Optikon
New Member
I am trying to come up with a setup to measure circuit noise with equipment on hand.
I wish to measure noise in a bandwidth of 1 MHz.
I expect the noise to be from about 1uV to 100uV peak.
I expect the noise to be white.
Has anyone done this with a high bandwidth scope successfully?
Obviously there needs to be a low noise amplifier and filter in the setup.
So I have considered the methods used in an appilcation note from linear tech (AN70). The two problems that bother me about the method are:
1) It calls out using some ancient equipment that I stand no chance of ever finding and even if I did, it's not worth my while to buy or otherwise get.
2) It describes building several complicated circuits and shielding boxes for use with the equipment and for noise isolation. This I can understand but MAN!! is it involved... got to be an easier way..
Anyone made these kind of measurments before with a setup that can take less than two days to build?? Looking for alternative methods to AN70..
Thanks!
I wish to measure noise in a bandwidth of 1 MHz.
I expect the noise to be from about 1uV to 100uV peak.
I expect the noise to be white.
Has anyone done this with a high bandwidth scope successfully?
Obviously there needs to be a low noise amplifier and filter in the setup.
So I have considered the methods used in an appilcation note from linear tech (AN70). The two problems that bother me about the method are:
1) It calls out using some ancient equipment that I stand no chance of ever finding and even if I did, it's not worth my while to buy or otherwise get.
2) It describes building several complicated circuits and shielding boxes for use with the equipment and for noise isolation. This I can understand but MAN!! is it involved... got to be an easier way..
Anyone made these kind of measurments before with a setup that can take less than two days to build?? Looking for alternative methods to AN70..
Thanks!