High frequency amplifier bias circuit, high frequency power amplifier, and communication device
US6566954B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 2001 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Jun 4, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/294
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In the high frequency amplifier bias circuit, an emitter-follower-transistor, which serves to supply a bias electric current corresponding to a control input voltage input from outside, is connected to a base of the transistor for amplification. The transistor for current control is connected in series to emitter of the transistor for bias supply, and bypasses electric current corresponding to the control input voltage. Electric current corresponding to the control input voltage flows through the first transistor for temperature compensation. Electric current corresponding to electric current flowing through the first transistor for temperature compensation flows through the transistor for current control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.