Architecture for maintaining constant voltage-controlled...

Details Architecture for maintaining constant voltage-controlled... Architecture for maintaining constant voltage-controlled...

2008-05-02

2010-06-22

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C331S010000, C331S012000, C331S025000, C327S156000, C327S157000

Reexamination Certificate

active

07741919

ABSTRACT:
A voltage controlled oscillator and a method of operating a voltage-controlled oscillator are disclosed. The oscillator comprises a current controlled oscillator having a variable frequency current output, a first control path for generating a first control current having a first adjustable gain, and a second control path for generating a second control current having a second adjustable gain. A summer is provided for adding the first and second control currents to obtain a summed control current, and for applying the summed control current as an input current to the current controlled oscillator. A control sub-circuit is used for controlling the gain of the first control current as a function of a defined voltage on the second control path to maintain constant the gain of the current output of the current controlled oscillator over a given operating range of the current controlled oscillator.

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