Semiconductor amplifier circuit
US4539529A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1983 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | Sep 15, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45071
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A semiconductor amplifier circuit includes first and second operational amplifiers, and first and second voltage dividers connected between the outputs of the first and second operational amplifiers, respectively, and a reference potential source. First and second resistors are connected between the divider point of the first and second voltage dividers, respectively, and the inverting input of the first and second operational amplifiers, respectively, forming real negative feedbacks. A first signal input terminal of the amplifier circuit is connected to the non-inverting input of the first and second operational amplifiers, respectively. A third common voltage divider is connected between the reference potential source and a supply potential source. A common intermediate resistor is connected to the divider point of the common voltage divider, and first and second supply resistors are connected in series with the intermediate resistor. The first and second supply resistors are connected between the intermediate resistor and the non-inverting input of the first and second operational amplifiers, respectively. The first resistor has a resistance substantially equal to the sum of the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.