Bias circuit and amplifier
US9294044B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2014 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | Mar 14, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/78
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A bias circuit according to an embodiment is a bias circuit that supplies a bias voltage to an amplifying element. The bias circuit of the embodiment includes a first current source that has a characteristic of varying an output current with the surrounding temperature variations, and a second current source that has a different output characteristic from the first current source and that can control the output current. The bias circuit of the embodiment also includes a comparator for comparing the output current of the first current source with the output current of the second current source, and a bias supply part that controls the output current of the second current source on the basis of the comparison result of the comparator and supplies a bias voltage to the amplifying element in accordance with the comparison result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.