Voltage slope control method and apparatus for power driver circuit application

摘要

A drive circuit includes a first transistor coupled in series with a second transistor at a first intermediate node coupled to a load. An amplifier has an output driving a control terminal of the second transistor. The amplifier includes a first input coupled to a second intermediate node and a second input coupled to a reference voltage. A feedback circuit is coupled between the first intermediate node and the second intermediate node. A slope control circuit is coupled the second intermediate node. The slope control circuit injects a selected value of current into the second intermediate node, that current operating to control the output of the amplifier in setting a slope for change in voltage at the first intermediate node.

主权项

1. A circuit, comprising:
a drive circuit including a first transistor coupled in series with a second transistor at a first intermediate node configured to be coupled to a load; a capacitor coupled between the first intermediate node and a second intermediate node; an amplifier having a first input coupled to the second intermediate node, a second input coupled to a reference voltage and an output coupled to a control terminal of the second transistor; and a current source configured to source a current to said second intermediate node having a value responsive to a control signal that is independent of an output signal at the first intermediate node.