Switching system to short-circuit a load with minimum residual voltage

US4004160A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Klaus Streit
• Karl Staiger
• Gerhard Conzelmann · Echterdingen, DE
• Hartmut Seiler · Reutlingen, DE
• Karl Nagel · Gomaringen, DE

Key dates

• Filing date: Sep 12, 1974
• Grant date: Jan 18, 1977
• Expiry date: Sep 12, 1994

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03K17/602
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A controlled main switch, typically a semiconductor switch, is connected in parallel to the load. In accordance with the invention, an auxiliary switch, typically also a semiconductor switch such as a switching transistor is directly connected across the terminals of the load, and with an impedance, for example a resistance, diode, or Zener diode to the main switch, and controlled to switch in synchronism with the main switch, so that the residual voltage across the load due to inherent voltage drop across the terminals of the switch becomes a minimum. Integrated technology may be used, combining preamplifiers and distribution networks in one monolithic chip.