Title :
A 90nm-CMOS 1.8mW 87dB-SNR 3rd order analog filter for GSM receivers
Author :
De Matteis, M. ; Amico, S.D. ; Delizia, P. ; Baschirotto, A. ; Azeredo-Leme, C. ; Tavares, A.
Author_Institution :
Dep. of Innovation Eng., Univ. of Salento, Lecce
fDate :
June 22 2008-April 25 2008
Abstract :
A 3rd order continuous time low pass filter for a GSM Receiver is presented. The filter uses the cascade of two active RC cells. The cut-off frequency deviation due to the technological spread, aging and temperature variation is adjusted by an on-chip tuning circuit. Fine definition (based on filter quality factor sensitivity functions) of the opamp frequency response and thermal/flicker noise optimization provides accurate filter transfer function. No miller cap tuning is needed, saving area and linearity. The device in 90 nm CMOS technology consumes 1.8 mW, features 87dB-SNR and 48 muVrms in-band integrated noise. The supply voltage is 1.2 V. The filter has been designed using an automatic Matlab design procedure which is validated by the agreement between the simulation results and the expected performance.
Keywords :
CMOS analogue integrated circuits; RC circuits; low-pass filters; receivers; CMOS; GSM receivers; RC cells; analog filter; automatic Matlab design; cut-off frequency; filter transfer function; low pass filter; opamp frequency; power 1.8 mW; size 90 nm; voltage 1.2 V; 1f noise; Aging; CMOS technology; Circuit optimization; Cutoff frequency; Frequency response; GSM; Low pass filters; Q factor; Temperature sensors; Analog filter; Cut-off frequency Tuning; GSM;
Conference_Titel :
Research in Microelectronics and Electronics, 2008. PRIME 2008. Ph.D.
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-1983-8
Electronic_ISBN :
978-1-4244-1984-5
DOI :
10.1109/RME.2008.4595753
