Title :
A fully integrated GMSK modulator using BiCMOS Σ-Δ frequency synthesizer with automatic loop gain calibration
Author :
Lee, Chang-Hyeon ; Lee, Hoon ; Good, Pete
Author_Institution :
Skyworks Solutions Inc., Irvine, CA, USA
Abstract :
A 2.7 V 16 mA GMSK modulator using a Σ-Δ frequency synthesizer with automatic loop gain calibration is implemented on a 3.2 mm2 die area using a 0.35 μm BiCMOS process. It meets the GSM transmit spectral mask specification and achieves a close-in phase noise of -90 dBc/Hz and spurious noise level of -75 dBc/Hz without modulation.
Keywords :
BiCMOS integrated circuits; calibration; cellular radio; frequency synthesizers; integrated circuit design; minimum shift keying; modulators; phase noise; random noise; sigma-delta modulation; voltage-controlled oscillators; Σ-Δ frequency synthesizer; 0.35 micron; 16 mA; 2.7 V; BiCMOS process; GSM transmit spectral mask specification; automatic loop gain calibration; close-in phase noise; integrated GMSK modulator; sigma-delta frequency synthesizer; spurious noise level; Bandwidth; BiCMOS integrated circuits; Calibration; Delta modulation; Filters; Frequency synthesizers; Phase locked loops; Phase noise; Quantization; Voltage-controlled oscillators;
Conference_Titel :
Radio Frequency integrated Circuits (RFIC) Symposium, 2005. Digest of Papers. 2005 IEEE
Print_ISBN :
0-7803-8983-2
DOI :
10.1109/RFIC.2005.1489636
