Low noise amplifier with low current consumption
US7466199B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 4, 2007 |
| Grant date | Dec 16, 2008 |
| Priority date | — |
| Expiry date | Jul 11, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45702
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to an amplifier circuit comprising supply terminals (12, 14) for supplying the circuit with first and second supply potentials (Vdd, Vss); a current path, which runs from the first supply terminal (12) via a first biased transistor (P1a, P1b), a first node (K1a, K1b), an input transistor (Q1a, Q1b), a second node (K2a, K2b) and a second biased transistor (N1a, N1b) to the second supply terminal (14), wherein a control terminal of the input transistor is loaded with an input signal (inp-inn), and wherein the second node (K2a, K2a) forms a pick-up in a resistor chain (R2a, R1, R2b), at whose ends is supplied an output signal (outp-outn) as a voltage drop; and a feedback stage enabling the current to flow the resistor chain (R2a, R1, R2b) dependent on the input signal (inp-inn) so that the current flowing through the input transistor (Q1a, Q1b) is essentially independent of the input signal (inp-inn), wherein the feedback stage has a pair of complementarily coupled transistors (P3a, N3a, P3b, N3b) with an intervening current output node (K3a, K3b). To increase the scope of application of such an amplifier and achieve a low noise amplification at a low current con…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.