data-acquisition.us
Forum dedicated to Data Acquisition and Signal Conditioning
 
Home  •  Forum  •  Books  •  Data Acquisition products
 
Input and Source Impedance and MUX Charge Injection Effects

 
Post new topic   Reply to topic    data-acquisition.us Forum Index -> Signal Processing and Conditioning
Author Message
daqmaster
Site Admin


Joined: 27 Jun 2005
Posts: 385
PostPosted: Thu Sep 11, 2008 8:11 pm    Post subject: Input and Source Impedance and MUX Charge Injection Effects Reply with quote
Input and Source
The sensor’s source impedance R should be relatively small to increase the voltage divider drop across R the amplifier’s input. This can substantially improve the signal-to-noise ratio for mV-range sensor signals.


MUX Charge Injection Effects
Analog-switching devices can produce spikes in the MUX output during level transitions in the drive signal. This is called charge-injection effect and can be minimized with low source impedance.


Topic: Signal Conditioning Fundamentals
Back to top
Display posts from previous:   
Post new topic   Reply to topic    data-acquisition.us Forum Index -> Signal Processing and Conditioning All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group