VCO center frequency tuning and limiting gain variation

Details VCO center frequency tuning and limiting gain variation VCO center frequency tuning and limiting gain variation

2006-11-28

2006-11-28

Mis, David (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

C331S025000, C455S260000

Reexamination Certificate

active

07142062

ABSTRACT:
This invention describes a method for simultaneous precise center frequency tuning and limiting a gain variation of a voltage controlled oscillator (VCO) of a phase locked loop (PLL) of an electronic device (e.g., a communication device, a mobile electronic device, a mobile phone, etc.). The invention utilizes frequency measurements and arithmetical optimizations. More specifically, the invention implementation is based on an analysis which includes measuring a frequency of a VCO and calculating a gain of the voltage controlled oscillator (VCO) using a predetermined criterion. The key element for implementing said analysis is a control and arithmetic block. The present invention can be used in any radio architecture that requires limiting of the VCO gain variation and tuning its center frequency.

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