Study of chopper stabilization in single ended amplifiers
Malhotra, Chetna
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https://hdl.handle.net/2142/106188
Description
Title
Study of chopper stabilization in single ended amplifiers
Author(s)
Malhotra, Chetna
Issue Date
2019-11-15
Director of Research (if dissertation) or Advisor (if thesis)
Hanumolu, Pavan K.
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)
Chopper Stabilization
Operational Amplifier
Abstract
Chopper stabilization is one of the prominent techniques used to overcome low-frequency noise and DC offset errors in CMOS amplifiers. This thesis presents a detailed analysis of this approach. The fundamentals of chopping, followed by the design and underlying tradeoffs of a chopper stabilized amplifier, are included. A chopper stabilized, single ended amplifier in closed loop unity gain configuration is designed using the folded cascode topology in 180 nm CMOS process. This design is verified for functionality by a thorough comparison with its non-stabilized counterpart. Simulation results, including the benefits obtained in terms of reduced flicker noise and an amplified output voltage independent of input DC offsets, are discussed.
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