Title :
An implantable digital telemetry integrated circuit using an automatic resonant-frequency search technique
Author :
Fernald, K.W. ; Paulos, J.J. ; Stackhouse, B.A. ; Heaton, R.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
Abstract :
An integrated circuit is presented which uses a voltage-controlled oscillator (VCO) and amplitude detector to search for the resonant frequency prior to each transmission, thus guaranteeing resonant operation despite variations in either antenna or integrated circuit characteristics. A block diagram of the transmitter is shown. The transmitter design is combined with a simpler on-off keying receiver and the necessary digital logic to support bidirectional digital telemetry.<>
Keywords :
CMOS integrated circuits; biological techniques and instruments; biomedical electronics; digital communication systems; mixed analogue-digital integrated circuits; phase shift keying; receivers; telemetering equipment; transmitters; variable-frequency oscillators; LV CMOS process; PSK; VCO; amplitude detector; automatic resonant-frequency search; bidirectional telemetry; digital telemetry integrated circuit; implantable IC; on-off keying receiver; transmitter; voltage-controlled oscillator; Detectors; Digital integrated circuits; Driver circuits; Phase modulation; Phase shift keying; Resonance; Resonant frequency; Telemetry; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 1992. Digest of Technical Papers. 39th ISSCC, 1992 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0573-6
DOI :
10.1109/ISSCC.1992.200414
