Signal separating device
US5293173A · kind A · utility
10Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1992 |
| Grant date | Mar 8, 1994 |
| Priority date | — |
| Expiry date | Jan 28, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/1278
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A device for use with an electrically heated window to enable it to be used as a radio antenna has a bifilar wound choke (2) which allows passage of heater current while isolating radio signals from the heater power circuit. The device is connected to radio apparatus via an amplifier (13). The choke (2) and the input of the amplifier (13) are both of relatively low impedance. The choke (2) may be a pot-cored bifilar winding and the amplifier (13) may use a field effect transistor in its input stage connected in grounded gate configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.