Title :
A 5th-order continuous-time harmonic-rejection GmC filter with in-situ calibration for use in transmitter applications
Author :
Rudell, Jacques C. ; Erdogan, Ozan E. ; Yee, Dennis G. ; Brockenbrough, Roger ; Conroy, Cormac S G ; Kim, Beomsup
Author_Institution :
Berkana Wireless, Campbell, CA, USA
Abstract :
A 0.18 μm CMOS fifth-order harmonic-rejection GmC filter is presented for use in offset PLL transmitter applications. Using an in-situ calibration scheme with a tuning accuracy of 2% and a maximum calibration time of 90 μs, this filter tunes from 52 to 151MHz and draws 7mA from a 1.8V supply while achieving an IIP3 of 7dBV with an output noise floor of 9.3 μV in a 30kHz BW.
Keywords :
CMOS integrated circuits; band-stop filters; calibration; cellular radio; circuit tuning; continuous time filters; harmonics suppression; phase locked loops; radio transmitters; 0.18 micron; 1.8 V; 30 kHz; 52 to 151 MHz; 5th-order filter; 7 mA; CMOS filter; fifth-order harmonic-rejection GmC filter; in-situ calibration; offset PLL transmitter; tuning; Calibration; Capacitors; Feedback; Frequency estimation; GSM; Oscillators; Power harmonic filters; Switches; Transmitters; Tuning;
Conference_Titel :
Solid-State Circuits Conference, 2005. Digest of Technical Papers. ISSCC. 2005 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-8904-2
DOI :
10.1109/ISSCC.2005.1493999
