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

fYear

2012

fDate

Oct. 29 2012-Nov. 1 2012

Firstpage

1

Lastpage

3

Abstract

A precise positive-peak detector with adaptive micro-current compensator is proposed to trace the tank amplitude V_T of wideband VCOs. The compensator includes three micro-current I_micro 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 I_micro would be adaptively chosen for precisely tracing the V_T. 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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICSICT.2012.6466693

Filename

6466693