Loudness control circuit for selectively emphasizing both high f

Details Loudness control circuit for selectively emphasizing both high f Loudness control circuit for selectively emphasizing both high f

1992-04-22

1993-07-13

Ng, Jin F.

Electrical audio signal processing systems and devices

Including amplitude or volume control

455267, H03G 300, H04B 106

Patent

active

052280918

ABSTRACT:
A loudness control circuit having a sound volume adjusting variable resistor with a center tap is provided. The loudness control circuit has a buffer circuit of low output impedance having an input terminal to which a sound signal is applied through a high frequency coupling capacitor. The output terminal of the buffer circuit is connected through a series circuit of a low frequency blocking capacitor, a protective resistor and a shunt resistor to the center tap of the sound volume adjusting variable resistor. The connecting point of the protective resistor and the shunt resistor is grounded through an electronic switching element. The electronic switching element is turned on and off for the on-off control of loudness.

REFERENCES:
patent: 4320534 (1982-03-01), Sakai et al.

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