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Driving circuit of CMOS silicon LED

A technology of light-emitting diodes and driving circuits, which is used in electrical components, electronic switches, pulse technology, etc.

Inactive Publication Date: 2009-12-23
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, energy loss and electromagnetic interference on electrical interconnection lines have become bottlenecks restricting the development of silicon-based microelectronic integrated circuits

Method used

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  • Driving circuit of CMOS silicon LED
  • Driving circuit of CMOS silicon LED
  • Driving circuit of CMOS silicon LED

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Embodiment

[0030] The present invention is a kind of CMOS silicon light-emitting diode drive circuit, and the specific structure sees figure 1 , figure 2 , image 3 with Figure 4 shown. The driving circuit mainly includes four modules including an input impedance matching circuit 10 , a differential signal amplifying circuit 11 , a source follower circuit 12 , and an output circuit 13 . The input impedance matching circuit 10 provides an input impedance of 50 ohms, which is convenient for impedance matching between different modules; the differential signal amplifying circuit 11 amplifies the input small signal; the source follower circuit 12 plays the role of isolating the signal and reducing the level; the output Circuit 13 is composed of a folded cascode module 131, an inverter 132 and an output PMOS transistor 133, which realizes differential input to single-ended output and can provide sufficient voltage and current drive for CMOS silicon light-emitting diodes.

[0031] The CM...

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Abstract

A CMOS silicon light-emitting diode driving circuit is characterized in that it includes: an input impedance matching circuit; a differential signal amplifying circuit, the differential signal amplifying circuit receives the signal of the input impedance matching circuit, and the differential signal amplifying circuit performs input small signal Amplification; a source follower circuit, the source follower circuit receives the signal of the differential signal amplifier circuit, and the source follower circuit plays the role of isolating the signal and reducing the level; an output circuit, the output circuit is connected with the source follower circuit , realize differential input to single-end output, and can provide sufficient voltage and current drive for light emitting diodes.

Description

technical field [0001] The invention relates to a light-emitting diode driving circuit, in particular to a CMOS silicon light-emitting diode driving circuit. Background technique [0002] With the rapid reduction of feature size in standard integrated circuit processes, the density and cost of devices have been greatly improved. However, energy loss and electromagnetic interference on electrical interconnection lines have become bottlenecks restricting the development of silicon-based microelectronic integrated circuits. Based on its obvious advantages in transmission bandwidth, anti-interference ability and energy consumption, optical interconnection is expected to become an effective way to solve this problem. Silicon material is the main material of microelectronic integrated circuit technology, and plays an extremely important role in VLSI. Using silicon as the basic material and using mature standard integrated circuit technology to manufacture optoelectronic devices ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/72
Inventor 陈弘达刘海军黄北举
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI