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Design >> Analog Design >> understanding noise measurment
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Message started by yaniv on Aug 16^th, 2006, 9:25am

Title: understanding noise measurment
Post by yaniv on Aug 16^th, 2006, 9:25am

I made a project of controling current by conecting current supply to the drain of transistor, and control the current by changing the Gate voltage.
I measured the noise at the output of the current supply and at the output of my circuit.
the spectrum measurment show adding 10dB noise by my circuit.
how can I explain that additive noise?

Title: Re: understanding noise measurment
Post by loose-electron on Aug 17^th, 2006, 11:11am

You may want to post a picture or more fully describe what you are doing.
It is a little unclear.

However, I believe you are seeing an amplification of the noise through a common source amplifier (ergo the current source)

hope that helps,
Jerry