Title :
A low-power FSK modulator/demodulator for an MICS band transceiver
Author :
Tekin, Ahmet ; Yuce, Mehmet R. ; Shabani, Javad ; Liu, Wentai
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Cruz, CA, USA
Abstract :
This paper presents a low-power FSK (frequency shift keying) modulator/demodulator. It supports a data rate of 20 kb/s and uses a phase interpolating clock recovery circuit that forces the rising edge of the clock track the demodulated data precisely. In the transmitter side, the base-band data directly modulate a four stage differential ring VCO (voltage controlled oscillator) with an FSK tone frequency of 80 kHz fitting into one of ten 300-kHz channels allocated at the new 402-405 MHz MICS (medical implant communication services) band. The designs are implemented in a 0.18-μm CMOS process. The all digital demodulator circuits consume only 33.41 μA current from a 1.5-V supply.
Keywords :
CMOS integrated circuits; UHF integrated circuits; frequency shift keying; modulators; transceivers; 0.18 mum; 1.5 V; 20 Kbit/s; 33.41 muA; 402 to 405 MHz; CMOS process; MICS band transceiver; VCO; demodulator; frequency shift keying; low-power FSK modulator; medical implant communication services; phase interpolating clock recovery circuit; transmitter; voltage controlled oscillator; Clocks; Demodulation; Frequency modulation; Frequency shift keying; Implants; Microwave integrated circuits; Radio spectrum management; Transceivers; Transmitters; Voltage-controlled oscillators;
Conference_Titel :
Radio and Wireless Symposium, 2006 IEEE
Print_ISBN :
0-7803-9412-7
DOI :
10.1109/RWS.2006.1615119
