A relaxation oscillator with multi-phase triangular waveform generation

Author

Lv, Hang ; Zhou, Bo ; Rhee, Woogeun ; Li, Yongming ; Wang, ZhiHua

Author_Institution

Inst. of Microelectron., Tsinghua Univ., Beijing, China

fYear

2011

fDate

15-18 May 2011

Firstpage

2837

Lastpage

2840

Abstract

This paper firstly presents a CMOS voltage-controlled oscillator (VCO) which enables octa-phase triangular waveform generation. By utilizing a cascaded relaxation oscillator core followed by a pseudo injection-locked oscillator circuit, an octa-phase differential VCO with triangular waveform outputs is realized. Simulation results show that the proposed fully differential multi-phase VCO can achieve broad tuning range with programmable timing capacitors, offering <;1% phase mismatch.

Keywords

CMOS integrated circuits; capacitors; injection locked oscillators; voltage-controlled oscillators; waveform generators; CMOS voltage-controlled oscillator; multiphase triangular waveform generation; octa-phase differential VCO; octa-phase triangular waveform generation; programmable timing capacitors; pseudo injection-locked oscillator circuit; relaxation oscillator; triangular waveform output; CMOS integrated circuits; Capacitors; Frequency shift keying; Propagation delay; Timing; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2011 IEEE International Symposium on

Conference_Location

Rio de Janeiro

ISSN

0271-4302

Print_ISBN

978-1-4244-9473-6

Electronic_ISBN

0271-4302

Type

conf

DOI

10.1109/ISCAS.2011.5938196

Filename

5938196