[IEEE IEEE 2nd Dallas CAS Workshop on Low Power/Low Voltage Mixed-Signal Circuits & Systems (DCAS-01) - Plano, TX, USA (26 March 2001)] Proceedings of the IEEE 2nd Dallas CAS Workshop on Low Power/Low Voltage Mixed-Signal Circuits & Systems (DCAS-01) (Cat. No.01EX454) - An implantable low power mixed signal telemetry chip for measurements of the frequency dependent impedance of transplanted kidneys for rejection control