Method and apparatus for frequency control

Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation

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455255, H04B 7185

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active

06081702&

ABSTRACT:
The invention concerns a method and apparatus for providing frequency control of an oscillator circuit. The apparatus includes an oscillator (9), an error estimator (10) f.sub.r producing a set of error estimates and a median filter (11) for producing a median value from the set of estimates. The median filter (11) is connected to the oscillator (9) which is responsive to the median value to vary its frequency thereby reducing the error.

REFERENCES:
patent: 4921467 (1990-05-01), Lax
patent: 5115515 (1992-05-01), Yamamoto et al.
patent: 5170492 (1992-12-01), Moller et al.
patent: 5574984 (1996-11-01), Reed et al.
patent: 5748682 (1998-05-01), Mobin

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