Title :
A 1 volt CMOS 2/4 level FSK digital demodulator for pager applications
Author :
Shakeri, Kaveh ; Hashemi, Hossein ; Parsa, Ali ; Fotowat, Ali ; Rofougaran, Reza
Author_Institution :
Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran
Abstract :
A 2/4-level FSK digital demodulator for integration in a single multi-standard pager chip is presented. The demodulator function is based on counting the zero crossings of the FSK signal. Frequency offset due to crystal imperfections, etc. is corrected. The output BER is 0.7% and 5% for input CNR of 4 dB for 2-level and 4-level FSK respectively with frequency offset of 2 kHz. This design uses 0.8-μm CMOS technology and operates with a power supply as low as 1 V
Keywords :
CMOS integrated circuits; demodulators; digital radio; frequency shift keying; low-power electronics; mixed analogue-digital integrated circuits; paging communication; 0.8 mum; 1 V; 2-level FSK; 2/4 level FSK demodulator; 4-level FSK; CMOS technology; FSK digital demodulator; frequency offset correction; multi-standard pager chip; pager applications; zero crossings counting; Bit error rate; CMOS technology; Clocks; Costs; Counting circuits; Demodulation; Frequency shift keying; Frequency synchronization; Power supplies; Pulse circuits;
Conference_Titel :
Circuits and Systems, 1999. 42nd Midwest Symposium on
Conference_Location :
Las Cruces, NM
Print_ISBN :
0-7803-5491-5
DOI :
10.1109/MWSCAS.1999.867247
