Bias circuit and amplifier using the same
US7733186B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2009 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Mar 16, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45244
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A bias circuit including: a first current source which generates a first current; a second current source which generates a second current having a temperature-to-output current characteristic that an output current characteristic increases or decreases with a change in temperature to intersect with that of the first current; a first current-voltage conversion circuit which converts the first current to a first voltage; a second current-voltage conversion circuit which has an input terminal and converts a current inputted into the input terminal to a second voltage; a comparison circuit which compares the first voltage and the second voltage and generates a third current according to a result of the comparison; an addition unit which adds the third current to the second current and inputs a resulting current to the input terminal; and a voltage-current conversion circuit which converts the second voltage to a fourth current for bias.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.