http://www.edtn.com/search 

http://www.hitex.com/chipdir/chipdir.htm 

http://www.questlink.com. 

http://www.info-quick.com/ 

http://www.questlink.com/ 

http://www.semi.com.tw/ - Search engine with over 45000 DF datasheets 

http://www.semidex.com/ - 60,000 memory IC*'s and boards and growing 

http://www.chipfinder.com 

http://www.ednmag.com 

Lots of Microprocessor Simulators 

http://www.lauterbach.com/download.html 

Company providing Free VHDL COde for Microprocessors 

http://www.teleport.com/~scd/ 

IEEE Microprocessor Refrence ( good ) 

http://www.computer.org/micro/ 

Data Book Library 

http://www.idt.com/products/ 

Electronics Related 

http://www.epanorama.net 

Graduate University 

http://www.grad.sunysb.edu/applying/applying.htm 

Computer Arch intrested group 

http://www.acm.org/sigarch/sigarch_fact_sheet.html 

8085 microprocessorsimulator 

http://www.geocities.com/ResearchTriangle/2608/input.html 

VLSI Student contest 

http://www.eecs.umich.edu/VLSI/ 

Computer Aids for VLSI Design 

http://www.rulabinsky.com/cavd/ AMD 

Digital Simulator 

http://web.mit.edu/ara/www/ds.html 

FPGA related best site 

http://www.optimagic.com/lowcost.shtml 

Xilinx Web Site 

http://www.xilinx.com/products/xaw/coolvhdlq.htm 

roducts/xaw/coolvhdlq.htm 

主要EDA公司：

www.cadence.com

www.synopsys.com

www.avanticorp.com

www.mentorg.com

其他站点：

www.eetimes.com

www.elecdesign.com

www.mrc.uidaho.edu/vlsi/

www.eda.org

www.ovi.org

www.vhdl.org

http://www.estec.esa.nl/wsmwww/leon/leon.html （已经停止更新）

国站有个特点，他们大都很“无私”，会把电路图纸和设计原理什么的都告诉你，这样对你的进一步学习和理解是 很大帮助的！只是一点，就是网站多是英文网，或是日文网，大家要在平时下些功夫了，过了语言关，你会收获颇丰的！ 

     我也在学习，祝我们大家一起进步！为明天之腾飞！加油！ 

http://elm-chan.org/

http://instruct1.cit.cornell.edu/courses/ee476/FinalProjects/

http://www.microtronix.com/company_info/

http://rapidlibrary.com/     以下两个是Datasheet(芯片资料)查询

http://www.alldatasheet.com/

http://www.ti.com/ 

http://www.4qdtec.com/index.html

http://6mt.com/2304tech.htm

http://www.ee.washington.edu/circuit_archive/circuits/

http://www.uslink.net/~cybercir/

http://www.electronic-circuits-diagrams.com/

http://www.epanorama.net/index.php?index=circuit 

http://www.solorb.com/elect/

http://www.tinaja.com/picup01.html

http://www.hwb.acc.umu.se/circuit/index.html

http://jap.hu/electronic/

http://www.microsyl.com/

http://www.pjrc.com/tech/8051/ide/index.html 

http://www.devrs.com/pic/

http://www.rentron.com/

http://www.rlocman.ru/en/

http://users.otenet.gr/~athsam/#Active

http://www.schematicsforfree.com/

http://www4.tpgi.com.au/users/talking/ 

http://www.wa4dsy.net/

http://www.jakehome.com.tw/ckt.html

http://www.hwb.acc.umu.se/

http://www.boerde.de/~matthias/m8051/

http://www.programmersheaven.com/zone5/cat27/ 

 http://dzw.myrice.com/ 

 http://www.4qdtec.com/index.html 

http://6mt.com/2304tech.htm 

http://www.ee.washington.edu/circuit_archive/circuits/ 

http://www.uslink.net/~cybercir/ 

http://www.psyber.com/~dibsed/dcircats.html 

 http://www.eedesign.com.tw/html/default.asp 

http://www.commlinx.com.au/schematics.htm 

http://www.electronic-circuits-diagrams.com/ 

http://www.udl.es/usuaris/p40324/electronica/esquemas.htm 

http://tulungagung1.tripod.com/elektro.htm 

http://www.epanorama.net/index.php?index=circuit 

http://www.solorb.com/elect/ 

http://www.designnotes.com/Circuits.htm 

http://www.tinaja.com/picup01.html 

 http://www.hwb.acc.umu.se/circuit/index.html 

http://jap.hu/electronic/ 

http://electronics123.com/amazon/catalogue/c6-5.htm 

http://www.microsyl.com/ 

http://www.pjrc.com/tech/8051/ide/index.html 

http://www.devrs.com/pic/ 

http://www.rentron.com/ 

http://www.rlocman.ru/en/ 

http://users.otenet.gr/~athsam/#Active 

http://www.schematicsforfree.com/ 

http://www4.tpgi.com.au/users/talking/ 

http://www.wa4dsy.net/ 

http://www.jakehome.com.tw/ckt.html 

http://www.hwb.acc.umu.se/ 

http://jade.hit.edu.tw/網路教室/單晶片範例特區.htm 

http://www.boerde.de/~matthias/m8051/ 

http://www.specs.de/users/danni/