H - Electricity – 04 – R
Patent
H - Electricity
04
R
330/105, 179/38,
H04R 3/04 (2006.01) H03F 1/48 (2006.01) H03F 3/183 (2006.01) H03F 3/68 (2006.01) H03G 5/02 (2006.01) H03H 11/12 (2006.01)
Patent
CA 1124653
- 16 - Abstract of the Disclosure A frequency characteristic-adjusting apparatus comprising a filter circuit formed of a first variable gain amplifier and a capacitor, a second variable gain amplifier for amplifying an output signal from the filter circuit, an amplifier for amplifying a signal denoting a difference between the amplitudes of an input signal to the filter circuit and an output signal therefrom, and an adder circuit for adding together output signals from the second variable gain amplifier and difference signal amplifier, and wherein the first and second gain amplifiers are connected to potentio- meters, and the gains of the first and second variable gain amplifiers are varied in accordance with changes in the voltage supplied from the potentiometers to the amplifiers, while maintaining the prescribed relationship between the gains of the first and second variable gain amplifiers.
339518
Ridout & Maybee Llp
Tokyo Shibaura Denki Kabushiki Kaisha
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