Oscillators – Automatic frequency stabilization using a phase or frequency... – Plural oscillators controlled
Patent
1999-03-02
2000-12-05
Pascal, Robert
Oscillators
Automatic frequency stabilization using a phase or frequency...
Plural oscillators controlled
331 14, 455260, 455265, H03L 700
Patent
active
061572608
ABSTRACT:
A receiver includes a main loop (222) having a main VCO (210) and a secondary loop (224) having a secondary VCO (216). The receiver momentarily phase locks an incoming RF signal (228), and then samples and stores a correction voltage (240) being applied to the main VCO (210). The main loop (222) is then put into a non-phase locked mode of operation and the stored correction voltage is applied through a receive automatic tuning circuit (218) to the main VCO (210) for the duration of the incoming RF signal (228). This effectively calibrates the LO frequency (230) of the receiver to the incoming RF signal frequency (228).
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Kehler, Jr. Walter H.
Tilley Keith A.
Zele Rajesh H.
Doutre Barbara R.
Glenn Kimberly E
Motorola Inc.
Pascal Robert
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