SU436361A1 - POSSIBLE-PERFORMANCE DEVICE - Google Patents

Description

one

The invention relates to the field of analog computing and electrical measuring equipment.

A multiplying-separating device containing adders controlled is known (AC signal to constant converter. Using this device, it is possible to transform into a stable electrical signal 1 the product of the ratio of the amplitudes of two periodic variable in-phase electrical signals with the same curve shape by the value of the third constant electric signal.

A disadvantage of the known device is that its correct functioning is possible only with strict synphase of both variable signals and the amplitude of the divisible, smaller amplitude of the divider.

In order to expand the dynamic range of the input voltages, the proposed device additionally contains threshold elements, controllable keys, a source of a reference signal, a controllable divider and a differential amplifier. A variable signal whose amplitude is a divider and (a PERMANENT signal is fed to two different Inputs of the first adder. The output of this adder is connected to the control circuit through the first control key. The variable signal whose amplitude is divisible is fed to the first input of the second adder. Bgo second input is connected to the output of the controlled divider, which is simultaneously the output of the device. The output of the second adder through the second threshold element is connected to the control circuit of the second control A direct divider input is connected to the reference signal source, and an alternating signal to a constant converter via separate controlled switches. The outputs of these converters are connected to the separate inputs of the differential amplifier. The differential amplifier control output is switched on the output of the differential amplifier. performing the device allows converting IB a constant signal to produce the ratio of the amplitudes of two periodic variable strengths to a constant signal with an arbitrary phase shift and amplitude ratio of both variable signals.

The drawing shows a block diagram of the device. The main units of the device are: adders 1 and 2, threshold elements 3 and 4, controllable switches 5 and b, alternating signal transducers to permanent 7 and 8, differential amplifier 9, controlled voltage divider 10 and source

reference signal 11. The proposed device converts the expression into a constant signal and according to the formula: .L. where B is the value of a constant electric signal; - scale factor of a periodically variable sipnal a (t) Al (t) Af (t + nT) (2) - scale factor of a periodically alternating signal c (f) Cl (t +), (3) T - period sig, naloB and with; t is the offset in B (the signal's belt is relative to the signal with. (2 The ratio, in accordance with (2) and (3), is the ratio of the maximum, minimum, average, or averaged values of the signals s and a. The value is constant This signal must satisfy the condition: - "max 5 -" min (4 The principle of the device is as follows. The variable signal (t) and the constant signal B are fed to two different inputs of the first adder 1. At its output, we get the signal Af { t), Due to the satisfaction of conditions (4), the curve of this signal adder intersects the axis of the obssiss. Similarly, the adder 2 is supplied with a variable signal c Cf (t +) and a constant signal Uo taken from the output of the controlled divider, which coincides in sign with the signal B. At its output we get the signal Cf ((+), where UQ is some arbitrary value constant At non-negative values of signals Af (t) + B and Cf (+) + ", the output signals of the threshold devices in each period for time 01 and 62 open the control keys 5 and 6, respectively, resulting in corresponding converters of an alternating signal in constant 7 and in The output signal of the source of the reference signal is 11. The output constant signals / output and the output signals of the variable-to-constant converters are defined by the formulas: // onQjfc -. () .RMTft where f / on is the value of the reference sypnal. Differential amplifier 9, the output voltage of which, according to (5) and (6), is paiBHo v.х9 fe- (out7- / out8) (v, - e,), (7) where k is the gain of the differential amplifier, control is the value of the output signal U of the controlled divider 10 until the output signals f / Bb: x7 I / O8 of the converters of the variable signal into a constant are compared, i.e., until the equality is fulfilled: conditions from the similarity of the curves should be: d (i) + B a (t) C (t - c) + U C (-t) But, according to (3), c (t-) Cf (t + -) Cf (t ). (10) Based on dependencies (2), (9) and (10) we find: Af (i) + B Af (f) Cf (f) + UB-f (t) which follows from Af (t) l From Formula (12) directly implies the formula (1). The subject of the invention is a multiplying-separating device containing two adders and two keys, the inputs which are connected to a source of reference signal, characterized in that, in order to expand the dynamic range of the input voltages, it contains two threshold elements, two converters of alternating voltage into a constant voltage. , a differential amplifier and a controlled divider of the array, with each threshold element connected between the output of the corresponding adder and the control input of the key, the output of each key through the corresponding The associated AC / DC converter is connected to a differential amplifier, the output of which is connected to the input of one of the adders via a controlled voltage divider.