Amplifiers – Signal feedback – Phase shift means in loop path
Patent
1981-11-12
1984-03-27
Mullins, James B.
Amplifiers
Signal feedback
Phase shift means in loop path
330 86, 330282, 330294, 330304, 333 28T, H03G 504
Patent
active
044397399
ABSTRACT:
A low-noise bass-control device, which is digitally controllable in a simple manner, comprises an amplifier having an output connected to the series arrangement of a capacitor and a tapped resistor chain. The taps on said resistor chain are connected to an inverting input of the amplifier via a first switch and to the output of the control device via a second switch.
REFERENCES:
patent: 3500316 (1970-03-01), Brown
patent: 4099134 (1978-07-01), Schroder
patent: 4363001 (1982-12-01), Suzuki et al.
Dijkmans Eise C.
Graffenberger Wilhelm
Kilian Ernst A.
van de Plassche Rudy J.
Fronzblau Bernard
Mayer Robert T.
Mullins James B.
U.S. Philips Corporation
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