Patent ID: 6753708
Filing Date: 2004-06-22
Classification: H03K

Abstract:
A circuit comprising a first terminal for connection to a voltage source having first and second levels and a transition between the levels, a driver including first and second opposite conductivity type transistors, said first and second transistors being respectively a PFET and an NFET, each of said transistors including a gate electrode and a source drain path switched on and off in response to a voltage applied to the gate electrode being on opposite sides of a threshold, the first and second transistor paths being connected in series across opposite power supply terminals, and pulse shaping circuitry for (a) causing the first and second source drain paths to be respectively (i) on and off while the voltage source has the first level and (ii) off and on while the voltage source has the second level, and (b) preventing both source drain paths from being on simultaneously, the circuitry including a first resistive element and a first capacitor, the first resistive element being connected for supplying current to the first capacitor and the gate electrode of the first transistor, the first capacitor being connected across the gate electrode of the first transistor and a first of the power supply terminals, the first capacitor comprising a field effect device having a conductivity type opposite to the conductivity type of the first transistor, the circuitry further including a second resistive element and a second capacitor, the second resistive element being connected for supplying current to the second capacitor and the gate electrode of the second transistor, the second capacitor being connected across the gate electrode of the second transistor and a second of the power supply terminals.