Control of input bias current modulation in amplifiers
US11722104B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2021 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Aug 31, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/453
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Examples of amplifiers use current-replication transistors and a separation circuit coupled to such transistors to separate error current components from other current components in a pre-driver of an amplifier. In response to driving the current-replication transistors with the separated error current components, replica base current components that approximate error-modulation components of the pre-driver base currents are generated. Replica-current subtraction circuitry coupled to the current-replication transistors then subtract the replica base current components from the pre-driver base currents, affecting cancellation of the error-modulation components of the pre-driver base currents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.