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Linear equalizer

A linear equalizer and buffer technology, applied in baseband systems, shaping networks in transmitters/receivers, digital transmission systems, etc., can solve problems such as limiting filter orders and reducing circuit speed

Active Publication Date: 2016-03-30
REALTEK SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for continuous-time finite impulse response filters, the overall circuit speed decreases as the order of the filter increases
This limits the order of filters that can be practically implemented

Method used

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  • Linear equalizer
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Embodiment Construction

[0050] The present invention relates to a linear equalizer. The following detailed description discloses various practicable embodiments of the present invention, but it should be understood that the present invention can be implemented in various ways, and is not limited to the specific examples described below or specific methods for implementing any features of these examples. In other instances, details known to the public are not shown or described in order to avoid obscuring technical characteristics of the present invention.

[0051] In this article, when differential signals are used, a signal is a voltage including a first terminal signal indicated by a symbol "+" and a second terminal signal indicated by a symbol "-", and this signal is defined as the first terminal The voltage of the signal minus the voltage of the signal at the second terminal. For example, an input signal V I Including a first terminal signal V I+ and a second terminal signal V I－ , and the in...

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Abstract

A linear equalizer comprises a first switch sampling an input signal into a first sampled signal at a first phase of a clock; a first buffer receiving the first sampled signal and outputting a held signal; a second switch sampling the held signal into a second sampled signal at a second phase of the clock; a second buffer receiving the second sampled signal and outputting an output signal; and a capacitor providing a capacitive coupling between the held signal and the output signal. The capacitor is configured to define a transfer function of the linear equalizer.

Description

technical field [0001] The present invention relates to a linear equalizer, in particular to a discrete-time (DISCRETE-TIME) linear equalizer. Background technique [0002] A linear equalizer receives an input signal and outputs an output signal. Wherein, the first frequency component of the input signal is suppressed, and the second frequency component of the input signal is enhanced. Typically, lower frequency components are suppressed and higher frequency components are boosted. This effectively corrects the frequency dispersion that often exists in the input signal in practical applications. A linear equalizer can be implemented using a finite impulse response (finite impulse response; FIR) filter. In US Patent Publication No. 8255449, it discloses a continuous-time finite impulse response filter as a linear equalizer. However, for continuous-time finite impulse response filters, the overall circuit speed decreases as the order of the filter increases. This limits t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03
CPCH04L25/03878H04L25/0272H04L25/03019H04L25/03885
Inventor 林嘉亮
Owner REALTEK SEMICON CORP