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[求助] Please upload "Redesigning the old 555 [timer circuit]" , Thank you.

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发表于 2018-9-19 08:47:36 | 显示全部楼层 |阅读模式

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Please upload "Redesigning the old 555 [timer circuit]" to me, Thank you.

Redesigning the old 555 [timer circuit]
Published in: IEEE Spectrum ( Volume: 34, Issue: 9, Sept. 1997 )
Page(s): 80 - 85
Date of Publication: Sept. 1997
ISSN Information:
INSPEC Accession Number: 5700735
DOI: 10.1109/6.619384
Publisher: IEEE



Abstract:
It is rare that an integrated circuit stays on the market for 25 years. And it is surprising that, except for a CMOS derivative, the 555 timer has never been updated. It has been shrunk somewhat, but the original schematic and layout have remained intact. For a long time this situation could be explained by the versatility of the 555, whose speed, current draw and voltage range sit right in the middle of a vast field of applications. But in the last few years, supply voltages have moved downward, well below the 4.5 V at which the 555 cuts off, and the unit's 5-10 mA current requirement now seems wasteful. A better design is clearly needed. The author describes the features of the original timer before discussing the redesign. The voltage versus current design and output stage are discussed.
 楼主| 发表于 2018-9-21 19:16:34 | 显示全部楼层
Help me, please
发表于 2018-9-23 18:13:58 | 显示全部楼层
回复 1# hi_china59

camenzind1997.pdf (2.16 MB, 下载次数: 30 )
 楼主| 发表于 2018-9-25 09:03:24 | 显示全部楼层
回复 3# populbb

Thank you very much.
发表于 2018-10-4 08:27:16 | 显示全部楼层
thank you
发表于 2019-2-19 12:23:20 | 显示全部楼层
回复 3# populbb


    谢谢谢谢写
发表于 2019-3-14 10:04:58 | 显示全部楼层
thanks
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