Method of and apparatus for biasing switches
US9667244B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2015 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Nov 16, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/693
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A control circuit is provided for controlling the voltage at the gate terminal of a field effect transistor acting as a switch. The voltage, at for example, the source terminal of the transistor can be provided to a low pass filter and is then voltage translated to provide the gate signal. The filtering can be arranged so as to compensate for the effect of parasitic capacitances within the transistor, thereby linearizing its frequency response. The voltage translation can help to limit voltage differences between the gate and channel of the transistor. This can be significant as relatively fast transistors, as might be used in microwave circuits, may fail with relatively modest voltages at their gates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.