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Current mode receiver

A technology of a receiving device and a current mode, which is applied in the directions of logic circuits, electrical components, adjusting electrical variables, etc., can solve the problems of poor duty cycle ratio of the current mode receiving device 100, incomplete matching of current mirrors, etc.

Inactive Publication Date: 2010-01-06
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the incomplete matching among the current mirrors 110, 120 and 130, the output currents I2 and I3 are not necessarily equal to the input current Ii and the reference current Ir
In this way, the duty ratio of the current mode receiving device 100 may be poor.

Method used

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Examples

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Embodiment Construction

[0018] figure 2 A circuit diagram of a current mode receiving device 200 according to an embodiment of the present invention is shown. Please refer to figure 2 . The current mode receiving device 200 is used for referring to a reference current Ir, and outputting a high or low output voltage Vo according to an input current Ii corresponding to a load 240 . The current mode receiver 200 includes current mirrors 210 , 220 and 230 and means for pulling up or pulling down the output voltage Vo.

[0019] The current mirror 210 is used to replicate the input current Ii to output an output current I1. The current mirror 220 is used to replicate the output current I1 to output an output current I2. The current mirror 230 is used to replicate the reference current Ir to output an output current I3.

[0020] In the embodiment of the present invention, the output voltage Vo is generated at the node 250 connected to the output terminals of the current mirrors 220 and 230 , and the ...

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PUM

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Abstract

A current mode receiver is provided. The current mode receiver includes a first current mirror duplicating an input current to output a first output current, a second current mirror duplicating the first output current to output a second output current, a third current mirror duplicating a reference current to output a third output current, and means for pulling high or low an output voltage based on the second output current and the third output current. The first through third current mirrors are respectively inputted and outputting through gain boost circuits to increase the input and output impedance thereof.

Description

technical field [0001] The present invention relates to a current mode receiving device, and more particularly to a current mode receiving device using a current mirror with high input and output impedances. Background technique [0002] figure 1 is a circuit diagram of a conventional current mode receiving device 100 . The conventional current mode receiver 100 includes current mirrors 110 , 120 and 130 . The current mirror 110 receives an input current Ii corresponding to the load 140 and copies it to output an output current I1. The current mirror 120 receives the output current I1 and copies it to output an output current I2. The current mirror 130 receives the reference current Ir and copies it to output an output current I3. The output terminals of the current mirrors 120 and 130 are coupled to the node 150 . When the output current I2 is greater than the output current I3, the output voltage Vo at the node 150 is pulled down. When the output current I2 is smalle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F3/26
CPCH04L25/0292H04L25/0294H03K19/00384H03K5/2472
Inventor 黄志豪
Owner HIMAX TECH LTD