Low-noise signal amplifying circuit and method thereof
US8872590B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 6, 2013 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Jun 7, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/294
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A signal amplifying circuit includes: a first transistor having a first connecting terminal coupled to an input signal, and a controlling terminal coupled to a first reference voltage; an adjustable resistive circuit having a first terminal coupled to a second connecting terminal of the first transistor; and a second transistor having a first connecting terminal coupled to a second terminal of the adjustable resistive circuit, a controlling terminal coupled to a second reference voltage, and a second connecting terminal for outputting an output signal corresponding to the input signal; wherein a resistance of the adjustable resistive circuit is adjusted to make an input impedance looking into the first transistor from the first connecting terminal equal a predetermined impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.