Gain control circuit
Patent 4292596 Issued on September 29, 1981. Estimated Expiration Date: 
August 13, 1999. 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.
August 13, 1999. 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 References3629720 InventorsAssigneeApplicationNo. 06/066239 filed on 08/13/1979US Classes:330/86, Variable impedance in feedback path varied by separate control path330/254, Having gain control means330/282, Having feedback means acting as variable impedance330/284Having attenuation means in signal transmission pathExaminersPrimary: Smith, Alfred E.Assistant: Grigsby, T. N. Attorney, Agent or FirmInternational ClassH03G 3/00 (20060101)Foreign Application Priority Data1978-08-11 JPAbstractA circuit for varying the gain of an amplifier circuit linearly in decibel by the use of a digital code signal varying linearly, wherein a resistance network to be connected between an amplifier having a fixed gain and an input or output portion for the amplification is connected and the gain of the amplifier as well as the values of resistance elements constituting the resistance network is set so that the transfer function of the amplifier circuit may become: ##EQU1## .Other References
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