Low noise impedance-matched video amplifier
US5374966A · kind A · utility
10Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1993 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Apr 15, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/148
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video amplifier having a reduced noise figure is realized by eliminating the need for a resistive matching termination at the input of the amplifier. A negative feedback loop reduces the effective input impedance of the amplifier by generating an active impedance at the input of the amplifier. Because the input impedance of the amplifier is actively matched to the output impedance of the video signal generator, a noise-generating resistive termination is unnecessary, and the noise figure of the overall impedance-matched amplifier is significantly reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.