Input sampling circuit and method for processing disc read back signal
AssigneeRealtek Semiconductor Corp.
InventorKuang-Yu Yen
Life of this patent
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Abstract
An input sampling circuit for processing a disc read back signal to generate a digital signal includes an auto gain control (AGC) unit for adjusting a gain value of the disc read back signal, a low-pass filter/equalizer (LPF/EQ) coupled to the AGC unit for low-pass filtering/equalizing the disc read back signal to generate an output signal, and an analog-to-digital converter (ADC) coupled to the LPF/EQ for performing analog-to-digital conversion on the output signal across a conversion range that is narrower than a dynamic range of the output signal to convert the output signal into the digital signal.
Claims18
An input sampling circuit for processing a disc read back signal to generate a digital signal, comprising:
- an auto gain control (AGC) unit for adjusting a gain value of the disc read back signal;
- a low-pass filter/equalizer (LPF/EQ) coupled to the AGC unit for low-pass filtering/equalizing the disc read back signal to generate an output signal;
- and
- an analog-to-digital converter (ADC) coupled to the LPF/EQ for performing analog-to-digital conversion on the output signal across a conversion range that is narrower than a dynamic range of the output signal to convert the output signal into the digital signal.
An input sampling method for processing a disc read back signal to generate a digital signal, comprising:
- adjusting a gain value of the disc read back signal;
- low-pass filtering/equalizing the disc read back signal to generate an output signal;
- and
- performing analog-to-digital conversion on the output signal across a conversion range that is narrower than a dynamic range of the output signal to convert the output signal into the digital signal.
Dependencies are inferred from the claim text.