Unlock instant, AI-driven research and patent intelligence for your innovation.

Input sampling circuit and method for processing optical disc read signal

An input sampling and circuit technology, which is applied in the direction of recording signal processing, information storage, recording information storage, etc., can solve the problem of the power consumption of the circuit chip size and other problems

Active Publication Date: 2005-11-23
REALTEK SEMICON CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combining the above factors, the analog-to-digital converter will have a negative impact on the die size and power consumption of the optical drive system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Input sampling circuit and method for processing optical disc read signal
  • Input sampling circuit and method for processing optical disc read signal
  • Input sampling circuit and method for processing optical disc read signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Please refer to figure 1 , figure 1 It is a schematic diagram of a first embodiment of a part of the input sampling circuit 100 of the present invention. figure 1 The input sampling circuit 100 is used to process an optical disc reading signal DRB read by a head in the optical disc drive system to generate a digital signal D1. The input sampling circuit 100 includes a conversion circuit 110, which includes an automatic gain control unit (auto-gain control unit) 112, a low-pass filter / equalizer (low-pass filtering / equalizing unit) 114, and a low-resolution modulus Converter (low resolution ADC) 116 . Implementations of the automatic gain control unit 112 , the low-pass filter / equalizer 114 , and the analog-to-digital converter 116 in this embodiment are widely known to those skilled in the field of optical disk drive systems, and thus need not be described in detail here.

[0018] see figure 2 , figure 2 It is a flowchart of an input sampling method according to a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a input sampling circuit used to process a disc reading signal which comprises a auto-gain control unit to adjust the fain of disc reading signal, a low-pass filter / balance gear which is connected with auto-gain control unit to do low-pass filter / balance process with disc reading signal to generate a output signal, and a analog-digital converter which is connected with low-pass filter / balance gear to do analog-digital conversion with output signal to produce a digital signal with a smaller dynamic scope.

Description

technical field [0001] The invention provides an optical disc read signal processing circuit and method, in particular to an input sampling circuit and method for processing optical disc read signal. Background technique [0002] In recent years, optical storage technologies such as CD, DVD and other specifications have gradually become the mainstream technology for storage media applications due to their advantages of good portability and large storage capacity. Generally speaking, when an optical disc drive system processes a disc read back signal read by a pickup, it uses an analog-to-digital converter (ADC) to The data read from the optical disc is sampled to generate corresponding digital data values, and then subsequent digital signal processing is performed. [0003] However, when the rotational speed of the optical disk drive is applied to high-speed applications with the development of technology, the sampling frequency of the analog-to-digital converter is also in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G11B20/00
Inventor 颜光裕
Owner REALTEK SEMICON CORP