Equalizing circuit amplifying bass range signal

Details Equalizing circuit amplifying bass range signal Equalizing circuit amplifying bass range signal

2004-10-01

2008-12-16

Chin, Vivian (Department: 2615)

Electrical audio signal processing systems and devices

Including frequency control

Having automatic equalizer circuit

C333S02800T, C381S098000

Reexamination Certificate

active

07466830

ABSTRACT:
A low-frequency eliminating unit outputs a signal derived from attenuating the extreme bass range in an input audio signal, so as to reduce bass distortion. A high-frequency retrieving unit retrieves, from the signal output from the low-frequency eliminating unit, signal components at frequencies higher than the marginal frequency. A front low-pass filter and a back low-pass filter retrieve, from the signal output from the low-frequency eliminating unit, components other than the signal retrieved by the high-frequency retrieving unit. An amplifying unit amplifies a signal output from the low-frequency retrieving unit. A synthesizing unit synthesizes a signal output from the high-frequency retrieving unit and a signal output from the amplifying unit.

REFERENCES:
patent: 5330769 (1994-07-01), McKinzie et al.
patent: 5872830 (1999-02-01), Herrnsdorf
patent: 6718039 (2004-04-01), Klayman et al.
patent: 7043031 (2006-05-01), Klayman et al.
Peter Kruger, “Microcomputer-controlled audio preamplifier”, Electronics & Wireless World, Jun. 1989, pp. 584-587.

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