Accession Number : ADD010130

Title :   Semi-Active Notch Filter.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Jablonski,Daniel G

Report Date : 30 Nov 1982

Pagination or Media Count : 16

Abstract : A plurality of passive filters in combination with a corresponding plurality of operational amplifiers form an individual series of quasi low-pass, bandpass, and quasi high-pass filters which when their outputs are summed in an operational amplifier summer, constitute a semi-active notch filter having a low frequency phase shift of substantially zero, and a notch frequency which can be adjusted independently of the low frequency phase shift. The existence of the notch is also independent of the properties and limitations of the operational amplifiers used. (Author)

Descriptors :   *Patent applications, *Electric filters, *Semiactive systems, *Simulators, *Josephson junctions, High pass filters, Operational amplifiers, Phase shift, Passive systems, Low frequency, Filters, Frequency

Subject Categories : Electrical and Electronic Equipment
      Quantum Theory and Relativity

Distribution Statement : APPROVED FOR PUBLIC RELEASE