A 228µW injection locked ring oscillator based BPSK demodulator in 65nm CMOS

Author

Zhu, Qiang ; Xu, Yang

Author_Institution

Dept. of Electr. & Comput. Eng., Illinois Inst. of Technol., Chicago, IL, USA

fYear

2010

fDate

23-25 May 2010

Firstpage

497

Lastpage

500

Abstract

This paper presents an ultra-low power BPSK demodulator based on injection locked oscillators (ILOs). Two second harmonic ILOs are employed to convert BPSK signals to ASK signals which are demodulated by an envelope detector to baseband signals. For sub-GHz applications, the ILOs are implemented using ring oscillators to allow compact chip area and ultra-low power dissipation. The prototype demodulator is fabricated in a 65nm CMOS technology that consumes 228μW of power and occupies 0.014mm² of die area. Measurement results reveal the demodulation of BPSK signal at 750-900MHz carrier with the minimum sensitivity of -33dBm.

Keywords

demodulators; injection locked oscillators; phase shift keying; ASK signal; BPSK demodulator; BPSK signal; CMOS; baseband signal; compact chip area; envelope detector; frequency 750 MHz to 900 MHz; injection locked ring oscillator; power 228 muW; size 65 nm; Amplitude shift keying; Baseband; Binary phase shift keying; CMOS technology; Demodulation; Envelope detectors; Injection-locked oscillators; Power dissipation; Ring oscillators; Signal detection; CMOS analog integrated circuits; demodulators; injection locked oscillators; phase shift keying; telemetry;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Frequency Integrated Circuits Symposium (RFIC), 2010 IEEE

Conference_Location

Anaheim, CA

ISSN

1529-2517

Print_ISBN

978-1-4244-6240-7

Type

conf

DOI

10.1109/RFIC.2010.5477316

Filename

5477316