Apparatus and method for operating a variable segment...

Details Apparatus and method for operating a variable segment... Apparatus and method for operating a variable segment...

2006-01-06

2008-09-23

Pascall, Robert (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

C331S016000, C327S156000

Reexamination Certificate

active

07427899

ABSTRACT:
This disclosure is directed to a communications device having a comparator that receives a signal associated with an output and produces a signal associated with a difference between a reference signal and the output signal. A loop filter is coupled to the comparator and accepts the difference signal. An oscillator is coupled to the loop filter and accepts the loop filter signal. It produces a signal with a frequency-characteristic in response. The oscillator can operate at a plurality of segments. A segment selection circuit is coupled to the oscillator. It determines which segment will be selected based upon a signal associated with an expected frequency characteristic, and outputs a signal associated with the particular segment. In response, the oscillator can then change its operational state to the particular segment. An amplification circuit is coupled to the oscillator, and produces an output signal with the particular frequency characteristic.

REFERENCES:
patent: 6078633 (2000-06-01), Shiotsu et al.
patent: 7154342 (2006-12-01), Munker et al.

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