Circuitry to provide a low power input buffer

USRE41982E1 · kind E1 · reissue

Inventor

• Michael J. McManus · Fort Collins, US

Key dates

• Filing date: Jan 17, 2007
• Grant date: Dec 7, 2010
• Expiry date: Jan 17, 2027

Classification

• Technology area (CPC —): General

Abstract

Input buffer circuitry that prevents high voltage output from high voltage circuitry from being applied to connected low voltage circuitry. An input of the input buffer circuitry receives signals from the high voltage circuitry. Pinch-off circuitry receives the input signals and prevents voltage above a threshold voltage from being applied to an output of the pinch-off circuitry. Boost circuitry controls the threshold voltage of the pinch-off circuitry and pull-up circuitry draws voltage from the output of the pinch-off circuitry to regulate the control by the booster circuitry.