Amplifier circuit
US8154348B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 31, 2010 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Aug 31, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/402
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier circuit operating at a fundamental angular frequency •0, includes: a transistor which is represented by an equivalent circuit which includes: an equivalent output current source, a drain-source capacitor as a parallel parasitic capacitor to an output node of the equivalent output current source, and a drain inductor as serial parasitic inductor connected between the equivalent output current source and a drain output node; a harmonic frequency processing circuit which includes an input node connected with the drain output node and an output node; a resonant circuit section provided between the output node of the harmonic frequency processing circuit and a ground node and comprising (2n+1) resonators which have resonance frequencies different from each other; and a load resistance provided in a back stage of the harmonic frequency processing circuit. The resonance frequencies of the (2n+1) resonators are coincident with frequencies of (n+1) poles and n zeros formed between the drain output node and the ground node in the transistor when the output node of the harmonic frequency processing circuit is short-circuited to the ground node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.