SU741284A1 - Functional signal generator - Google Patents

Description

54) FUNCTIONAL SIGNAL GENERATOR

The invention relates to radio engineering and can be used in control systems, information systems. A step-shaped function voltage generator is known, which contains a code-voltage converter, K.CHOCH, a reference generator, a control block, a decoder 1. A disadvantage of the device is a step-like output waveform. The closest technical solution is a function signal generator containing a block control, reference frequency generator, code-frequency converter, adder-calculator, code-voltage converter, integrator, inflection point decoder, and the output of the reference frequency generator is Inen with a signal input of a code-frequency converter, the output of which is connected to the counting input is a torus a-subtract, the output connected to the first input of the decoder of the inflection points, and the output of the transformer of the code-voltage is connected to the signal input of the integrator 2 . However, this device is characterized by insufficient signal reproduction accuracy. The purpose of the invention is to improve the signal reproduction accuracy. The goal is achieved by the fact that a functional signal generator containing 6. POK control, a reference frequency generator, a code-frequency converter, a summator-subtractor, a code-voltage converter, an integrator, a decoder of inflection points, and the output of the reference frequency generator is connected with the signal input of the code-frequency converter, the output of which is connected to the counting input of the sum, the torus subtractor, the output connected to the first input of the decoder of the inflection points, and the output of the code-voltage converter is connected to A quantizer consisting of a code-frequency converter and a switch connected in series are entered to the integrator's input, a switch, the offset code point, the output of which is connected to the information input of the adder-subtractor, the output of which is connected via the quantizer key by the input of the converter quantizer voltage-voltage where the output of the reference frequency generator is connected to the signal input of the code-frequency converter transformer, the switch output is connected to the integrator control input, the output of the point decoder is iba .The inputs connected to the control unit, the outputs of which are connected to the input of a code-frequency converter, a control input of the adder-subtractor, the first and second input shift key code, to the input of the decoder inflection points, entry code-frequency converter and the quantizer input switch.

The drawing shows a diagram of the device.

The device circuit contains a control unit 1, a reference frequency generator 2, a code-frequency converter 3, an adder-subtractor 4, a decoder of 5 inflection points, a code-voltage converter 6, an integrator 7, a quantizer 8, a code-frequency converter 9, a quantizer, key 10 the quantizer, the integrator switch 11 and the offset code key 12.

The generator works as follows.

Information from a digital computer, coming to control unit 1, determines the type of reproducible function. All functions are approximated by a broken curve with the required accuracy. The reference frequency generator 2 is connected by its output to the signal inputs of the code-to-frequency converters 3 and 9, where the applied frequency is converted according to the codes supplied. on the information inputs of these converters,

At the moments of time determined by the beginning of each cut-off with an approximate broken decoder of 5 points of inflection, from block 1 of control to decoder 5, the value of the code for changing parameters of the linear section is fed and stored. At the same time points from block 1 of control the summing input of the adder-subtractor 4 is supplied with the value of the bias voltage code i E, and the information inputs of the converters 3 and 9 are code-frequency and to the input of the switch 11 of the integrating circuit, the codes defining the pulse counting frequency s output from the converter 3 frequency-code on the count input of the adder-subtractor 4; the period T of quantizing the transmission of information from the adder-subtractor 4 to the input of the converter b of the code-strain through the key 10 of the quantizer; integrator time constant f 7 (constant time control T is implemented via switch 11)

The counting frequency f, applied to the counting input of the adder-subtractor 4, is determined from the ratio dM

dt

Y2

Where

linear gradient

ka approximable function;

d - the price of the younger bit

converter code-voltage, V,

When forming any linear section, the parameters are ± E (magnitude of the bias voltage code, com, com), f (pulse frequency at the input of adder-subtractor 4), T (period of quantization of information transfer from adder-subtractor 4 into converter 6, code-voltage ), t (the time constant of the integrating circuit) are determined by the control unit 1 by supplying the corresponding codes to the subtractor 4, the frequency converters 3 and 9, the integrator switch 11 and must satisfy the following relation

. | sE | x. (,) - T, iK / 2;

or

U (

-Ti

-i-e

The first factor under the conditions (2), (3) denotes the algebraic sum

offset voltage codes applied to adder-subtractor 4 at the beginning of each linear portion of the reproduced function.

The left part of equality (2) is the increment of the L. signal at the output of the integrator 7 per

period T when applying a bias voltage to it / equal to IHE UL-, and the right part is increment q of the signal supplied at the end of each period

T quantizing from the output of the converter b code-voltage to the signal input of the integrator 7,

Thus, during the formation of the linear section of the reproducible function. At the beginning of each period T, a constant bias voltage is established between the signal input and the output of the integrator 7, equal to SE 1.L.

When Is E I D 2 and in each period T of the time quantization, integration occurs at the initial part of the exponent, which ensures high linearity of the formed sections and accuracy of the reproduction of the function. .

If the code in adder-reader 4 coincides with the parameter change code recorded in the decoder 5 inflection points, which indicates

Claims (2)

. the end of the linear section formation, the decoder 5 will issue a parameter change signal to the control unit 1 the value of the codes and signals output by the control unit 1 on the 3 and 9 code-frequency converter, the key of the bias voltage code 12, the adder-subtractor 4, the decoder 5 and the switch 11 is changed, and the reproduction of the next linear portion of the function begins. Claims of the Invention A function signal generator comprising a control unit, a reference frequency generator, a code-frequency converter, a totalizer-subtractor, a code-voltage converter, an integrator, a decoder of inflection points, the code-reference code generator being connected to the code-frequency converter signal input, the output of which connected to the counting input of the subtractor, the output connected to the first input of the decoder of the inflection points, and the output of the code-voltage converter is connected to the signal input of the integral Ator, characterized in that, in order to improve the reproducibility of reproducing aaUBfl signal, it includes a quantizer consisting of a serially connected converter, a code-frequency and a key, a switch, a key of the offset code, the output of which is connected to the information input of the subtractor the output of which is connected to the converter input via the quantizer code-voltage via the quantizer key, the output of the reference frequency generator connected to the signal input of the quantizer code-frequency converter, the output of the switch connecting It is connected to the control input of the integrator, the output of the inflection point decoder is connected to the input of the control unit whose outputs are connected to the code-frequency converter input, to the control input of the SUMMER adder, to the first and second inputs of the offset code key, to the input of the inflection point decoder, Converter code-frequency quantizer and switch input. Sources of information taken into account in the examination. 1. USSR author's certificate number 379975, cl. H 03 K 4/02, 1971. 2. USSR author's certificate number 247634, cl. G 06 G 7 / 26,18.03.78 (prototype).