Method and apparatus for reducing crowbar current

摘要

Techniques for reducing crowbar current are disclosed. In one embodiment, a circuit for reducing crowbar current comprises an inverter having an input and an output, a first switch coupled between the inverter and a first power supply rail, and a second switch coupled between the inverter and a second power supply rail. The circuit also comprises a feedback circuit coupled to the output of the inverter, wherein the feedback circuit is configured to turn off the first switch when the output of the inverter is in a low output state, and to turn off the second switch when the output of the inverter is in a high output state.

主权项

1. A circuit for reducing crowbar current, comprising:
an inverter having an input and an output; a first switch coupled between the inverter and a first power supply rail; a second switch coupled between the inverter and a second power supply rail; a feedback circuit coupled to the output of the inverter, wherein the feedback circuit is configured to turn off the first switch when the output of the inverter is in a low output state, and to turn off the second switch when the output of the inverter is in a high output state; and a diode-connected PMOS transistor coupled between the first power supply rail and the inverter, wherein the diode-connected PMOS transistor is configured to provide a current path between the first power supply rail and the inverter when the input of the inverter transitions from a high input state to a low input state.