Frequency scanning receiver permitting quick PPL setting

Details Frequency scanning receiver permitting quick PPL setting Frequency scanning receiver permitting quick PPL setting

2005-11-22

2005-11-22

Le, Lana (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S255000, C455S161100, C455S257000

Reexamination Certificate

active

06968165

ABSTRACT:
A frequency scanning receiver minimizes the time needed for setting the frequency of a phased lock loop of a first local oscillator. The frequency scanning receiver is configured so that when the reference frequency of the PLL of the first local oscillator has been set at a high frequency, and the frequency error is less than the second IF, the frequency error is controlled to be zero by the control circuit switching the frequency of a second local oscillator or third local oscillator to an appropriate frequency using an output of a frequency discriminator.

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patent: 6775317 (2004-08-01), Yokota
U.S. Appl. No. 10/139,944, filed May 6, 2002.

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