Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Patent
1994-08-17
1996-11-12
Kuntz, Curtis
Electrical audio signal processing systems and devices
Including frequency control
Having automatic equalizer circuit
381101, 381102, 381104, H03G 500
Patent
active
055747922
ABSTRACT:
The invention is a volume and tone control circuit for audio sets which will not distort a signal when the volume is adjusted to maximum regardless of the tone. The circuit has a volume control in the form of a variable resistor with an intermediate fixed terminal, one end connected to an input terminal, the other end grounded, and a movable contact connected to an output terminal; an attenuation circuit connected to said input terminal; and, a tone control circuit connected between the output of said attenuation circuit and the intermediate fixed terminal. The degree of attenuation of the attenuation circuit is set so that the maximum gain of the attenuation circuit and the tone control circuit does not exceed 1. The position of the intermediate fixed terminal is determined so that amplitude-versus-frequency characteristics of the output signal become flat when the movable contact of volume control is set to maximum. The circuit will not distort a signal even at maximum volume, maintaining maximum gain of low and high pitched sounds.
REFERENCES:
patent: 2837635 (1958-06-01), Epperson
patent: 4227048 (1980-10-01), Nagata
patent: 5127058 (1992-06-01), Yamasaki
patent: 5371803 (1994-12-01), Williamson
Kuntz Curtis
Matsushita Electric - Industrial Co., Ltd.
Oh Minsun
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