Analog zero if FM decoder and embodiments thereof, such as...

Details Analog zero if FM decoder and embodiments thereof, such as... Analog zero if FM decoder and embodiments thereof, such as...

2007-04-24

2007-04-24

Mehrpour, Naghmeh (Department: 2617)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C370S420000, C379S316000

Reexamination Certificate

active

09476092

ABSTRACT:
A method and system for directly down-converting FM signals to demodulated baseband information signals that can be used to directly down-convert analog FM signals and digital FM signals to demodulated baseband information signals. In an embodiment, the method includes aliasing an FM signal at an aliasing rate substantially equal to the frequency of the FM signal or substantially equal to a sub-harmonic thereof; adjusting the aliasing rate in accordance with frequency changes on the FM signal to maintain the aliasing rate substantially equal to the frequency of the FM signal, and outputting a demodulated baseband information signal. The method optionally includes compensating for phase delays and/or other characteristics of the loop in order to maintain bandwidth and stability for the loop.

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