Providing controllable impedance at a reference plane in a circuit
US6930564B2 · kind B2 · utility
6Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 4, 2003 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Jan 20, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3191
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for providing a controllable impedance at a reference plane in a circuit comprises a unidirectional transmission line loop having first and second input/output terminals. The first input/output terminal is connected to the reference plane and an amplifier is located in the transmission line loop to amplify signals passing in a direction from the second input/output terminal to the first input/output terminal. A variable tuned circuit couples the second input/output terminal to a terminating device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.