示波器的英文资料

要说做虚拟仪器,世界上最好最先进的应该是NI的.
你可以去NI的官方网站上找找,那里会有一些示波器的原理,我手里有一些NI公司培训时候发过来的资料,如果你需要的话留下邮箱,我发给你一些.

http://www2.tek.com/cmswpt/tifinder.lotr?cn=oscilloscopes&sc=2&so=desc&pn=1&rp=10&lc=ZH

Some Very Basic Oscillator Theory:

Oscillators are a natural and expected part of the electronic scene. They occur in many, many applications and make possible circuits and subsystems that perform very useful functions. Oscillators occur sometimes even when we don't want them -- amplifiers can oscillate if stray feedback paths are present. Without oscillators we would probably live in a very dull world!

Oscillation occurs when an amplifier is furnished with a feedback path that satisfies two conditions:

1. Amplitude Condition -- The cascaded gain and loss through the amplifier / feedback network must be