Title :
A loop-bandwidth calibration system for fractional-N synthesizer and ΔΣ-PLL transmitter
Author :
Akamine, Yukinori ; Kawabe, Manabu ; Hori, Kazuyuki ; Okazaki, Takao ; Tolson, Nigel ; Kasahara, Masumi ; Tanaka, Satoshi
Author_Institution :
Hitachi Ltd., Kokubunji, Japan
Abstract :
A 0.25 μm BiCMOS fractional-N PLL with loop-bandwidth calibration is implemented in 3.3×3.3mm2. Using double-integration that integrates VCO output signal over the transient step response, the calibrated PLL achieves tuning accuracy of 2% with less than 2° rms phase error when used as a ΔΣ-PLL transmitter for GSM.
Keywords :
BiCMOS integrated circuits; UHF integrated circuits; calibration; cellular radio; phase locked loops; radio transmitters; voltage-controlled oscillators; ΔΣ-PLL transmitter; 0.25 micron; BiCMOS fractional-N PLL; GSM; VCO output signal; double integration; fractional-N synthesizer; loop-bandwidth calibration system; transient step response; Calibration; Charge pumps; Counting circuits; Field programmable gate arrays; Filters; GSM; Phase locked loops; Synthesizers; Transmitters; Voltage-controlled oscillators;
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.2005.1493995
