Multi-mode transmit and receive PLL

Details Multi-mode transmit and receive PLL Multi-mode transmit and receive PLL

2011-01-11

2011-01-11

Vuong, Quochien B (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S075000, C455S552100, C375S294000

Reexamination Certificate

active

07869782

ABSTRACT:
A local oscillator (LO) signal generator that has a reference phase-locked loop (PLL), a receiver LO PLL and a transmitter LO PLL. A reference PLL is coupled to receive a reference clock input and to generate a reference PLL signal at its output, which then drives a receiver PLL and a transmitter PLL. The receiver PLL is coupled to receive the reference PLL signal and to use the reference PLL signal as its reference input to generate a receiver LO signal at its output. The transmitter PLL is coupled to receive the reference PLL signal and to use the reference PLL signal as its reference input to generate a transmitter LO signal at its output.

REFERENCES:
patent: 5448763 (1995-09-01), Gillig
patent: 5566204 (1996-10-01), Kardontchik et al.
patent: 5752169 (1998-05-01), Hareyama et al.
patent: 5890051 (1999-03-01), Schlang et al.
patent: 6421530 (2002-07-01), Adachi et al.

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