초록 ▼

A very high digital subscriber line (VDSL) receiver, and a programmable gain amplifier (PGA) and a narrow-band noise remover thereof. The VDSL receiver includes: a first programmable gain amplifier (PGA) for controlling gain to output a signal having a predetermined amplitude and amplifying the inpu

A very high digital subscriber line (VDSL) receiver, and a programmable gain amplifier (PGA) and a narrow-band noise remover thereof. The VDSL receiver includes: a first programmable gain amplifier (PGA) for controlling gain to output a signal having a predetermined amplitude and amplifying the input signal according to the controlled gain; a narrow-band noise remover for detecting the narrow-band noise from the output signal of the first PGA, modeling the narrow-band noise to remove the noise from the output signal of the first PGA if the narrow-band noise is detected, and outputting the inherent output signal of the first PGA if the narrow-band signal is not detected; a second PGA for amplifying the output signal from the narrow-band noise remover based on the gain controlled by the first PGA if narrow-band noise exists, and outputting the inherent output signal of the narrow-band noise remover without amplification if narrow-band noise is not detected; an equalizer for compensating for the deteriorated characteristics of the output signal from the second PGA; and a slicer for converting the output signal of the equalizer into a digital signal. Thus, a desired level of the input signal can be maintained against sudden inflow of an external interference signal, so that error generated by sudden change in power can be prevented. Accordingly, a VDSL system adopting the receiver can function normally regardless of inflow of a high-power signal.

대표청구항 ▼

1. A very high speed digital subscriber line (VDSL) receiver for processing an input signal to which a narrow-band noise is inflowed, for high-speed transmission, the receiver comprising:a first programmable gain amplifier (PGA) for controlling gain to output a signal having a predetermined amplitud

1. A very high speed digital subscriber line (VDSL) receiver for processing an input signal to which a narrow-band noise is inflowed, for high-speed transmission, the receiver comprising:a first programmable gain amplifier (PGA) for controlling gain to output a signal having a predetermined amplitude and amplifying the input signal according to the controlled gain; a narrow-band noise remover for detecting the narrow-band noise from the output signal of the first PGA, modeling the narrow-band noise to remove the noise from the output signal of the first PGA if the narrow-band noise is detected, and outputting the inherent output signal of the first PGA if the narrow-band signal is not detected; a second PGA for amplifying the output signal from the narrow-band noise remover based on the gain controlled by the first PGA if narrow-band noise exists, and outputting the inherent output signal of the narrow-band noise remover without amplification if narrow-band noise is not detected; an equalizer for compensating for the deteriorated characteristics of the output signal from the second PGA; and a slicer for converting the output signal of the equalizer into a digital signal.