Voltage controlled oscillator band switching system

Details Voltage controlled oscillator band switching system Voltage controlled oscillator band switching system

2005-07-22

2009-10-27

Yun, Eugene (Department: 2618)

Telecommunications

Transmitter and receiver at same station

With a common signal processing stage

C455S264000, C455S188100

Reexamination Certificate

active

07610023

ABSTRACT:
An apparatus, method, and system for voltage controlled oscillator band switching are described. A band switching apparatus may include a reference generation and comparison module, a clock pulse generation module, and a counter and gating module. The reference generation and comparison module may generate a positive signal based on a comparison of a loop filter voltage associated with a voltage controlled oscillator to a maximum tuning voltage and a minimum tuning voltage. The clock pulse generation module may generate a clock pulse in response to the positive signal. The counter and gating module may disable band switching of the voltage controlled oscillator when a lock condition is detected and the loop filter voltage is between the maximum tuning voltage and the minimum tuning voltage. Other embodiments are described and claimed.

REFERENCES:
patent: 5952895 (1999-09-01), McCune, Jr. et al.
patent: 6094101 (2000-07-01), Sander et al.
patent: 6140882 (2000-10-01), Sander
patent: 6255912 (2001-07-01), Laub et al.
patent: 2003/0031267 (2003-02-01), Hietala

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