Method and apparatus for deriving power from a clock signal coupled through a transformer
US6008681A · kind A · utility
12Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1998 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Jun 2, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transformer driver circuit connected to the primary or "system" side of a transformer has a system clock connected to an input thereof the system clock having a frequency selected to constitute the desired clock frequency of a CODEC circuit located on the secondary or "line" side of the transformer. A signal line is connected to a point on the secondary of the transformer so as to tap the system clock frequency, whereby both the system clock and the source voltage for the CODEC are derived from the transformer's secondary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.