Synchronous separation circuit
US4635115A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1984 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Nov 2, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A synchronous separation circuit comprises a capacitor, one end of the capacitor serving as an input terminal for receiving a synthetic video signal, a first C-MOS inverter, an input terminal of which is connected to the other end of the capacitor, a first resistor, one end of which is connected to the other end of the capacitor, a diode, one end of which is connected to the other end of the capacitor, and a second C-MOS inverter, an input terminal of which is connected to the other end of the diode, while an output terminal of which is connected directly or through a second resistor to the input terminal of the second C-MOS inverter, wherein when the synthetic video signal has positive characteristics, a potential at the other end of the first resistor is set to a value equal to or lower than a potential at the input terminal of the second C-MOS inverter, and when the synthetic video signal has negative characteristics, the potential at the other end of the first resistor is set to a value equal to or higher than the potential at the input terminal of the second C-MOS inverter, so as to provide a direct current bias voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.