Title :
A fully integrated 1.175-to-2GHz frequency synthesizer with constant bandwidth for DVB-T applications
Author :
Lu, Lei ; Yuan, Lu ; Min, Hao ; Tang, Zhangwen
Author_Institution :
ASIC & Syst. State Key Lab., Fudan Univ., Shanghai
fDate :
June 17 2008-April 17 2008
Abstract :
A fully integrated 1.175 to 2 GHz differentially tuned frequency synthesizer aimed for DVB-T tuners is implemented in 0.18-mum CMOS. Techniques are proposed to make the loop bandwidth constant across the whole output frequency range to maintain phase noise optimization and loop stability. It exhibits in-band phase noise of -97.6 dBc/Hz at 10 kHz offset and integrated phase error of 0.63deg from 100 Hz to 10 MHz. The chip draws 10 mA from a 1.8 V supply while occupying 2.6 mm2 die area.
Keywords :
CMOS integrated circuits; UHF integrated circuits; circuit tuning; digital video broadcasting; frequency synthesizers; phase noise; CMOS technique; DVB-T application; constant loop bandwidth; current 10 mA; differentially tuned frequency synthesizer; digital video broadcasting-terrestrial tuners; frequency 1.175 GHz to 2 GHz; frequency 100 Hz to 10 MHz; in-band phase noise; integrated phase error; local oscillator; loop stability; phase noise optimization; size 0.18 mum; voltage 1.8 V; Automatic frequency control; Bandwidth; Charge pumps; Digital video broadcasting; Frequency synthesizers; Phase frequency detector; Phase noise; Tuning; Voltage-controlled oscillators; Wideband; Frequency synthesizer; constant bandwidth; phase noise; tuning gain (KVCO); wideband;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium, 2008. RFIC 2008. IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-1808-4
Electronic_ISBN :
1529-2517
DOI :
10.1109/RFIC.2008.4561441
