MOSFET inverter with controlled slopes and a method of making
AssigneeSilicon Video Corporation
InventorChristian Boemler
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AssigneeSilicon Video Corporation
InventorChristian Boemler
Estimating the term…
An inverter is implemented in cascode having a first and second NFET and a PFET. The first NFET is biased with a voltage that makes a nearly constant and limited drain-source voltage VDS across the second lower NFET providing a current limiting effect. When an inverter input thereof goes low the PFET will pull the output high normally and the lower NFET is turned off normally. When the inverter input goes high with a normally fast edge, the PFET turns off and the lower NFET pulls the output down. Because of the cascode configuration, the inverter of this embodiment will be current limited and source-drain current is controllable by the bias current. Therefore, a slow and controllable falling edge is produced by this simple circuit. That is, changing the bias voltage applied to the bias terminal changes the slope of the trailing or falling edge of the output waveform. A four transistor implementation and a complementary implementation are possible.
An inverter comprising:
An inverter comprising:
An inverter comprising:
Dependencies are inferred from the claim text.