System and method for low-noise amplifier with a high frequency response
US6771124B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 2000 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Aug 4, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G1/0023
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A variable gain low noise amplifier is disclosed that offers flat gain versus frequency throughout the entire cable and broadcast television signal spectrum. The circuit uses multiple stages and buffering techniques to cancel the primary source of high frequency gain degradation. The invention also uses variable capacitor networks which track with gain control to control peaking within the circuit so as to have consistent gain control with frequency and gain. A further aspect of the invention is in the use of capacitors within the circuit to act as simple band-pass filters to roll off segments of the spectrum away from the channel of interest, thus reducing system-level distortion in a receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.