Current-mode amplifiers
- 13 January 2003
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1576-1579 vol.3
- https://doi.org/10.1109/iscas.1989.100661
Abstract
Traditional voltage-feedback amplifier configurations, both discrete and integrated, have always suffered from the severe disadvantage of drastically restricted bandwidth at high gains due to the problem of constant gain-bandwidth product. The author shows how adopting a current-mode approach to a range of amplifier designs based on current conveyors enables high grain and wide bandwidth to be achieved simultaneously with the added bonus of increased slew rates. Applying current feedback around a conveyor amplifier is shown to improve performance even further, achieving a 40-dB voltage gain at a bandwidth of 3.3 MHz. A new conveyor instrumentation amplifier format is presented that enables an intrinsically high current-mode rejection ratio to be obtained without the need for any resistor matching.Keywords
This publication has 6 references indexed in Scilit:
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