SU744624A1 - Multiplying-dividing device - Google Patents

Description

one

The invention relates to the field of electrical computing devices with pulse-width conversion of analog signals and can be used in computing, 5 machines.

A multiplier-separating device is known, which contains a frequency-pulse modulator, a pulse-width modulator, an amplitude-pulse 10 modulator, and a filter 1.

This device is characterized by relatively low accuracy | th work.

Of the known devices of similar purpose closest to 5 proposed. is a multiplying device containing a series-connected comparison element and an output averaging unit, to another input of which 20 is connected the first voltage source - a multiplier, to the first input of the element:;: a second voltage source — a multiplier controlled generator, input which is connected to a 25 source voltage divider, switch 2.

The disadvantage of this device is the low accuracy of operation due to the effect of changing parameters 30

control of its generator, as well as the comparative complexity of the functional scheme,

The purpose of the invention is to increase the exact j and simplify the device.

This circuit is achieved by the fact that in the device the output of the switch is connected to the second input of the comparison element, the signal inputs of the switch are connected respectively to the first and second outputs of the controlled generator, the third output of which is connected to the control input of the switch.

Figure 1 shows the functional diagram of the multiplying-delight device; Fig. 2 illustrates an exemplary embodiment of a controlled generator; FIG. 3 shows the forms of stresses acting in the device.

The device contains a source 1 voltage yy; yeltyyl l, controlled oscillator 2, switch 3, element .4 comparison, the second source 5 of the voltage-multiplier, the output averaging unit b, the first source 7 of the voltage -ss (knives, output 8 devices.

The controlled oscillator 2 according to the symmetric multivibrator circuit contains the first and second transistors 9 and 10, the first times specifying the resistor 11 and the capacitor 12, the first and second current regulators .13 and 14, the second P8m specifying the capacitor 15 and the resistor 16, the control input 17 Generator and first, second and third outputs 18, 19 and 20. I In FIG. 3 sawtooth voltages at the first and second outputs of the controlled generator are marked a, b, pi voltage at the first input of the SJieMeHTa comparison right angle, acting in averaging average m block - g. The device operates as follows. The controlled oscillator 2 forms a 4 .- voltage of the sawtooth form, the amplitude of which is proportional to the source voltage 1 of the voltage-divider. The pulse duration e0e of the sawtooth voltage, 8 the sum of the components of the oscillation period of the controlled oscillator 2 is determined by the discharge time of the first and second time of the setting of the capacitors 12 and 15, these capacitors charge up to the voltage of the source I separator and are discharged The currents of the respective stabilizers 13 and 14 of the current. The oscillation period of the controlled oscillator 2 is determined by the expression T and (where and is the voltage value of the source 1 of the separator voltage C., Cn is the magnitude of the capacitances of the first and second time capacitors 12 and 15, respectively; I fl are the currents of the first and second stabilizers 13 and 14 tons, respectively, using switch 3, which is controlled by the output signal of generator 2, linearly decreasing: voltage (sawtooth a, b) from the outputs, the control of the bHo generator 2 is alternately fed to the input of the reference element 4. Comparison element 4 compares these voltages with the voltage of the second voltage source 5, the multipliers, the output potential of the element 4 changes comparison, according to the sign of different awes it. input signals (voltages). In the Vicode of the comparison element 4, C is formed by pulses whose duration is determined from the moment of comparison of its input voltages to zero value of the output voltages of the controlled oscillator 2 (fig, 3 v, d)

Claims (2)

744624 Consequently, the durations of the pulses that make up the oscillation period of the controlled oscillator 2 are equal. f. U2C where the value of the voltage of the second source 5 of the voltage of the multiplier, In the output averaging unit b, the output pulses of the comparison element 4 are given an amplitude determined by the voltage of the first source 7 of the voltage of the multiplier, and the constant pulsed is extracted Sequence, As a result, the output of the device 8 produces a voltage defined by the expression ti4 tg, where K is the transmission coefficient of the output averaging unit b; and - the voltage value of the first source 7 of the voltage factor. Substituting the expressions (1) and (2) into expression (3) is obtained. w-k and t From expression (4) it follows that the output voltage of the device does not depend on the parameters of the elements of the controlled generator, 2, which improves the accuracy of the device operation. The absence of a special sawtooth voltage generator leads to a simplified functional circuit compared to the known device. Formula of the invention. A multiplying-dividing device, comprising a series-connected comparison element and a secondary output Vlk, to another input of which a first voltage source is connected, to the first input of the comparison. connected to the second voltage source -cc Gargitele, controlled oscillator, the input of which is connected to the source voltage separator, switch, Because, in order to improve accuracy and simplification, the switch output is connected to the second input of the comparison element, the signal inputs of the switch are connected respectively to the first and second outputs of the controlled generator, the third output of which is connected to the control input of the switch. Sources of information taken into account in the examination 1. USSR author's certificate number 34444, cl. G About G 7/16, 1971, 2.Kogan B, I. Electronic simulators and their application for the investigation of automatic control systems. Fizmatgiz, 1963, p. 236-238, rice, 126 (prototype). 0 / G