Equalizer filters including a low-pass filter unit and an equalizer having a group delay control unit and related methods
AssigneeSamsung Electronics Co., Ltd.
InventorYun-Cheol Han
Life of this patent
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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.
Claims25
A filter for an equalizer, the filter comprising:
- a first low-pass filter unit that is configured to receive an input signal;
- and
- an equalization unit that is configured to receive an output signal of the first low-pass filter unit and that is configured to amplify the received output signal with a variable gain value,
- wherein the equalization unit comprises a plurality of serially connected biquad low-pass filter units, and is configured to control a value of a capacitor of the last of the plurality of biquad low-pass filter units to control a group delay value that is generated during equalization.
A filter for an equalizer, the filter comprising:
- an equalization unit that includes a plurality of serially connected biquad low-pass filters and an adjustable capacitor, wherein the equalization unit is configured to amplify an input signal with a variable gain and to control a group delay value that is generated during equalization;
- and
- a filter having an output that is connected to an input of the equalization unit.
A method of processing an output signal of an optical pick-up unit, the method comprising:
- passing the output signal of the optical pick-up unit through a filter;
- adjusting a value of a capacitor of an equalization unit to reduce a group delay characteristic of the equalization unit for the filtered output signal;
- and
- passing the filtered output signal through the equalization unit.
Dependencies are inferred from the claim text.