Amplifiers – With semiconductor amplifying device – Including signal feedback means
Patent
1995-09-05
1998-03-03
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including signal feedback means
330305, 330306, 330107, H03F 134, H03F 3181
Patent
active
057240060
ABSTRACT:
A circuit arrangement which has a controllable transmission characteristic between a signal input (2) and a signal output (5) for a signal within a given transmission frequency band, the circuit arrangement having a bass control stage (1) to which the signal from the signal input (2) can be applied for adjustably boosting the amplitude-frequency response of the signal at low frequencies of the transmission frequency band. A higher flexibility and an improved transmission characteristic of such a circuit arrangement are obtained with a simplified construction by a notch filter stage (3), to which the signal processed in the bass control stage (1) can be applied for attenuating the amplitude-frequency response of the signal at mid-frequencies of the transmission frequency band independently of the bass control stage (1) and by which the signal thus processed can be applied to the signal output.
REFERENCES:
patent: 3860876 (1975-01-01), Woods
patent: 5515446 (1996-05-01), Velmer
"Radio Fernsehen Elektronik", vol. 28, No. 12, 1979, Integrierte Lautstarke pp. 751 to 757. no month.
Kilian Ernst-August
Moller Christoph
Goodman Edward W.
Mullins James B.
U.S. Philips Corporation
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