Process and device for controlling the operation of a bipolar transistor in class A
US6870427B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2003 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Mar 27, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/32
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The operation of a bipolar transistor is controlled comprising by producing a first voltage that is a product of a static collector current of the bipolar transistor times an emitter resistance. The first voltage is then compared to a predetermined reference voltage to produce a control signal. Current is then injected a base of the bipolar transistor in response to the control signal. In a specific implementation, the first voltage, which is a product of the static collector current (Ic) of the bipolar transistor times its emitter resistance (RE) , is slaved to a predetermined reference voltage (Vref) whose value is substantially equal, to within a tolerance, to 13 mV at a temperature at or about 27° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.