Texas Instruments Incorporated
Multi-stage amplifier including a pre-driver stage

Abstract:

A multi-stage amplifier including a pre-driver stage, and method of operating the same. In one example, the amplifier includes an output stage with a first output transistor coupled to an oppositely doped second output transistor and to an output terminal. The pre-driver stage includes with a first driver transistor coupled to the first output transistor, and a second driver transistor coupled to the second output transistor. The pre-driver stage also includes a first current mirror and a second current mirror coupled to the first driver transistor and the second driver transistor. The pre-driver stage also includes a first translinear loop having a first translinear loop transistor and a second translinear loop having a second translinear loop transistor coupled to the first output transistor and the second output transistor.