A CMOS Integrated Power Detector for UWB

An integrated CMOS RF power detector for wideband systems that does not require additional processing steps is presented. The received signal modulates the resistance of a MOSFET biased in triode to produce a DC current at the input of a transimpedance amplifier proportional to the received power. The resulting voltage is applied to an auto-zeroed logarithmic amplifier that provides offset cancellation without lowpass filtering. Simulation shows that the detector is capable of resolving a 40dB input dynamic range across the 3-10GHz UWB spectrum while dissipating less than 8mW.