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receiver circuit

A receiving end and circuit technology, applied in the field of receiving end circuits, can solve problems such as difficulty in realizing terminal impedance matching resistance R, data errors, etc.

Active Publication Date: 2016-10-05
NOVATEK MICROELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, the impedance value of a single terminal impedance matching resistor R will drift with many variables, so it is difficult to achieve a terminal impedance matching resistor R with an impedance value that can be accurately matched, resulting in errors in received data

Method used

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Embodiment Construction

[0035] Please refer to figure 2 , figure 2 It is a schematic diagram of a receiver circuit 20 according to an embodiment of the present invention. Such as figure 2 As shown, the receiver circuit 20 is coupled to a transmitter 22 through channels SCH1 and SCH2 , and includes a variable terminal impedance unit 202 , a receiver 204 and a data judgment control unit 206 . To put it simply, when the receiver circuit 20 intends to receive the differential signal from the transmitter 22 through the channels SCH1 and SCH2, the receiver circuit 20 will first receive the calibration signal CAL from the transmitter 22 for calibration, and then it is coupled to the channel The variable terminal impedance unit 202 of SCH1 and SCH2 first performs impedance matching with the current terminal impedance value corresponding to the channels SCH1 and SCH2, and then the receiver 204 also coupled to the channels SCH1 and SCH2 receives the correction signal CAL, which is generated after signal p...

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PUM

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Abstract

The invention discloses a receiving end circuit, which can increase the accuracy of signal reception. The receiver circuit includes a variable terminal impedance unit coupled to at least one channel for impedance matching with at least one terminal impedance value corresponding to the at least one channel; a receiver coupled to the at least one channel , for receiving a correction signal to generate a digital correction signal; and a data judgment control unit for comparing the digital correction signal with a preset data to adjust the at least one terminal impedance value.

Description

technical field [0001] The present invention relates to a receiver circuit, especially one that can generate a digital correction signal according to a received correction signal, and then compare the digital correction signal with a preset data to adjust the terminal impedance value or the characteristics of the receiver A receiver circuit that performs corrections to increase the accuracy of signal reception. Background technique [0002] Generally speaking, in the interface circuit receiver, the terminal impedance matching resistor is required to maintain the integrity of signal reception, that is, when the terminal impedance matching resistor of the receiver is accurately matched with the transmitter, the accuracy of signal reception can be increased. [0003] Please refer to figure 1 , figure 1 It is a schematic diagram of a known interface circuit receiver 10 . Such as figure 1 As shown, in most applications, when the interface circuit receiver 10 receives differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16
Inventor 吴泽宏
Owner NOVATEK MICROELECTRONICS CORP