System and method for a switchable capacitance

US9584097B2 · kind B2 · utility

Assignee

• Infineon Technologies AG · DE

Inventor

• Winfried Bakalski · Birkenfeld, DE

Key dates

• Filing date: Apr 29, 2014
• Grant date: Feb 28, 2017
• Expiry date: Oct 9, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03J2200/10
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

In accordance with an embodiment, a switchable capacitance circuit includes a plurality of capacitance-switch cells that each have a capacitance circuit having a capacitance between a first terminal and a second terminal of the capacitance circuit, and a semiconductor switching circuit including a first terminal coupled to the first terminal of the capacitance circuit, a plurality of series connected radio-frequency (RF) switch cells having a load path and a common node. Each of the plurality of series connected RF switch cells has a switch transistor and a gate resistor having a first end coupled to a gate of the switch transistor and a second end coupled to the common node. The switchable capacitance circuit also includes a resistance circuit having a first end coupled to the common node and a second end coupled to a control node.