Patent ID: 8009785

Claim:
An integrated circuit radio transceiver, comprising: baseband processor for processing ingoing and outgoing digital communication signals; transmitter front end for processing and transmitting outgoing RF signals based upon the outgoing digital communication signals; receiver front end for receiving ingoing RF signals and for processing the ingoing RF signals to produce the ingoing digital communication signals; and phase locked loop circuitry operable to provide a local oscillation to at least one of the transmitter and receiver front ends to support up-conversion to RF and down-conversion from RF, respectively, the phase locked loop circuitry further including: a voltage controlled oscillator operable to produce an oscillation characterized by a specified frequency signal; a phase-frequency detector operable to compare a feedback signal based upon the oscillation to a reference signal to produce an adjustment signal; a charge pump operable to produce a charging current based upon the adjustment signal; a loop filter operable to produce an oscillator control voltage to the voltage controlled oscillator based upon the charging current; wherein at least one of the charge pump and the loop filter comprise a first MOSFET switch having a first gate oxide thickness that requires a first threshold voltage to bias the first MOSFET on; wherein the integrated circuit radio transceiver comprises a library of second MOSFET devices having a second gate oxide thickness and require a second threshold voltage to bias the second MOSFETs on, wherein a quantity of the second MOSFET devices of the library that are used within the integrated circuit radio transceiver is much greater than a quantity of the first MOSFET devices; and wherein the first gate oxide thickness is greater than the second gate oxide thickness and wherein the first threshold voltage is greater than the second threshold voltage.