Bias circuits and signal amplifier circuits
US7525388B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2007 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Jun 12, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/0288
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A bias circuit includes a transistor having a control gate, a first terminal and a second terminal coupled to a ground level, a first resistor coupled to the control gate, a first capacitor coupled between an input signal and the first resistor, a diode coupled between a connection point of the first capacitor and the first resistor, and the ground level, a second capacitor coupled between the control gate and the ground level, a second resistor coupled between the control gate and the ground level, a third resistor coupled between the control gate and a predetermined voltage, a fourth resistor coupled between the predetermined voltage and the first terminal, and a fifth resistor coupled between the first terminal and a bias signal. A current through the transistor corresponds to the input signal, and the bias signal is generated according to the current through the transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.