SU773927A1 - Method and device for converting pulse-frequency signal into code - Google Patents

Description

one

The invention relates to computing and can be used in the construction of high-performance pulse-frequency computing devices and frequency-code converters.

. A known method for converting a frequency-pulse signal into a code is based on shaping a pulse duration that is a multiple of or equal to the period TX of the measured frequency PX, and quantizing this duration to an exemplary time interval t with simultaneous coding of the result 1.

The disadvantage of this method is low speed.

A known method for converting a frequency-pulse signal into a code is based on the principle of successive comparison of the input frequency and its residues with the corresponding values of the reference frequencies 2.

- The disadvantage of the method is low conversion speed.

The purpose of the invention is to increase speed.

This goal is achieved by the fact that in the method of converting a pulse frequency signal into a stake based on the principle of successive comparison of the input frequency and its residuals with the corresponding values of the reference frequencies, the input signal is divided into P parts, each of the parts, except for the first, multiplies , the part of the input signal containing the high-frequency components is converted into a code by the method of 10-by-bit weighting, the remainder is intelligently subjected; the high-frequency part of the multiplied remainder of the input the signal is converted by the method of bitwise weighting

15 into a code, form a second residue, which is subjected to multiplication, the high-frequency part of the second multiplied residue is converted into a code by the method of bitwise weighting followed by extracting the third residue, which is also subjected to multiplication, etc., the multiplied P 1th residue is converted by the weighting method into a code.

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Claims (2)

A device for implementing the method comprises P frequency-code converters connected in series, each of which, except the last, contains a bit-weighted converter, the first input of which is connected to the first input of the balance block, and the input terminal of the frequency-code converter, the second input is connected with the output of the weighting converter; the third input is connected to the terminal of the reference frequency source c; the output through the frequency multiplier is connected to the output terminal of the frequency converter count the second and third outputs of the frequency multiplier is connected to the reference source terminals, and the last frequency-code converter is made on the variable-weighted converter The drawing shows the electrical circuit of the device, the device contains P frequency-to-frequency converters 1, which consist of two weighted converters 2, residual extraction units 3, 4 frequency multipliers. Converters 2 have an input and one output bus. The first input bus receives pulses of the measured frequency F, the other buses receive pulses of the reference frequencies F, Fj, Fo,,. . . , Suppose that the device is divided into four transducers 1, the multiplication coefficients of multipliers 4 are equal: n; 4, t 16, m 32. Since with the help of multipliers of 4 frequencies, the frequency at their output is increased by 16 times, the frequency dividers in all blocks 3 have three bits. The number of bits of converters 2 is 9, 2, 4 and 5, respectively. Assume that the input frequency has changed in the form of a jump from zero to 1,023,476 Hz, the code M of the first converter will generate the code M 1100111112. After the time C 0.65 m, block 3 will form an impulse sequence GROWTH 1524 1c. At the output of the first multiplier 3 FX2 GROWTH, - and 6096 HZ. In the code bus of the second transducer 2, the code G2 01 is generated. At the expiration of T 0.5 ms, the second block 3 will generate a pulse sequence of FOCYQ 2000 Hz. At the output of the second multiplier 4 -1 32000 Hz. In the code bus of the third converter 2, the code No, llll. After ti-0.77 ms of the third block 2 will form a pulse sequence FOCT 1284 Hz. In the course of the third multiplier you get 4 Pk4.,) 41088 Hz. In the code bus of the fourth converter 2, the code N. OOlOla is formed. The time of the fourth converter TG4. 0.024. - Thus, the result code is Ny OOlQlllllOlllOOlllll ,. The measurement time of N2 is T = 1.94 ms. An increase in the number of frequency multipliers leads to a further increase in conversion speed. Claim 1. A method for converting a pulse frequency signal into a code based on the principle of sequential comparison of the input frequency and its (residues with the corresponding values of the reference frequencies, is also distinguished by the fact that, in order to increase the conversion speed, the input signal is divided into P parts, each of the parts, except for the first one, is multiplied; a part of the input signal containing high-frequency components is converted into a code using a weighted weighting method; a residue is extracted, which is subjected to In this case, the high-frequency part of the multiplied remainder of the input signal is transformed according to the method of bitwise weighting into a code, a second residue is formed, which is multiplied the remainder is transformed according to the method of bit-wise weighing in. 2. A device for carrying out the method according to Claim 1, containing P frequency-code converters connected by a sequence Each of them, except the last one, contains a variable weighting converter, the first input of which is connected to the first input of the remainder block, and the input terminal of the frequency-code converter, the second input is connected to the output of the parallel weighting converter, the third input is connected to the source terminal -. the reference frequency is nicked, and the output through the frequency multiplier is connected to the output terminal of the frequency-code converter, the second and third inputs of the frequency multiplier are connected to the terminals of the reference frequency sources, and the last frequency-code converter is provided on the parallel-weighted converter. Sources of information taken into account in the examination 1. P. Ornatsky Automatic measurements and instruments. Kiev, Vishcha school. Head publishing house, 1973, p. 522. 2. USSR author's certificate number 341160, cl. H 03 K 13/20, 1973 (prototype). 7 V