Controlled tracking of oscillators in a circuit with multiple fr

Details Controlled tracking of oscillators in a circuit with multiple fr Controlled tracking of oscillators in a circuit with multiple fr

1995-11-03

1997-03-11

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 16, 331173, 327147, 455 26, H03L 707, H03L 716

Patent

active

056105584

ABSTRACT:
An oscillator circuit (143) comprises a master phase-locked loop (PLL) circuit (202) that receives as input a first reference frequency signal (136) and generates a first clock signal (210) in response to an oscillator control signal (212). The oscillator circuit (143) includes a frequency sensitive slave circuit (206) having at least one frequency sensitive element (322) that is responsive to a tracking control signal (214) to generate a second clock signal (216). A tracking control circuit (204) is responsive to the oscillator control signal (212) for generating the tracking control signal (214). The tracking control signal (214) serves as a bias signal, and is connected to the frequency sensitive slave circuit (206) for achieving a fast power up sequence of the oscillator circuit (143).

REFERENCES:
patent: 4859970 (1989-08-01), Matsuo et al.
patent: 5075639 (1991-12-01), Taya
patent: 5231390 (1993-07-01), Mittel
patent: 5329251 (1994-07-01), Llewelyn
patent: 5414390 (1995-05-01), Kovacs et al.

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