Methods and apparatuses for slew rate enhancement of amplifiers

A circuit to enhance slew rate, comprising:

• an amplifier comprising a first input and a second input in a differential pair configuration and an output, the differential pair configuration having a first side and a second side;
• a slew rate enhancer comprising:
• a first slew direction enhancer 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 the first side of the differential pair configuration of the amplifier during the first slew rate condition using a first pull-up transistor, the first pull-up transistor configured to supply an adjustment signal in response to a low voltage;
• a second slew direction enhancer 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 configuration of the amplifier during the second slew rate condition.

A method of enhancing slew rate, comprising:

• detecting a first slew rate condition responsive to a first offset in a first direction between a first input and a second input using a first differential pair;
• providing additional current for a first side of a differential pair of an amplifier coupled to the first input and the second input during the first slew rate condition using a first pull-up transistor, the first pull-up transistor configured to supply an adjustment signal in response to a low voltage;
• detecting a second slew rate condition responsive to a second offset in a second direction between the first input and the second input using a second differential pair;
• and
• providing additional current for a second side of the differential pair of the amplifier during the second slew rate condition.