Broadband linear transconductance amplifier with resistive pole-splitting compensation
US5917379A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Jul 31, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45496
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A compensation scheme for differential- or single-input transconductance amplifiers relies on an active feedback path with a resistive pole-splitting compensation circuit. The resistive compensation circuit causes pole-splitting of the two dominant poles, moving one pole to a slightly lower frequency and the other to a much higher frequency compared to the dominant poles of the uncompensated amplifier. A DC-blocking capacitor may also be placed in series with the resistor of the compensation circuit to allow for proper biasing of the circuit. By selecting appropriate values for the passive elements in the compensation circuit, the compensation scheme of the present invention can cause the amplifier to operate in a stable, linear manner over the same or even a larger bandwidth than an equivalent amplifier without compensation. The present invention does not suffer the problems of standard narrowbanding compensation schemes associated with high frequency cut-off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.