Title :
An integrated coil driver with discrete control and power efficient ASK modulation for transcutaneous power transmission
Author :
Lee, Edward K. F.
Author_Institution :
Alfred Mann Found., Santa Clarita, CA, USA
Abstract :
An Integrated feedback controlled coil driver for transcutaneous power transmission was implemented in a high voltage 0.18μm CMOS process. The coil driver was compensated using a discrete switched-capacitor controller for reducing the compensation capacitor area. Different methods to reduce the on-resistance of the coil driver switch had also been investigated. When compared to the previous design, the figure of merit for measuring the effectiveness of generating coil current was improved over 2.5 times. ASK modulation on the coil current was achieved by switching on or off an off-chip capacitor. Power increase during ASK modulation was reduced by 49.4% when compared to the previous design.
Keywords :
CMOS integrated circuits; amplitude shift keying; coils; compensation; discrete systems; driver circuits; feedback; power transmission control; switched capacitor networks; switches; CMOS process; coil current; coil driver switch; compensation capacitor area reduction; discrete switched capacitor controller; figure of merit; integrated feedback controlled coil driver; off-chip capacitor; on-chip capacitor; on-resistance reduction; power efficient ASK modulation; size 0.18 mum; transcutaneous power transmission; Amplitude shift keying; Coils; Implants; Power dissipation; Power transmission; Switches;
Conference_Titel :
Circuits and Systems (ISCAS), 2014 IEEE International Symposium on
Conference_Location :
Melbourne VIC
Print_ISBN :
978-1-4799-3431-7
DOI :
10.1109/ISCAS.2014.6865329
