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Receiver circuit and method for processing received signals

A technology for receivers and circuits, applied in the field of receiver circuits and processing received signals, which can solve problems such as life drift, hard disk drive degradation, and performance degradation

Active Publication Date: 2018-12-07
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, variations due to input known as 1 / f noise, lifetime drift due to aging, and variations due to temperature and / or voltage all contribute to performance degradation
The programmatic requirements in the hard drive are not able to accommodate these changes
[0003] Some of the above problems are exacerbated by the design of hard disk drives moving towards complementary metal-oxide-semiconductor (CMOS) technology
In CMOS technology, 1 / f noise is more pronounced, which leads to more obvious degradation of hard drives
This degradation may cause system failure or loss of hard drive

Method used

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  • Receiver circuit and method for processing received signals
  • Receiver circuit and method for processing received signals
  • Receiver circuit and method for processing received signals

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Embodiment Construction

[0008] The invention discloses a receiver circuit and a method for processing received signals. A receiver circuit, sometimes referred to simply as a receiver, has a differential input and a differential output. The receiver may be used as a receiver circuit for a hard disk drive, where the differential input is connected or coupled to a magnetic head of the hard disk drive. The receiver described in this invention includes two combined feedback loops that simultaneously track the programmed input bias voltage level and correct the output, called the offset voltage. Thus, time-dependent variations due to hard drive mechanisms are tracked and corrected within the loop bandwidth of the receiver.

[0009] figure 1 A schematic diagram of an embodiment of a receiver 100 is shown. Receiver 100 has a differential input 102 and a differential output 104 . The differential input 102 has a first input 106 and a second input 108 . Likewise, the differential output 104 has a first ou...

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Abstract

The invention discloses a receiver circuit (100) and a method for processing received signals. An embodiment of a receiver circuit (100) includes a differential input (102) having a first input (106) and a second input (108) and a first output (110) and a second output (112) The differential output terminal (104). A first feedback loop (120) is connected to the input (102) and output (104), wherein the first feedback loop (120) centers the differential output voltage on the common-mode output voltage so that the common-mode output The voltage-centered differential sum is zero. The circuit (100) also includes a second feedback loop (122), wherein the second feedback loop (122) centers the voltage at the first input (106) and the second input (108) about a reference voltage .

Description

technical field [0001] The present application relates to receiver circuits and methods of processing received signals. Background technique [0002] The head of the hard disk drive outputs a differential voltage to the receiver. As the data rate of hard drives increases, conventional receivers encounter some problems. For example, receivers use manual programming to account for different options and requirements, such as input bias voltage, gain level, and offset correction. The characteristics of hard drives change over time, but the programming requirements are baked into the hard drive. The result is reduced hard drive performance over time. For example, variations due to input known as 1 / f noise, lifetime drift due to aging, and differences due to temperature and / or voltage all contribute to performance degradation. Programmatic requirements in hard drives cannot accommodate these changes. [0003] Some of the problems described above are exacerbated by the design ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/0175
CPCG11B5/09G11B5/022
Inventor M·D·罗雷R·慕克侯帕德海
Owner TEXAS INSTR INC