Ground-Noise Reduction Systems
This paper is not a discussion of any specific commercial ground-noise reduction system, but rather of general principles, and is an effort to formulate a statement of the desired characteristics of a ground-noise reduction system, in terms of such factors as promptness of opening, peak reading, and filtering. In this it is assumed that anticipation is not employed. It is desirable to limit the filtering to a single stage of resistance-capacity filtering (or equivalent). Slow closing helps filtering and peak reading. The better the peak-reading properties of the circuit and the less the filtering delay, the smaller can the margins be made without causing too frequent clipping. — A number of circuits are discussed which have been proposed for improving the filtering without sacrificing quickness of opening or reasonably rapid closing. — In some operations, anticipation is entirely practicable, and if this is done, it appears possible to provide an almost perfect envelope current.
- Print ISSN
- 0097-5834
- Published
- 1941-02
- Content type
- Original Research
- DOI
- 10.5594/J09993