By filtering the constant component of the voltage CU) by the separating element 6, the output voltage (fig.2b) of the inverting unit 7 is obtained (i) the output voltage (fig.2g) first adder 8 voltages U, (t), 0. E. In proportion to the value of Sc, the output of the logarithmic force is 9 (Fig. 2) and there is a voltage

U, U) V

Ko-Xj-Xt

where X is the conversion factor of the logarithmic amplifier 9.

Output voltage (Figure 2e) of the second differentiator 10

)

resistive support element 2 (RJ. (FIG. 4)).

A two-port device may consist of a first 24 and a second 25 resistors and an inductance 23 (figure 5). Investigated two-port 4 is included in the feedback circuit of the amplifier 3 direct current, and an inductive support element (not shown) is turned on at its input.

Claims (1)

Claims of the invention where ig, o is a constant differentiated second differentiator 10 i.e. U (t) is proportional to the value of the time constant of the two-port 4 under study. The output voltage (Fig. 2g) of the integrator 11 4, (t) with f (hert f is the integration constant of the integrator 11). The voltage at the output of the second sum of the 12 voltages C, 2 () (Fig. 2) is determined by the extrusion: UJi) .. KSn- | i, i.e. will be proportional to the value of cx. The output voltage of the divider 13 of the voltage U ,, (i.e. determined by the value of R. The converter also converts the parameters of a two-pole device consisting of the first 17 and second 18 resistors and a capacitor 19 (FIG. 3). The two-terminal 4 under study is connected to the input of the amplifier 3 DC, and a capacitive support element (not shown) is placed in the negative feedback circuit. The two-pole can consist of a first inductance 20, a resistor 21 and a second inductance 22. At the same time, it is connected to the input of the DC amplifier 3, the chain is negative Secondary feedback including a three-element bipolar circuit parameters converter containing a shaper reference voltage generator, the input of which is connected to the Start input terminal, and the output of the voltage reference generator are connected via a resistive reference element to the input of the DC amplifier and the first output of the two-port circuit being studied, the second output which is connected to the output of the DC amplifier, the first and second differentiators, the integrator, the first voltage adder, the inverting unit, and the output of the amplifier The direct current is connected to the input of the first differential amplifier, and the output of the inverting unit is connected to the second input of the first voltage adder, characterized in that, in order to improve speed, a separation element, a logarithmic amplifier, the second voltage adder, and the output the first differentiator is connected to the first input of the first voltage adder, as well as to the input of the inverting unit through a separating element, the output of the inverting unit is connected to the input of a logarithmic the amplifier whose output is connected to the second input of the voltage adder, and also through the second differentiator to the first input of the voltage divider and to the input of the integrator, the output of which is connected to the first input of the second voltage adder, the output of which is connected to the second input of the voltage divider , while the outputs of the first and second voltage adders, the second differentiator and voltage divider are connected to the corresponding outputs of the converter. IT c: i /five Rig.2 Zh Z5 fig 5