Patent ID: 7369816
Filing Date: 2008-05-06
Classification: H03G

Abstract:
1. A direct conversion Radio Frequency (RF) transceiver integrated circuit comprising: a local oscillator that generates an RF local oscillation signal corresponding to an RF channel; a receiver section operably coupled to the local oscillator that receives an incoming RF signal and down converts the incoming RF signal based upon the RF local oscillation signal to produce a baseband signal; a transmitter section of the integrated circuit operably coupled to the local oscillator that receives an outgoing baseband signal and up converts the outgoing baseband signal to produce an outgoing RF signal; and wherein the transmitter section further comprises: a heat generating circuit; a temperature sensing module operable to produce an indication of an operating temperature of the heat generating circuit wherein the temperature sensing module is operable to apply a first current continuously through a semiconductor device and to periodically apply a supplemental current through the semiconductor device to generate proportional-to-absolute temperature responses and to produce the proportional-to-absolute temperature responses to at least a 16 bit high resolution analog-to-digital converter to allow a digital processor to make gain setting determinations based on minor changes in temperature; and logic to adjust a gain setting for each of a plurality of adjustable gain elements each operably having a gain setting that is based upon the indication of the operating temperature provided by the temperature sensing module wherein each gain setting is adjusted so that a total gain level remains constant.