Clipping circuit and radio transmitter using the same

Details Clipping circuit and radio transmitter using the same Clipping circuit and radio transmitter using the same

2008-07-01

2008-07-01

Nguyen, Lee (Department: 2618)

Telecommunications

Transmitter

Carrier amplitude control

C455S114300, C330S150000

Reexamination Certificate

active

07395034

ABSTRACT:
A clipping circuit to limit amplitude of an orthogonal baseband signal includes a 16-gonal clipping circuit almost equivalent to a circular clipping circuit. The 16-gonal clipping circuit includes plural stages of series-connected units each including a rectangular clipping circuit and a phase rotating module. To compensate for variation in the signal amplitude due to the rectangular clipping circuits and the phase rotating modules, an amplitude adjuster conducts amplitude scaling for the signal.

REFERENCES:
patent: 3686489 (1972-08-01), Hobrough
patent: 6947710 (2005-09-01), Samuels et al.
patent: 2003/0104792 (2003-06-01), Doi
patent: 1286542 (2001-03-01), None
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patent: 1 318 600 (2003-06-01), None
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patent: 2001-69184 (2001-03-01), None
patent: 2003-168931 (2003-06-01), None
International Search Report mailed Feb. 1, 2005.

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