Frequency synthesizer

Details Frequency synthesizer Frequency synthesizer

H - Electricity

04

B

365/5, 328/51

H04B 1/16 (2006.01) H01Q 1/42 (2006.01) H03J 5/02 (2006.01) H03L 7/06 (2006.01) H03L 7/18 (2006.01) H03L 7/197 (2006.01)

Patent

CA 1134081

- 26 - Abstract of the Disclosure In a frequency synthesizer with phase-locked loop in which the output signal from a voltage controlled oscillator is frequency-divided by a variable frequency dividing circuit and the frequency-divided one, together with a reference frequency signal, is applied to a phase comparator and the output signal from the phase com- parator is fed back to the voltage control oscillator, the variable frequency dividing circuit is comprised of a first variable frequency divider for frequency- dividing the frequency of the output signal from the voltage controlled oscillator into a l/K frequency, a second variable frequency divider for frequency- dividing the frequency of the output signal from the first variable frequency divider into a l/m frequency, and a rate multiplier which receives the output signal from the second variable frequency divider to produce Q pulses (Q is an integer between O to P-l where P is an integer) when receiving P input pulses, and to change the frequency dividing ratio K of the first variable frequency divider.

329949

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