FM-Receiver with transmitter characterization
Patent 4393273 Issued on July 12, 1983. Estimated Expiration Date: 
January 19, 2001. 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.
January 19, 2001. 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 ReferencesRadio broadcasting system with code signalling Radio broadcasting system with transmitter identification Method of synchronizing a quadphase receiver and clock synchronization device for carrying out the method Patent #: 4276650 InventorsApplicationNo. 06/226561 filed on 01/19/1981US Classes:381/4, AM subcarrier375/359Self-synchronizing signal (self-clocking codes, etc.)ExaminersPrimary: Pellinen, A. D.Attorney, Agent or FirmInternational ClassesH04H 1/00 (20060101)H04L 7/033 (20060101) Foreign Application Priority Data1980-01-31 NLAbstractAn FM-receiver with transmitter characterization, having a tuning unit, an IF-amplifier, a demodulation circuit for demodulating a discrete transmitter characterization signal, a clock regeneration circuit, a decoding device for decoding the discrete transmitter characterization signal and a signal processing unit. The clock regeneration circuit regenerates a clock signal the period of which is obtained by dividing the frequency of the stereo pilot signal. Synchronization of the clock signal phase with the phase of the clock signal used in the transmitter is carried out by detecting, using of a periodic window signal, the average phase of the code edges in the discrete transmitter characterization signal and by choosing the phase of the regenerated clock signal to be equal thereto. | |
