PLL-controlled oscillator

Details PLL-controlled oscillator PLL-controlled oscillator

2005-03-22

2005-03-22

Mis, David (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

C331S069000, C331S070000, C331S10800D, C331S10800D, C331S158000, C331S176000

Reexamination Certificate

active

06870430

ABSTRACT:
A PLL (Phase-Locked Loop)-controlled oscillator has a temperature-compensated crystal oscillator having a quartz crystal unit, an oscillating circuit connected to the crystal unit, and a temperature compensating mechanism for generating a temperature compensating voltage for compensating for frequency vs. temperature characteristics of the crystal unit, and a voltage-controlled oscillator having an LC oscillating circuit, for being controlled by a PLL using the temperature-compensated crystal oscillator as a reference signal source. The temperature-compensated crystal oscillator has circuit components except for the crystal unit, the circuit components and the voltage-controlled oscillator being integrated in a one-chip IC. The one-chip IC and the crystal unit are integrally combined with each other in the PLL-controlled oscillator.

REFERENCES:
patent: 6703877 (2004-03-01), Kobayashi et al.
patent: 2000-269106 (2000-09-01), None

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