DOI: 10.1109/isscc.1979.1155978
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Abstract: ONE OF THE MOST COMMONLY USED analog circuits is the voltage follower or buffer. It is usually implemented by an operational amplifier in a non-inverting unity gain configuration. However, processing restrictions and stability requirements for 100% feedback limit the slew rate of this type of monolithic device to 60V/ps and its bandwidth to 20MHz.An alternate approach is an open-loop circuit employing source followers and emitter followers to realize the buffer function. This method is inherently faster, but …

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