SU419921A1 - FREQUENCY-PULSE FUNCTIONAL CONVERTER - Google Patents

Description

one

The invention relates to the field of computing and can be used in computing devices processing frequency-pulse information.

A frequency-pulse functional converter with piecewise linear approximation of functions, the content of the interval determining block, the subtractive device, the multiplying-dividing block, the frequency-pulse tracking system, the AND and OR logic, and the sensor of sample frequencies are known.

A disadvantage of the known device is the low response rate due to the inertia of the T1 determination unit of the terval; the inertia of the frequency-impulse-tracking system used as a smoothing element of frequency information, which has a pronounced burst character; the low frequency of the " burst " due to the method of forming a portion of the approximating curve.

The aim of the invention is to increase the speed of the frequency-pulse function converter.

For this, it contains the generator of the controlled frequency, the blocks of preO: the code-voltage, the register and the third group of circuits "AND, the potential inputs of which are connected to the input of the converter, the pulse inputs

with the outputs of the reversible counter, and the outputs through a register are connected to the inputs of the first code-voltage conversion unit, the input of which

the second code-voltage conversion unit is connected to the output of the reference voltage source. The output of the nerve block code-conversion through the controlled frequency generator is connected to the second input

a reversible counter, and the code steps of the second code-on transform unit, the pitch is connected to the outputs of the interval determining unit.

The drawing shows the proposed scheme

pulse frequency function converter.

We propose that my frequency-pulse functional converter consists of the interval definition block (BON) 1, which consists of

which includes a frequency converter in the code (PChK) 2 and decipher 3; multiplying auxiliary unit (MDB) 4, its input 5; sensors of reference frequencies 6 and 7, three groups of circuits "H 8-10 and three circuits" OR 11-13;

reversible counter (PC) 14; register 15,

two blocks to convert code-voltage

16 and 17; frequency generators 18

and reference source “Apr 19.

In the proposed device, the input Fx (t) is connected to the inputs of LFC 2 BOI 1. Outputs

FCI 2 is connected to the inputs of the decoder of 3 approximation sites. The outputs of the decoder 3 are connected to potential inputs of two groups of circuits “And 8 and 9, the pulse inputs of which are connected to the outputs of the sensors of the reference frequencies 6 and 7, the inputs connected to the buses of the reference frequency components. The outputs of the two groups of circuits "And 8 and 9 through ne, ryvuyu and second circuits" OR AND and 12 are connected to one of the inputs of MDB 4 connected by other inputs to the frequency reference bus 20 and input 5 of the device, and to the input of the third circuit "OR 13 the second input of which is connected to the output of MDB 4, and the output to the summing input of PC 14. The outputs of the latter are connected to the notional inputs of the third group of circuits “And 10, the pulse inputs of which are connected to the input of the device, and the outputs to the inputs of the register 15, the outputs connected to the inputs of the first unit. code-voltage conversion 16. The reference voltage input of the conversion unit code-voltage 16 is connected to the output of the second conversion unit code voltage 17, the input voltage of the reference voltage connected to the output of the source of the G-19 and 19.

In the proposed device, a piecewise linear approximation of the function z f (x) is realized.

Model, Iruyush, and the functional dependence (The converter has the form

F, (t) N, .- F (t) + F ,, (1)

Since the comparison of the input frequencies of the forward and reverse link circuits, according to the principle of operation of the device, should be carried out in the period of the input frequency Fx (t), it is more convenient to model the dependence as an expression

F (i) -T (i), + F ,. .r.. (i), (2)

which is implemented in the proposed frequency-pulse functional converter.

In this case, in each period Tx (t), equality (2) is checked. In case of its violation in PC 14, a new code is formed during the period, the value of which differs from the value of the code in output register 15 by the value

± - a, + T, (0 - g (O (t) (3)

At the end of the period Tx (t), the contents of PC 14 are transferred to register 15, changing its code value by ± iA; V, which is equivalent to the sum of the previous value of the code with the correction value.

The input frequency Fx (t) is fed to the input of the FCI 2, which fixes the binary code Nx (t), Proportional Fx (t). A converter based on the Loraz | p principle of frequency weighting or a function-coding device can be used as an ICC.

PCF 2 is associated with a decoder 3, the structure of which is determined by operating the X-axis into approximation areas (uniform or regular). Output signals

decoder 3 with the help of the circuits "And 8 and 9 and" OR 11 and 12 is controlled by switching the reference frequencies from the outputs of the sensors of the reference frequencies 6 and 7, which simulate the parameters of the i-ro approximation area.

Sensors of exemplary frequencies 6 and 7 form o.fraction frequencies by summation.

nor frequency binary components

2

(s / g-bit frequency divider) with the corresponding times, a series of C coefficients in the OR, 11 and, 12 schemes.

If equality (2) is violated in PC 14, at the end of the period Tx (t), a new code is formed, which differs from the code in register 15 by

rtAA value. The PC 14 code impulses the frequency Fx (t) transferred to register 15, and the formation of the frequency F2 (t) in the next period Txit takes into account ± AN. The time of processing the mismatch G in the initial parameter depends on the number of bits of the FCL 2 BOI .1 and the accuracy of operation of the analog blocks and, in the best case, is the value of one perlot Tx (t). The proposed frequency-pulse converter provides a fairly high instantaneous accuracy (il-0.1%). In this case, the instantaneous accuracy is understood as the stability of periods of the output frequency. Static integral error - the error of the result obtained by averaging lies in the range of 0.01-0.005%.

Subject invention

A pulse frequency function converter containing an interval determining unit, the input of which is connected to the input of the converter, and the outputs are connected to the potential inputs of two groups of circuits

the pulse inputs of the first group of circuits And are connected to the reference frequency buses via the primary frequency & frequency frequencies, and the pulse inputs of the second group of circuits I through the second sensor of reference frequencies; the outputs of the circuits “AND the first group through the first circuit“ OR are connected to the first input of the multiplying-dividing block, the second input of which is connected to the input of the block for determining the intervals, and the third to the bus of the reference

frequencies; the outputs of the circuits “AND the second group through the second circuit“ OR are connected to the first input of the third circuit “OR, to the second input of which the output of the multiplying-dividing block is connected, and the third

An OR circuit to the first input of a reversible meter, characterized in that it contains reneipaTop controlled frequency, code-voltage conversion units, a register, and a third group of AND circuits, the potential inputs of which are connected, to improve speed. with the converter input, the pulse inputs with the reversible counter outputs, and the outputs through a register are connected to the inputs of the first code-voltage conversion unit51, the reference voltage input of which is connected to the second voltage conversion unit

the output of the reference wap source; the output of the first conversion unit is code-voltage through a controlled frequency generator connected to the second input of the reversible counter, and the code lines of the second code-voltage conversion unit are connected to the outputs of the interval-determining unit.