Area-Efficient Switched Capacitor Non-Filtering Circuits: Sum-Gain Amplifiers

Abstract

Switched capacitor sum-gain amplifiers (SGAs) are widely used in parallel fIlter systems. The capacitance spread of such circuits is proportional to the coefficient spread, thus making conventional SGAs un-suitable for high gain applications. SGANs with different input phases and a SGA with the same input phase are discussed, and a new area-efficient SGA, which can reduce the capacitance spread to the square root of coefficient spread ratio, is proposed. Furthermore, the non-ideal effects of op-amp like fInite DC gain and offset voltage are compensated by using the offset storing capacitor. All the circuits designed here only use the bi-phase clocking scheme.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1992
Accession Number
ADA454955

Entities

People

  • Jyhfong Lin
  • Shihab A Shamma
  • Thomas H Edwards

Organizations

  • University of Maryland

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Amplifiers
  • Capacitance
  • Capacitors
  • Coefficients
  • Filtration
  • Gain
  • High Gain
  • Information Operations
  • Numbers
  • Square Roots
  • Universities

Readers

  • Integrated Circuit Design and Technology.
  • Military Engineering.
  • Radio communications and signal processing.