Power stage
First Claim
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1. An apparatus, comprising:
- an input circuit configured and arranged to provide a drive signal in response to receiving an input voltage;
a first set of isolation capacitive couplers provided with the drive signal from the input circuit;
at least one differential buffer stage, having a high side buffer stage and a low side buffer stage, configured and arranged to receive the drive signal from the first set of isolation capacitive couplers; and
an output stage, between a high voltage rail and a low voltage rail, configured and arranged to drive an isolation transformer through a second set of isolation capacitive couplers in response to the drive signal received from the at least one differential buffer stage.
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Abstract
A power stage has a differential output stage 2 driven by one or more buffer stages 4. The buffer stages 4 are implemented as high and low side buffers 12,14, each of which is itself a differential buffer implemented using transistors formed in an isolated-well technology such as triple-well CMOS.
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Citations
9 Claims
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1. An apparatus, comprising:
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an input circuit configured and arranged to provide a drive signal in response to receiving an input voltage; a first set of isolation capacitive couplers provided with the drive signal from the input circuit; at least one differential buffer stage, having a high side buffer stage and a low side buffer stage, configured and arranged to receive the drive signal from the first set of isolation capacitive couplers; and an output stage, between a high voltage rail and a low voltage rail, configured and arranged to drive an isolation transformer through a second set of isolation capacitive couplers in response to the drive signal received from the at least one differential buffer stage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification