METHODS AND APPARATUSES FOR SLEW RATE ENHANCEMENT OF AMPLIFIERS

摘要

A circuit is disclosed to enhance slew rate of an amplifier. An amplifier includes an output, a first input, and a second input in a differential pair configuration. A slew rate enhancer includes a first slew rate enhancer and a second slew rate enhancer. The first slew direction enhancer is configured to detect a first slew rate condition in a first direction responsive to the first input and the second input and provide additional current for a first side of the differential pair of the amplifier during the first slew rate condition. The second slew direction enhancer is configured to detect a second slew rate condition in a second direction responsive to the first input and the second input and provide additional current for a second side of the differential pair of the amplifier during the second slew rate condition.

主权项

1. A circuit to enhance slew rate, comprising:
an amplifier comprising a positive input operably coupled to a first side of an amplifier differential pair, a negative input operably coupled to a second side of the amplifier differential pair, and an output; a first slew direction enhancer comprising a first differential pair operably coupled to the positive input and the negative input, wherein the first differential pair is configured to cause the first slew direction enhancer to provide additional current for the first side of the amplifier differential pair during an offset in a first direction between the positive input and the negative input; and a second slew direction enhancer comprising a second differential pair operably coupled to the positive input and the negative input, wherein the second differential pair is configured to cause the second slew direction enhancer to provide additional current for the second side of the amplifier differential pair during an offset in a second direction between the positive input and the negative input.