A temperature insensitive low noise RC relaxation oscillator
Zhao, Peihua
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https://hdl.handle.net/2142/108159
Description
Title
A temperature insensitive low noise RC relaxation oscillator
Author(s)
Zhao, Peihua
Issue Date
2020-05-11
Director of Research (if dissertation) or Advisor (if thesis)
Hanumolu, Pavan Kumar
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
RC Oscillator
Temperature Insensitive
Abstract
A 50 kHz temperature insensitive RC relaxation oscillator is presented. A novel RC branch, which has a zero temperature coefficient (ZTC) point in its charging curve, is used so that the period of the oscillator is insensitive to temperature variation. With the absence of current source in the RC branch, good noise performance is also achieved. Combined with the comparator offset canceling switch matrix, good temperature stability and noise performance is achieved. Fabricated in the 65 nm CMOS technology, the prototypes achieve an average inaccuracy of 7.5 ppm/° C (-40° C to 80° C), and ±.254%/0.1 V. Noise measurement shows 3.5 ppm Allan deviation with a 1 second measurement period.
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