Amplifiers – Signal feedback – From impedance in series with output load
Patent
1978-12-18
1980-11-25
Mullins, James B.
Amplifiers
Signal feedback
From impedance in series with output load
179 1A, 179 1F, 179 1P, 330112, 330149, H03F 126, H03F 134
Patent
active
042361184
ABSTRACT:
In a high-fidelity sound reproducing system wherein the speaker is located remotely from the amplifier and therefore the electrical signals reaching the speaker are subject to distortion from the capacitive and inductive reactance of the conductors joining the amplifier to the speaker, and further subject to pickup of hum and other forms of interference, the distortion of the signal is substantially eliminated by the use of a negative feedback network connected between the input terminal of the load and the input terminal of the amplifier and by a positive feedback network connected between the input terminal of the amplifier and the return terminal of the load, the feedback loops operating on the amplifier to alter its output in such a way that the signal applied at the terminals of the remote speaker more nearly resembles the signal applied as an output to the amplifier.
REFERENCES:
patent: 2922846 (1960-01-01), Humphreys
patent: 3493682 (1970-02-01), Erath
patent: 3525812 (1970-08-01), Verdier
patent: 3838352 (1974-09-01), Dolby et al.
patent: 4092494 (1978-05-01), Micheron
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