Compandor apparatus
Patent 4114115 Issued on September 12, 1978. Estimated Expiration Date: 
November 4, 1996. 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.
November 4, 1996. 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 3769611 3795876 3903485 Signal compressors and expanders Real time amplitude control of electrical waves Patent #: 4025723 InventorAssigneeApplicationNo. 05/738835 filed on 11/04/1976US Classes:333/14, AMPLITUDE COMPRESSION AND EXPANSION SYSTEMS (I.E., COMPANDERS)330/132, Frequency selective means to select control signal from amplifier channel330/141, Time constant circuit in bias control circuit330/85, Amplifier in signal feedback path330/86Variable impedance in feedback path varied by separate control pathExaminersPrimary: Gensler, PaulAttorney, Agent or FirmInternational ClassesH03G 9/02 (20060101)H04B 1/64 (20060101) H03G 9/00 (20060101) H04B 1/62 (20060101) AbstractCompandor apparatus including a compressor comprised of an operational amplifier having a plurality of gain controlling feedback paths that are respectively responsive to different portions of the input frequency spectrum, and an expandor comprised of an operational amplifier having a plurality of gain controlling circuits that are respectively responsive to different portions of the input frequency spectrum. | |
