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ABSTRACT
A CMOS implementation of a high-gain current mode operational amplifier (opamp) with a single-ended input and a differential output is described. This configuration is the current mode counterpart of the traditional voltage mode opamp. In order to exploit the inherent potential for high speed, low voltage operation normally associated with current mode analog signal processing, the opamp has been designed to operate off a supply voltage of 1.5V, and the signal path has been confined to N-channel transistors. With this design, a gain of 94dB and a gain-bandwidth product of 65MHz has been achieved at a power consumption of 30pW. |
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