Phase locked loop demodulator with gain control

Details Phase locked loop demodulator with gain control Phase locked loop demodulator with gain control

2003-10-09

2008-09-02

Kinkead, Arnold (Department: 2817)

Demodulators

Frequency modulation demodulator

C329S325000, C329S318000, C331S016000

Reexamination Certificate

active

07420409

ABSTRACT:
The invention relates to a demodulator to demodulate frequency-modulated signals FM including a phase locked loop PLL including at least a phase detector, a loop filter and a voltage controlled oscillator function VCO′, characterized in that said voltage controlled oscillator function VCO′ has modifiable gain. The invention allows to eliminate drawbacks presented by the conventional use of a complex gain modifiable amplifier at the input of demodulated signal processing means. Application: demodulation of modulated signals: wireless phone, home network.

REFERENCES:
patent: 5369376 (1994-11-01), Leblebicioglu
patent: 5459653 (1995-10-01), Seto
patent: 0645891 (1995-03-01), None
Data Sheet, Integrated Circuits, UAA3515, 900MHz Analog Cordless Telephone IC, May 3, 2002, Product Spec. File under Integrated Circuits, IC17, Philips.

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