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
US7417501B2 · kind B2 · utility
1Cited by
11References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2006 |
| Grant date | Aug 26, 2008 |
| Priority date | — |
| Expiry date | Apr 28, 2026 |
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.