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High-drive CMOS current amplifier

IEEE Journal of Solid-State Circuits, ISSN: 0018-9200, Vol: 33, Issue: 2, Page: 228-236
1998
  • 39
    Citations
  • 0
    Usage
  • 26
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    39
    • Citation Indexes
      39
  • Captures
    26

Article Description

A high-performance current amplifier is proposed which is based on a folded-cascode transresistance amplifier and a low-distortion class AB current output stage. The loop gain of the transresistance amplifier exhibits a gain bandwidth product of 10 MHz and a dc gain as high as 100 dB which allows accurate closed-loop operations to be achieved. Despite the intrinsic low-linearity performance of current amplifiers with respect to their voltage amplifier counterpart, the proposed circuit provides an output current of 7 mA with a total harmonic distortion (THD) better than -55 dB while requiring only 200 μA of quiescent current for the output transistors. The circuit was fabricated in a 1.2-μm CMOS process, uses a 5-V power supply, and dissipates 4 mW.

Bibliographic Details

Gaetano Palumbo; Giuseppe Palmisano; Salvatore Pennisi

Institute of Electrical and Electronics Engineers (IEEE)

Engineering

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