1981-03-09
1983-07-26
Rubinson, G. Z.
H04R 906
Patent
active
043955886
ABSTRACT:
A device for driving an electroacoustic transducer (1) comprising a feedback amplifier and a pickup (2) whose output signal is a measure of the acoustic output signal of the transducer. A by-pass network (4) bypasses at least the transducer and the pickup and produces an output signal that for frequencies outside the operating range of the transducer is large and for frequencies in the operating range (f.sub.1 to f.sub.h) of the transducer is small relative to the pickup output signal. The sum of the output signals of the pickup and the by-pass network serves as a feedback signal. This widens the transducer frequency range and reduces distortion. The device may include a limiter (11) and a network (5) before the transducer. The network has a frequency response inverse to that of the signal path from the electroacoustic transducer to the pickup to provide an additional reduction in the distortion.
REFERENCES:
patent: 3798374 (1974-03-01), Meyers
patent: 3889060 (1975-06-01), Goto
patent: 3937887 (1976-02-01), Miller
patent: 4180706 (1979-12-01), Bakgaard
patent: 4276443 (1981-06-01), Meyers
patent: 4287389 (1981-09-01), Gamble
de Haan, administrator Friedrich J.
Franssen, deceased Nico V.
Kaizer Adrianus J. M.
Wesche Cornelis A. M.
Franzblau Bernard
Mayer Robert T.
Rubinson G. Z.
Schroeder L. C.
U.S. Philips Corporation
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