Negative impedance circuit for reducing amplifier noise
US11228283B2 · kind B2 · utility
0Cited by
4References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2020 |
| Grant date | Jan 18, 2022 |
| Priority date | — |
| Expiry date | Apr 6, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45276
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit includes a first operational amplifier having an inverting input and a non-inverting input, and a negative resistance circuit connected to the inverting input of the operational amplifier. The negative resistance circuit includes a second operational amplifier, a current source controlled by the second operational amplifier, and a cross-coupled transistor circuit having at least one transistor biased by a current produced by the current source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.