Tuning control for a PVT-compensating tunable impedance circuit
US7301366B1 · kind B1 · utility
13Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2005 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Nov 1, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0278
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A tunable impedance circuit is provided wherein at least one of a plurality of impedance elements is combined with at least another of the plurality of impedance elements to produce a composite impedance. A control voltage is used to determine how many of the impedance elements are to be combined to produce the composite impedance. A current that is substantially invariant over a range of operating conditions is caused to flow through a control impedance to produce the control voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.