Method and apparatus for reducing crowbar current
AssigneeQUALCOMM Incorporated
InventorYu Huang
Life of this patent
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Abstract
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.
Claims30
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;
- and
- 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.
A method for reducing crowbar current in a circuit including 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 method comprising:
- turning off the first switch when the output of the inverter is in a low output state;
- and
- turning off the second switch when the output of the inverter is in a high output state.
An apparatus for reducing crowbar current, comprising:
- means for inverting a signal;
- first means for switching coupled between the means for inverting and a first power supply rail;
- second means for switching coupled between the means for inverting and a second power supply rail;
- means for turning off the first means for switching when an output of the means for inverting is in a low output state;
- and
- means for turning off the second means for switching when the output of the means for inverting is in a high output state.
Dependencies are inferred from the claim text.