Title :
A positive-peak detector with adaptive micro-current compensator for wideband VCOs
Author :
De-zhi Wang ; Ke-feng Zhang ; Gong-hai Zhou ; Xue-Cheng Zou
Author_Institution :
Dept. of Electron. Sci. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
A precise positive-peak detector with adaptive micro-current compensator is proposed to trace the tank amplitude VT of wideband VCOs. The compensator includes three micro-current Imicro branches controlled by automatic frequency calibration (AFC). A decoding circuit is connected between the AFC and the compensator. If oscillation frequency of VCO increases, by use of the decoding circuit, the branch with smaller Imicro would be adaptively chosen for precisely tracing the VT. In TSMC 0.18μm CMOS technology, when the proposed positive-peak detector is used for a VCO with output frequency from 1.52GHz to 3.2GHz, the maximum detection error is 80mV under different corners and temperature from -40°C to 80°C.
Keywords :
CMOS integrated circuits; UHF detectors; UHF integrated circuits; UHF oscillators; calibration; compensation; decoding; frequency measurement; microwave detectors; microwave integrated circuits; microwave oscillators; peak detectors; voltage-controlled oscillators; AFC; TSMC CMOS technology; adaptive microcurrent compensator; automatic frequency calibration; decoding circuit; frequency 1.52 GHz to 3.2 GHz; oscillation frequency; positive-peak detector; size 0.18 mum; tank amplitude tracing; temperature -40 degC to 80 degC; voltage 80 mV; wideband VCO; Automatic frequency control; Decoding; Detectors; Phase noise; Voltage-controlled oscillators; Wideband;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-2474-8
DOI :
10.1109/ICSICT.2012.6466693
