ES379323A1 - Carrier frequency generator - Google Patents

Abstract

A method for generating one or more carrier frequencies for carrier frequency equipment and, in particular, one or more carrier frequencies for secondary groups, by multiplying a standard frequency by filtering a harmonic from a series of high-frequency pulses, characterized because the harmonics are generated in a first multiplier (2) of a standard frequency supplied by a generator (1) and the 2n or 2n-1 harmonic, respectively, is filtered by means of a first bandpass filter (3); because from said filtered harmonic a train of sharp impulses having the repetition rate 2n Ω is then formed in a second multiplier (4); or (2n-1) Ω respectively, from whose acute pulse train the frequency m is filtered. 2m Ω or m (2n-1) Ω respectively, by means of a second bandpass filter (5) for the generation of the carrier frequency m Ω; because said frequency thus filtered is divided by the factor 2n or 2n-1, respectively, by means of a digital divider (6, 7 or 6 respectively) and because the train of square wave impulses thus obtained and which has a repetition frequency m Ω it is directly used as a desired carrier frequency and, if it precedes a division by an odd factor, it is converted to the mark to space ratio 1: 1 by means of a pulse sharpener, or because a sine wave as a desired carrier is obtained repetition frequency filtering m Ω by means of a third bandpass filter (8). (Machine-translation by Google Translate, not legally binding)