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Design >> Analog Design >> Reducing Voltage Source Noise
https://designers-guide.org/forum/YaBB.pl?num=1109614262

Message started by Roby on Feb 28^th, 2005, 10:11am

Title: Reducing Voltage Source Noise
Post by Roby on Feb 28^th, 2005, 10:11am

I am trying to measure Current response of a tunneling junction by sweeping the voltage from 0 to 0.5V. I measure the noise of v-source alone and found out that it is too high. Can i connect a capacitor across the DUT while taking teh measurement (which is equivalent to a high resistor) to reduce the noise.

Thanks
Roby

Title: Re: Reducing Voltage Source Noise
Post by August West on Feb 28^th, 2005, 12:08pm

You can if ...
1. the bandwidth of the resulting RC filter has appreciable attenuation at the frequency of interest.
2. the currents that flow as a result of inserting the capacitor do not in turn cause their own problems.

-August