Suppressed carrier automatic gain control circuitry
Patent 4048566 Issued on September 13, 1977. Estimated Expiration Date: 
September 13, 1994. 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.
September 13, 1994. 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 References 3005094 3084329 3611145 InventorsApplicationNo. 05/646729 filed on 01/05/1976US Classes:455/202, Suppressed carrier455/240.1, Variable automatic gain control loop gain455/265With local oscillator synchronization or lockingExaminersPrimary: Griffin, Robert L.Assistant: Ng, Jin F. Attorney, Agent or FirmAbstractAn automatic gain control (hereinafter referred to as AGC) circuitry is used in conjunction with a Costas loop detector to provide positive gain control during the acquisition and tracking modes of the operation of a receiver. The circuitry includes circuitry for deriving a noise estimate signal from one channel of the Costas loop and circuitry for subtracting the noise estimate signal from the data and noise signal combination in the other channel of the Costas loop for providing the automatic gain control signal to prevent false locking. | |
