SU536495A1 - Functional converter - Google Patents

Description

(54) FUNCTIONAL TRANSFER

The invention relates to computing and can be used for functional modeling and in information and measurement systems. The known functional converter, which reproduces the functions in the form of a polynomial, contains integrators, zero-organs, keys, pulse distributor, calibrated pulse generator and reference voltage source 1. Its disadvantages include the presentation of output information in the form of frequency or period, the impossibility of modeling p Yes, with fractional exponents, the dependence of the adjustments of the coefficients of the polynomial members, the impossibility of reproducing the positive and negative coefficients of the polynomial members both limited accuracy and speed. Also known is a functional converter containing an adder, the inputs of which are connected to the output of a diagonal floor, exponential blocks, inverters, scale amplifiers and a voltage source 2. Such a converter is characterized by limited speed and accuracy, lack of universality, since the output can be obtained only in voltage, and circuit complexity as the degree of the polynomial increases. In order to improve speed, the proposed converter contains a logarithm block, the output of which is connected to the inputs of exponential blocks through appropriate scale amplifiers, the inverter input, the output of the reference voltage source and the outputs of all exponential blocks are directly connected to the inlets of the field. The drawing shows the scheme of the proposed Converter. The converter contains a logarithm block 1, the output of which through large-scale amplifiers 2, 2, ..., 2 is connected to the inputs of exponential blocks. Exponential 3 outputs

3-1 blocks

directly and through

T1

4 inverters are connected to the input

Ti 1

give the diagonal field 5. The outputs of the diagonal field 5 are connected to the inputs of the adder6 The input of the logarithm unit 1 is connected directly and through the inverter 7 to the input of the dialer field 5. The source of the reference voltage 8 directly and through the inverter 9 is connected to the dialer field 5

The proposed device operates as follows.

The input signal X is fed to the logarithm 1, the output of which is the signal t X. This signal is fed to large-scale amplifiers 2 - 2, the outputs of which receive signals

proportional to K, 2 X ,,) X

(where k, .., k are the conversion factors of the amplifiers 2) The signals from the outputs of the scale amplifiers 2 are sent to exponential blocks 3 - 3,

on the outputs of which signals appear, k, enx, K ",

The signals from the outputs of the exponential blocks 3 together with the input signal X and the reference XQ through the dial pad 5 (directly or through inverters 4.7 and 9 are fed to the inputs of the adder 6, the output of which produces a signal:

.

to.

X ± ..,

(Xta - -% ..

a - large-scale

where a, a, a, .. coefficients of the adder 6;

XQ is the voltage source of the reference signal,

The proposed converter allows to reproduce a polynomial with any values of the exponents (including fractional and for any waveform (for example, analog, digital, analog-digital, digital-analog, frequency, temporal).

Claims (2)

1. USSR Author's Certificate No. 419912, M. Knf G06G7 / 26, 1972, 2. Smolov VB Analog computers, Higher school, 1972, p. 253 (prototype).