Variable inductor, oscillator including the variable inductor and radio terminal comprising this oscillator, and amplifier including the variable inductor and radio terminal comprising this amplifier
US7190239B2 · kind B2 · utility
5Cited by
9References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2005 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | Aug 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J2200/10
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier comprises an amplifier circuit which comprises a first inductor as an impedance element for degeneration, and a control circuit which has a second inductor electro-magnetically connected to the first inductor, and changes a control current flowing through the second inductor to change an inductance value of the first inductor, thereby changing amplification characteristics of the amplifier circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.