Apparatus and method for enabled switch detection

Details Apparatus and method for enabled switch detection Apparatus and method for enabled switch detection

2011-08-30

2011-08-30

Nguyen, Patricia (Department: 2817)

Amplifiers

Combined with automatic amplifier disabling switch means

C330S296000, C330S297000

Reexamination Certificate

active

08008970

ABSTRACT:
Apparatuses and methods for enabled switch detection are disclosed. In one embodiment, an apparatus includes a complimentary metal oxide semiconductor (CMOS) switch having a gate, a drain, a source, and a well. The source and drain are formed in the well, and the gate is formed adjacent the well between the source and drain. The source is configured to receive a radio frequency signal from a first power amplifier. The apparatus further includes a switch enable detect block configured to compare a signal indicative of the gate voltage of the first switch to a first reference signal and to generate an output comparison signal based at least partly on the comparison. The apparatus further includes a power amplifier bias control block configured to enable the first power amplifier based at least partly on the output comparison signal from the switch sense block.

REFERENCES:
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patent: 6384684 (2002-05-01), Redman-White
patent: 7301402 (2007-11-01), Norris et al.
patent: 7508266 (2009-03-01), Hissen et al.
patent: 7839218 (2010-11-01), Shimamoto et al.
patent: 2008/0272755 (2008-11-01), Melanson

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