Accession Number : ADD001358
Title : Surface Wave Narrow Bandpass Filter.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C
Personal Author(s) : Writer,Philip L ; Schiff,Maurice L
Report Date : 05 Nov 1974
Pagination or Media Count : 4
Abstract : The patent describes a narrow bandpass filter comprising a surface wave device having a transmission characteristic wherein at a selectable center frequency the transmission goes through a very sharp null. The filter is connected in the negative feedback loop of an amplifier circuit. An input signal at the center frequency will not feed back any signal to the input of the amplifier because of the transmission characteristic. As the frequency moves slightly away from the center frequency, the device will begin to transmit.
Descriptors : *Band pass filters, *Patents, Surface waves, Narrowband
Subject Categories : Line, Surface and Bulk Acoustic Wave Devices
Distribution Statement : APPROVED FOR PUBLIC RELEASE