Amplifier with enhanced slew rate

An amplifier with enhanced slew rate, comprising:

• an input stage including a first channel coupled to receive differential inputs and a second channel coupled to receive the differential inputs;
• a middle stage including a first current source coupled to receive outputs of the second channel and electrically connected to power, a second current source coupled to receive outputs of the first channel and electrically connected to ground, and a floating current source electrically connected between the first current source and the second current source;
• and
• an output stage coupled to the middle stage to generate an output voltage;
• wherein a transit circuit is disposed in the input stage or the middle stage, controlled by voltages at output nodes of the middle stage, and configured to supply extra current during signal transition of the differential inputs, thereby enhancing the slew rate;
• wherein the first channel comprises a first bias branch electrically connected to the power, the first bias branch including transistors connected in series.