Temperature sensor insensitive to device offsets with...

Details Temperature sensor insensitive to device offsets with... Temperature sensor insensitive to device offsets with...

2008-03-11

2008-03-11

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including temperature compensation means

C455S073000

Reexamination Certificate

active

07342455

ABSTRACT:
A radio transceiver includes circuitry that enables received RF signals to be down-converted to baseband frequencies and baseband signals to be up-converted to RF signals prior to transmission without requiring conversion to an intermediate frequency. The circuitry includes a temperature sensing module that produce accurate voltage level readings may be mapped into corresponding temperature values. A processor, among other actions, adjusts gain level settings based upon detected temperature values. One aspect of the present invention further includes repetitively inverting voltage signals across a pair of semiconductor devices beings used as temperature sensors to remove a common mode signal to produce an actual temperature-voltage curve. In one embodiment of the invention, the circuitry further includes a pair of amplifiers to facilitate setting a slope of the voltage-temperature curve.

REFERENCES:
patent: 6366622 (2002-04-01), Brown et al.
patent: 7046959 (2006-05-01), Ammar et al.

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