Title :
A 400-MHz super-regenerative receiver with digital calibration for capsule endoscope systems in 0.18-μm CMOS
Author :
Tung, Ching Jen ; Liu, Yao Hong ; Liu, Hui Hsien ; Lin, Tsung Hsien
Author_Institution :
Grad. Inst. of Electron. Eng. & Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei
Abstract :
A low-power super-regenerative receiver (SR-RX) with a digitally-controlled oscillator for the capsule endoscope system is reported in this paper. In this work, an open-loop frequency calibration loop is proposed to adjust the oscillator center frequency to the desired frequency band. The RX operates in the 402-405 MHz MICS band, and is designed to receive on-off keying modulation signal. This chip was fabricated in the TSMC 0.18-mum CMOS process. The RX start-up time is only 14.8 mus and is capable of a maximum data rate of 1 Mbps. The SR-RX consumes 5.5 mW from a 1.5-V supply voltage.
Keywords :
CMOS digital integrated circuits; UHF oscillators; amplitude shift keying; biomedical communication; biomedical electronics; digital control; endoscopes; low-power electronics; open loop systems; radio receivers; MICS band; TSMC CMOS process; capsule endoscope system; digital-control oscillator; frequency 400 MHz; low-power super-regenerative receiver; medical implantable communication system; on-off keying modulation signal reception; open-loop frequency calibration loop; size 0.18 mum; Calibration; Demodulation; Endoscopes; Frequency locked loops; Impedance matching; Microwave integrated circuits; Oscillators; Phase locked loops; Space vector pulse width modulation; Timing;
Conference_Titel :
VLSI Design, Automation and Test, 2008. VLSI-DAT 2008. IEEE International Symposium on
Conference_Location :
Hsinchu
Print_ISBN :
978-1-4244-1616-5
Electronic_ISBN :
978-1-4244-1617-2
DOI :
10.1109/VDAT.2008.4542408
