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Current supplier and method thereof

A supply method and technology of a supplier, applied in the direction of instruments, electric variables, control/regulation systems, etc., can solve the problems of increasing the production cost of the current supplier 100, increasing the output pins of the current supplier 100, etc., and achieving the reduction of output pins The effect of bit and production cost

Active Publication Date: 2013-06-12
ALICORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method not only needs to increase the output pins of the current supplier 100, but also increases the production cost of the current supplier 100.

Method used

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  • Current supplier and method thereof
  • Current supplier and method thereof

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Embodiment Construction

[0064] figure 2 Shown is a schematic diagram of a current supplier according to an embodiment of the present invention. In practical application, the current supplier 200 provides differential current to the external circuit (for example: USB device) through the differential output port formed by the output terminals PN21 and PN22, and Rt21 and Rt22 are used to represent the external circuit Equivalent resistance (also known as external equivalent resistance). In addition, the current provider 200 includes a current generator 210 , a current recorder 220 and a differential buffer 230 . Wherein, the current generator 210 is electrically connected to an output terminal PN21 of the differential output ports. Therefore, in terms of electrical connection, the current generator 210 can be electrically connected to the external equivalent resistor Rt22 through the output terminal PN21 .

[0065] In operation, the current provider 200 has a first mode and a second mode. Wherein, in...

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Abstract

The invention discloses a current supplier and a method thereof. The current supplier provides a differential current through a differential output terminal and comprises a current generator, a current recorder and a differential buffer. The current generator generates a reference current with reference to a first reference voltage and an external equivalent resistor according to a first mode signal and stops generating the reference current according to a second model signal. The current recorder copies the reference current according to the first mode signal and records current information according to a copy result. The current recorder generates a bias current by means of the current information according to the second mode signal. The differential buffer receives the bias current and generates a differential current to the differential output terminal according to a differential input signal.

Description

technical field [0001] The present invention relates to a current supplier and its method, and in particular to a current supplier capable of recording current information and its method. Background technique [0002] Due to the trend of high-speed transmission in recent years, the application of high-speed differential input / output interface (differential input / output interface) has become a trend. For example, Universal Serial Bus (USB) and Serial Advanced Technology Attachment (SATA), etc., have been widely used in various electronic products. [0003] figure 1 A schematic diagram of a conventional high-speed differential I / O interface current supplier is shown. Please refer to figure 1 , the current provider 100 includes P-type transistors MP11 - MP14 , an N-type transistor MN11 and an operational amplifier 110 . The current provider 100 supplies differential current to the external circuit through the differential output port formed by the output terminals PN11 and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
Inventor 张祐维程议贤高秉佑郑景中刘益良
Owner ALICORP
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