Cmos schmitt trigger

Details Cmos schmitt trigger Cmos schmitt trigger

H - Electricity

03

K

328/194

H03K 17/687 (2006.01) H03K 3/3565 (2006.01) H03K 19/017 (2006.01) H03K 19/0185 (2006.01) H03K 19/0948 (2006.01)

Patent

CA 1214226

ABSTRACT OF THE DISCLOSURE A Schmitt trigger using only six FETs comprises a first p-channel MOSFET whose drain is connected to a ground rail and a first n-channel MOSFET whose drain is connected to a voltage supply rail positive with respect to the ground rail, whose gates are connected to a common input, and whose sources are connected together. A second p-channel MOSFET has its source connected to the voltage supply rail, and its gate connected to the source of the first p-channel MOSFET, and a second n-channel MOSFET has its source connected to the ground rail, whose gate is connected to the gate of the second p-channel MOSFET and its drain connected to the drain of the second p-channel MOSFET to form a common output. A third p-channel MOSFET has its source connected to the voltage supply rail, whose drain is connected to the gate of the second p-channel MOSFET and its gate connected to the drain of the second p-channel MOSFET. A third n-channel MOSFET has its source connected to the ground rail, its drain connected to the gate of the second n-channel MOSFET and its gate connected to the drain of the second n-channel MOSFET.

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