Design and Use of Noise-Reduction Bias Systems
The factors underlying the design and use of biased recording systems are described. In order to minimize noise and “shutter bump” special precautions in filtering must be taken. Suitable values for “attack” and “release” times are dependent upon the type of recording, margin settings, and reproducing conditions. Comparison of variable-density and variable-area requirements is made. Methods used in designing the rectifiers, filters, and other circuit details are given and the application to a new equipment known as the RA-1124 Noise-Reduction Unit is shown.
- Print ISSN
- 0097-5834
- Published
- 1942-02
- Content type
- Original Research
- DOI
- 10.5594/J09926
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