Semi-Active Notch Filter.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1982
- Accession Number
- ADD010130
Entities
People
- Daniel G. Jablonski
Organizations
- United States Department of the Navy