Low noise high speed frequency synthesizer employing a learning

Details Low noise high speed frequency synthesizer employing a learning Low noise high speed frequency synthesizer employing a learning

1992-07-17

1994-04-19

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

331 14, 331 16, 331 17, 331 25, H03L 7189

Patent

active

053049560

ABSTRACT:
Disclosed is an apparatus and method for high speed tuning to a commanded frequency using a low noise high speed frequency synthesizer employing a learning sequence. A phase-locked loop (PLL) generates the commanded frequency. High speed tuning circuitry high speed tunes the PLL to the commanded frequency. Thereafter, the high speed tuning circuitry is substantially isolated from the PLL, while learning circuitry is employed to learn a correction signal which will enable subsequent more accurate high speed tuning to the commanded frequency.

REFERENCES:
patent: 4410860 (1983-10-01), Kipp et al.
patent: 4511858 (1985-04-01), Charavit et al.
patent: 4980652 (1990-12-01), Tarusawa et al.

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