Development of Channel Filter Having Sin X/X Frequency Response.
Abstract
A System Transfer Function can be synthesized from a bank of sin x/x filters tuned to adjacent frequecy channels covering the bandwidth of interest where x is proportional to frequency deviation from filter center frequency. Such a filter bank can also be used for the correction of distortion resulting from dispersive networks, provided each filter of the bank is weighted and phased properly. A sin x/x filter has been designed and constructed for input and output near 70 MHz. It uses a quartz surface acoustic wave delay line by combining the delayed and undelayed signals, which alternately cancel and reinforce to produce the sin x part of the function. The 1/x response is produced by down-converting and using an R-C integrator in each of two quadrature channels. The result is up-converted to the 70 MHz vicinity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1973
- Accession Number
- AD0914010
Entities
People
- Arthur J. Hannum
- Lee A. Morgan
- Steven Weisbrod
Organizations
- Teledyne Technologies