Amplifiers – With power or bias voltage supply – For anode
Patent
1990-02-16
1991-07-30
Mullins, James B.
Amplifiers
With power or bias voltage supply
For anode
330297, 333181, H03F 3181
Patent
active
050362925
ABSTRACT:
A filter capacitor network includes an inductor connected in series with an aluminum electrolytic capacitor with the inductor and aluminum electrolytic capacitor bypassed with a capacitor having relatively better high frequency performance characteristics than the aluminum electrolytic capacitor. The inductor decouples the aluminum capacitor from the network at middle and upper frequencies so that the bypass capacitor dominates the characteristics of the network in that range. A signal coupling/DC blocking capacitor network of the same configuration is also disclosed. An amplifier design includes the filter network in the power supply. The filter network is also disclosed in an audio signal path for use in signal coupling/DC blocking.
REFERENCES:
patent: 2759051 (1956-08-01), Lockwood et al.
patent: 3290578 (1966-12-01), Ainsworth
patent: 3746963 (1973-06-01), VeNard, II
patent: 4232272 (1980-11-01), Fabri
patent: 4639663 (1987-01-01), Ueno et al.
patent: 4764736 (1988-08-01), Usui et al.
"The Sonic Importance of Passive Parts", pp. 1-13, Pub. Sep. 1981, International Audio Review Hotline!, #13.
"Unregulated Power Supplies and Power Amplifiers", pp. 194-210, No. 1 & 2, pub. Jul. 1976, International Audio Review.
"Picking Capacitors", by W. G. Jung & R. Marsh, pp. 52-62, Pub. Feb. 1980, Audio.
Hjelm John R.
Larson Richard D.
Audio Research Corporation
Mullins James B.
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