Automatic 3-mode switching circuit of a color television set
Patent 5119177 Issued on June 2, 1992. Estimated Expiration Date: 
July 31, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 31, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesTelevision receiver circuit arrangement for identifying the standard Multi-system television receiver Color television standard identification circuit Patent #: 4933749 InventorAssigneeApplicationNo. 560737 filed on 07/31/1990US Classes:348/557, Color processing348/558, Format detection348/643Color killerExaminersPrimary: Shepperd, John W.Foreign Patent References
International ClassH04N 005/46Foreign Application Priority Data1989-07-31 KRAbstractAn automatic 3-mode switching circuit of a color television set for automatically changing into a suitable system according to broadcasting signals of the broadcasting systems, i.e., PAL-N, NTSC, PAL-M systems, which comprises a color killing section, a color existence/non-existence discriminating section, a vertical synchronization signal processing section, a 50/60 Hz discriminating section, a control section, a switching section, a NTSC color demodulating section and a NTSC oscillation section, a PAL-M color demodulating section, a PAL-N color demodulating section and a PAL-N oscillation section, and a voltage controlling section. | |
