SU947870A1 - Functional frequency converter - Google Patents

Description

(54) FUNCTIONAL FREQUENCY CONVERTER

The invention relates to automation and computing and can be used to build specialized devices that implement non-linear transformations of information specified in the form of a pulse frequency.

Known functional Converter containing the decoder, encoders, distributor, generator of linear functions and accumulating adder 1.

The disadvantages of this converter are the limited scope and relative structural complexity.

A function frequency converter is also known, comprising an input driver, a reference frequency generator, a function generator, a key, a counter, a memory register, and an output code converter 2.

The disadvantage of this converter is the reduced accuracy of the reproduction of functions.

A functional frequency converter is known, which contains a memory register connected by outputs to the inputs of a digital-analogue converter, an electric generator, a square pulse shaper, whose input is an input of a functional frequency converter, and an output connected to the input of the first differentiating element and to the first input of the prohibition element, connected by the second input to the output of the clock generator, and the output to the counting

10 to the counter input, the output of the first differentiating element being connected to the input of the buckle element and to the input of the NO element connected to the zeroing input of the counter and

15 to the input of the second delay element connected by the output to the first input of the key connected by the output to the input of the output analog storage unit, and the output of the first delay element is connected to the control input of the memory register, the digital-to-analog converter is connected at the input of the nonlinear impulse generator o the voltage connected by the output to the second input of the key 3.

25

A disadvantage of the known device is the reduced accuracy of reproduction of functions.

The purpose of the invention is to improve the accuracy of reproduction of functions.

thirty

The goal is achieved by the fact that a functional frequency converter containing a memory register connected to the outputs. inputs of a digital-analog converter, a square pulse shaper, whose input is an input of a functional frequency converter, and the output is connected to the input of the first differentiating element and to the first input of the inhibit element connected by the second input to the output of the clock generator, and the output to the counting to the input of the counter, the output of the first differential element of the enclosing element, connected to the input of the delay element, a second differentiating element, a decoder of sections, a decoder rotation and the adder connected to the first group of information inputs to the outputs of the adder and to the information inputs of the memory register, the control input to the output of the second differentiating element, and the zero input to the output of the delay element and to the zero input of the counter, the outputs of which are connected through the decoder sections with the inputs of the decoder increments, and the output of the generator of clock pulses connected to the input of the second differentiating element output. the first differentiating element is connected to the control input of the memory register, and the output of the D / A converter is the output of the function frequency converter.

The drawing shows a block diagram of the proposed functional frequency converter.

The frequency generator contains a rectangular pulse shaper 1, the input of which is the input of a functional frequency converter, and the output is connected to the input of the first differentiating element 2 and the first input of the inhibit element 3 connected by the second input to the output of the 4 clock pulse generator, and the output to the counting input counter 5, the output of differentiating elem. 2 is connected to the input of the delay element 6 and from the control of the gazym input of the memory register 7 connected to the inputs of the digital-to-analog converter 8 , the output of which is the output of the functional frequency converter. The outputs of the counter 5 through the decoder 9 sections are connected with. the inputs of the decoder 10 increments performed, for example, on the elements OR 11. The outputs of the decoder 10 are connected to the first group of information inputs of the adder 12 connected by the second group of information inputs to the outputs of the adder 12 and to the information inputs of the register 7, the control input with the output of the second differentiating

element 13, and the entry zeroing - with the release of the element b locks and c. input zero counter 5. The output of the generator 4 is connected to the input of the differentiating element 13.

0 Functional frequency. Converter works as follows.

At the output of shaper 1, to the input of which a signal of the converted frequency f is received, a sequence of square pulses is formed. Generator 4 generates. sequence of high frequency clock pulses fj ,. Using the prohibition element 3, the passage of clock pulses to the counting input of the counter 5 is permitted in the positive half-period of the input frequency f,. The code accumulated in the counter 5 is fed to the inputs of the decoder of 9 sections. Depending on the values of this code, a signal appears on each of the outputs of the decoder of 9 sections, which carries information about the number of the approximation area of the nonlinear function.

The number of AN pulses received in counter 5 at each i-th approximation area is determined by the ratio

dm, 1

fo

f -J (

where f.

input frequency corresponding to the subsequent {1 + 1) -th approximation area.

Depending on the number of the plot of approximation, at the outputs of the decoder of 10 increments, an increment code is established, corresponding to a curve of the characteristic at a given

plot, and is fed to the first group of information inputs of the adder 12, and

.-one

ni

li is the weight of the lower bit of the digital-to-analog converter 8.

At the output of the differentiating element 13, narrow pulses are formed, corresponding to the leading edges of the pulses of the generator 4, and are fed to the control input sum 12,

permitting the operation of adding codes located on the first and second groups of its information inputs. The adder 12 is in the mode of accumulation of ksschov arriving at the first

Claims (3)

group of its information inputs. By impulses formed by the differentiating element. 2, at the time corresponding to the back edges of the pulse square of the imaging unit 1, the addition result is written from the adder 12 to the memory register 7. The resulting code is converted by converter 8 into an analog output signal. The pulses from the output of the differentiating element 2 also pass through the delay element 6 and set the counter 5 and the adder 12 to the zero state, preparing the functional frequency converter for the next cycle of operation. Thus, the proposed functional frequency converter in comparison with the known by using digital elements allows to increase the accuracy of reproduction of functions, as well as, in the case of performing the decoder 10 increments on OR elements with switched inputs, to simplify tuning for a given type of reproduced function. A functional frequency converter comprising a memory register connected by outputs to the input of a digital-analog converter, a square pulse driver whose input is an input of a functional frequency converter and the output connected to the input of the first differentiating element and the first input of the prohibition element connected by the second the input to the output of the clock pulse generator, and the output to the counting input of the counter, the output of the first differentiating element being connected to the input ohm delay element, characterized in that, in order to improve the accuracy of reproducing functions, a second differentiation element, a parcel decoder, a decoder pdf) and an adder, connected by the first group of information inputs to the outputs of the decoder of increments, the second group of information inputs, to the outputs of the adder and the information inputs of the memory register, the control input to the output of the second differentiating element, and the zeroing input to the output of the delay element and to the input of the zero zero A sensor whose outputs are connected via a decoder of sections to the inputs of an increment decoder, the output of the clock generator is connected to the input of the second differentiating element, the output of the first differentiating element is connected to the control input of the memory register, and the output of the digital-to-analog converter is the output of a functional frequency converter . Sources of information taken into account in the examination 1. USSR author's certificate №463961, cl. G 06 F 1/02, 1972. 2. Authors certificate of the USSR 486326, cl. G 06 G 7/26, 1973. 3. Authors certificate of the USSR 636632, cl. G 06 G .7 / 26, 1976 (prototype).