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Voltage mode driver with current booster (VMDCB)

A technology of voltage mode and current source, applied in the circuit field, can solve problems such as excessive stress on transistors

Active Publication Date: 2013-09-11
TAIWAN SEMICON MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] When raising the supply voltage to obtain higher V DIFFPP When the output swings, there are device reliability issues due to excessive stress on the transistor

Method used

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  • Voltage mode driver with current booster (VMDCB)
  • Voltage mode driver with current booster (VMDCB)
  • Voltage mode driver with current booster (VMDCB)

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Embodiment Construction

[0035] One aspect of the present invention includes a voltage mode driver with a current source for increasing the output swing. The impedance matching with the output receiver can be achieved by using a high-impedance current source.

[0036] On the other hand, the control of the voltage-mode driver and the current source are synchronized, thereby ignoring any skew formed.

[0037] Due to the reduction of the headroom in the advanced semiconductor process, the embodiment overcomes the lower output voltage swing and overcomes the lower output swing. This results in lower power consumption and smaller die size area.

[0038] In the embodiment of the present invention, the output voltage swing is independent of the power supply voltage to a certain extent, but can be adjusted by the current ratio of parallel current sources.

[0039] The embodiment is compatible with any semiconductor process and lower power supply voltage. Embodiments with proper impedance matching can produce good o...

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PUM

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Abstract

A voltage mode driver with a current booster (VMDCB). The voltage mode driver circuit able to achieve a larger voltage output swing than its supply voltage. The voltage mode driver circuit is supplemented by a current source or "current booster." The circuit includes a first inverter, a second inverter, and a current source. The first inverter receives a first input and output a signal at anode. The second inverter receives another input outputs at the same output node. The current source is serially coupled to the output node via a first switch, the first switch receiving an input at the first input.

Description

Technical field [0001] Generally speaking, the invention relates to circuits. Specifically, the present invention relates to a voltage mode driver (VMDCB) with a current booster capable of achieving a larger voltage output swing than its power supply voltage. Background technique [0002] The output swing of the traditional voltage mode drive (VMD) structure is limited by the power supply of the circuit. For example, a circuit with a 1 volt (1V) power supply can generate a differential peak-to-peak (1V) of 1 volt DIFFPP ) Swing. [0003] However, as the device size in the semiconductor manufacturing process becomes smaller and smaller, the power supply voltage generally also drops. Therefore, when the power supply voltage is less than 1V, it is difficult to achieve 1V DIFFPP . [0004] Several methods are used in the prior art to solve this problem. [0005] One way is to increase the power supply voltage. However, increasing the power supply voltage to overdrive the device often ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCH03K19/017509H03K19/0941H02M7/48H03K19/0175H03K19/094
Inventor 陈威志
Owner TAIWAN SEMICON MFG CO LTD