Patent ID: 7787527

Claim:
An integrated circuit radio transceiver, comprising: a baseband processor operable to process ingoing digital communication signals and to produce outgoing digital communication signals; a transmitter front end operable to process and transmit outgoing RF signals based upon the outgoing digital communication signals; a receiver front end operable to receive ingoing RF signals and to process the ingoing RF signals to produce the ingoing digital communication signals to the baseband processor; and an analog comparator circuit with associated hysteresis logic operably disposed to provide a logic switching mechanism based upon an input voltage level to at least one of the transmitter front end, the receiver front end and the baseband processor, the analog comparator circuit with associated hysteresis logic further including: a voltage comparator block operably disposed to receive a voltage input signal at a positive terminal of the voltage comparator block and a selected reference voltage at a negative terminal of the voltage comparator block and operable to produce a logic output based upon a favorable comparison; a hysteresis logic block operable to produce one of a plurality of reference voltage levels to the negative terminal of the voltage comparator block as the selected reference voltage based upon a two-level reference signal input and further based upon a detected transition in logic of an output produced by the voltage comparator block wherein the output is received by the hysteresis logic block in a feedback signal; and wherein the analog comparator circuit with associated hysteresis logic is operable to produce a first logic output based upon a favorable comparison between the voltage input signal and a lower level of the two-level reference signal input and a second logic output based upon an unfavorable comparison between the voltage input signal and the lower level of the two-level reference signal.