Equalizer filters including a low-pass filter unit and an...

Details Equalizer filters including a low-pass filter unit and an... Equalizer filters including a low-pass filter unit and an...

2008-08-29

2010-06-08

Zweizig, Jeffrey S (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

Reexamination Certificate

active

07733166

ABSTRACT:
Provided is a filter used for an equalizer, the filter including: a first low-pass filter unit receives an input signal and performs low frequency band filtering on the input signal; and an equalization unit that receives an output signal from the first low-pass filter unit. The equalization unit may comprise a plurality of serially connected biquad low-pass filter units, and may control a value of a capacitor that is used to control a group delay value that is generated during equalization. Thus, the filter can compensate for group delay without including a separate all pass filter, thereby reducing surface area and power consumption.

REFERENCES:
patent: 6373332 (2002-04-01), Kawai
patent: 06-276050 (1994-09-01), None
patent: 08-298436 (1996-11-01), None
patent: 2002-008314 (2002-01-01), None

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