ECL-compatible input/output circuits in CMOS technology

US4841175A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Erik De Man · Hersbruck, DE
• Stefan Meier · Neubiberg, DE

Key dates

• Filing date: Oct 21, 1987
• Grant date: Jun 20, 1989
• Expiry date: Oct 21, 2007

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03K19/0948
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

ECL-compatible input/output circuits in CMOS technology which meet very strict ECL level demands and are as independent as possible of temperature and field effect transistor parameter fluctuations. This is achieved by a control circuit for reference currents of the current mirror circuits. The control circuit is composed of a sensor stage, of a comparator, of a low-pass filter and of a reference current source. Current mirror circuits are also utilized in the driver stages and in the sensor stage.