Low noise multi-stage type amplifier
US5172074A · kind A · utility
10Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 22, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | May 22, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/372
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a low-noise multistage amplifier of this invention, operation currents of amplifiers in respective stages (in particular, first- and final-stage amplifiers) are set so that an optimal signal source reflection coefficient .GAMMA..sub.opt and S parameters are almost not varied by manufacturing variations. The lengths of source stubs connected to FETs of the amplifiers in the respective stages are optimally set in units of stages so that characteristics of the amplifier do not change due to the manufacturing variations, and a sufficient gain can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.