Coupling circuit, driver circuit and method for controlling a coupling circuit
US8669805B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2010 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Aug 27, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/018557
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A coupling circuit has a first and a second transistor (P1, P2) of a p-channel field-effect transistor type. A drain terminal of the first transistor (P1) is connected to a signal input (1), source terminals of the first and the second transistor (P1, P2) are commonly connected to a signal output (2), bulk terminals of the first and the second transistor (P1, P2) are commonly connected to a drain terminal of the second transistor (P2), and a gate terminal of the first transistor (P1) is connected to a gate terminal of the second transistor (P2). The coupling circuit further comprises a gate control circuit (10) with a charge pump circuit (110) which is configured to generate a negative potential. The gate control circuit (10) is configured to control a gate voltage at the gate terminals of the first and the second transistor (P1, P2) based on a negative potential.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.