Cascade Connection of 90-Degree Phase-Shift Networks
- 1 March 1952
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IRE
- Vol. 40 (3) , 334-337
- https://doi.org/10.1109/jrproc.1952.273793
Abstract
A method of connecting 90-degree audio phase-difference networks for use in selective-sideband transmission and reception is shown, whereby an over-all performance is obtained which is analogous to the cascade operation of conventional filters. Three networks are required to obtain twice the rejection in decibels of one. For best results two of the networks must be accurately matched. The cascade connection may either be used with three identical networks to deepen the rejection obtainable with one network over the design range, or it may be used with two similar and one dissimilar network to extend the frequency range over which a given rejection may be obtained.Keywords
This publication has 3 references indexed in Scilit:
- Polyphase modulation as a solution of certain filtration problems in telecommunicationProceedings of the IEE - Part III: Radio and Communication Engineering, 1950
- Realization of a Constant Phase DifferenceBell System Technical Journal, 1950
- A new single-side-band carrier systemElectrical Engineering, 1947