Systems and methods with reduced reference spurs using a...

Details Systems and methods with reduced reference spurs using a... Systems and methods with reduced reference spurs using a...

2006-12-19

2009-06-16

Pascal, Robert (Department: 2817)

Oscillators

Solid state active element oscillator

Transistors

C331S158000, C331S183000

Reexamination Certificate

active

07548128

ABSTRACT:
Systems and methods are provided. In this regard, a representative system incorporates a crystal oscillator circuit and a digital automatic level control circuit. The digital automatic level control circuit is operative to: convert an oscillation amplitude of the crystal oscillator circuit to a proportional DC voltage; convert the DC voltage to a corresponding digital code representation; and adjust bias current and oscillator loop gain such that a desired oscillation amplitude is set.

REFERENCES:
patent: 6025757 (2000-02-01), Tsukagoshi et al.
patent: 7098753 (2006-08-01), Dumitrescu et al.
patent: 7123113 (2006-10-01), Brennan et al.
patent: 7292114 (2007-11-01), Greenberg
patent: 7332979 (2008-02-01), Connell et al.
patent: 2006/0071729 (2006-04-01), Cetin et al.

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