Layout for a high voltage darlington pair

US5541439A · kind A · utility

Assignee

• Xerox Corporation · US

Inventors

• Mohamad M. Mojaradi · Los Angeles, US
• Guillermo Lao · Torrance, US
• Steven A. Buhler · Redondo Beach, US
• Tuan A. Vo · Albany, US

Key dates

• Filing date: Nov 17, 1994
• Grant date: Jul 30, 1996
• Expiry date: Nov 17, 2014

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10D84/642

Abstract

There is disclosed a layout of a high voltage Darlington pair in which a circular field plate is utilized for both high voltage transistors in order to reduce the layout area. In this layout, both transistors of a Darlington pair are circular transistors and they both have a common center. This enables both high voltage transistors to share one field plate ring and one collector ring.