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A relaxation oscillator with multi-phase triangular waveform generation

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5 Author(s)
Hang Lv ; Inst. of Microelectron., Tsinghua Univ., Beijing, China ; Bo Zhou ; Woogeun Rhee ; Yongming Li
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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.

Published in:

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

Date of Conference:

15-18 May 2011