Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of the amplifier
Patent
1977-02-14
1979-07-31
Lucas, Jay P.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of the amplifier
363 39, 363 47, G11B 502, H03H 708
Patent
active
041632648
ABSTRACT:
A magnetic recording and playback apparatus adapted to decrease tape hiss noises, wherein an amplifier power supply circuit or an output circuit for coupling an output from a recording amplifier to a magnetic head is provided with a capacitor block whose internal loss decreases as frequency increases and consisting of a plurality of capacitors. The capacitor block is formed by connecting with an electrolytic capacitor of a large capacitance included in the power supply circuit or output circuit at least one nonpolarized capacitor having a smaller capacitance and smaller internal loss than the electrolytic capacitor.
REFERENCES:
patent: 3015695 (1962-01-01), Claras
patent: 3838452 (1974-09-01), Royce
patent: 3918088 (1975-01-01), Tabuchi
patent: 3968519 (1976-07-01), Yoneya
"Reference Data for Radio Engineers"--Howard W. Sams & Co., N.Y. Sixth Edition, 1975 pp. 5-17ff.
Standard Handbook for Electrical Engineers, McGraw Hill Book Co., 10th Edition, 1974, pp. 4-124.
"Ham Radio" Article, Jun. 1975, pp. 26-31, by Harry Leeming, Radio Frequency Interference, Cause & Care.
Theory of Operation, Manual & Schematics, .COPYRGT.1975, ALTAIR Computer Power Supply.
Radio Amateur's Handbook, .COPYRGT.1975, p. 128, Power Supplies.
Lucas Jay P.
Tokyo Shibaura Electric Co. Ltd.
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