Converters of sum/differnce of codes to frequency
Abstract
Converters of the sum/difference of codes to frequency are considered and the principle of building such converters is explained. The basic device is a codetofrequency converter, an extension of a discrete phase inverter into a digital synthesizer with summation of pulse sequences. A 6bit converter built with series K155IYe8 integrated microcircuits is already available and several of them can be combined for a larger number of bits. the sum of any number of binary codes A(1),...,A(P+0) can then be converted to frequency by direct simmation of the frequencies of corresponding pulse sequences. Because frequency is a nonnegative quantity, the sum of codes corresponding to a frequency sum. In the case of three codes, accordingly, A(3) A(1) + A(2) where A(3) is a code corresponding to the subtrahend frequency. Several logic schemes are possible for realization of such converters. The frequency spectra of their output signals contain various features, however, which need to be further examined.
 Publication:

USSR Rept Electron Elec Eng JPRS UEE
 Pub Date:
 March 1985
 Bibcode:
 1985RpEEE....R..11S
 Keywords:

 Biternary Code;
 Digital Systems;
 Frequency Converters;
 Signal Processing;
 Frequency Synthesizers;
 Integrated Circuits;
 Transmitters;
 Communications and Radar