Charles Persico

Learn More
The theory and practical implementation of an adaptive filter of the TX leakage in CDMA receivers are described. The filter uses a continuous-time signa-data LMS algorithm. It was designed as part of a 0.25 /spl mu/m CMOS cellular-band receiver. It achieved the maximum rejection of the TX leakage of 28-30 dB, which was limited by the reference signal(More)
This paper describes a GPS receiver circuit that operates simultaneously with WCDMA/CDMA2000 transceivers. This receiver uses a low-IF architecture to minimize the external passive components. The RF front-end circuit dynamically adjusts the linearity performance based on the instantaneous transmitting power of the integrated transmitter. The receiver(More)
This first commercially available CMOS CDMA transmitter IC is based on a zero-IF architecture and designed for US/China/Korea and Japan cellular bands. The transmitter IC integrates direct upconverter, VGA, driver amplifier, VCO, and both transmit and receive PLLs in 0.24 /spl mu/m CMOS. The chip provides more than 100 dB power control range and consumes(More)
  • 1