Continuously tuneable frequency steerable frequency synthesizer

Details Continuously tuneable frequency steerable frequency synthesizer Continuously tuneable frequency steerable frequency synthesizer

1992-10-09

1993-11-30

Grimm, Siegried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

331 25, 331 27, 332127, H03L 7085

Patent

active

052669076

ABSTRACT:
A frequency locked loop frequency synthesizer is comprised of a loop including a voltage controlled oscillator, a phase lock locked loop frequency detector, a divide by N counter and a low pass loop filter. A steering voltage is applied to the loop filter to produce a desired frequency or frequencies. The frequency lock loop frequency synthesizer drives the voltage controlled oscillator frequency to be N times the reference frequency. The frequency lock loop synthesizer inherently has 90 degrees less loop phase shift than a conventional phase lock loop. Additionally, the frequency lock loop frequency synthesizer provides a highly accurate, continuously tuneable, frequency synthesizer that includes a linear frequency detector in the frequency lock loop.

REFERENCES:
patent: 4119952 (1978-10-01), Bosselaers
patent: 4587496 (1986-05-01), Wolaver
patent: 4801894 (1989-01-01), Garner
patent: 4952888 (1990-08-01), Izumi

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