Amplifier circuit
US8134602B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Dec 22, 2008 |
| Grant date | Mar 13, 2012 |
| Priority date | — |
| Expiry date | May 5, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45528
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a first operational amplifier, an input signal is input to the negative input terminal, a reference voltage is input to the positive input terminal, a feedback path from the output terminal to the negative input terminal is formed, and the input signal is amplified by a predetermined amplification factor. In a second operational amplifier, an output from the first operational amplifier is input to the positive input terminal, the reference voltage is input to the negative input terminal, and a pair of outputs having opposite polarities to each other and used for performing BTL drive of a load are obtained at the output terminal. Using the above arrangement, a low-frequency signal can be amplified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.