T tongkin New Member Aug 30, 2009 #1 Greeting, Can anyone recommend a output stage for transimpedance circuit using MOSFET? Thank you
E Electronworks New Member Aug 30, 2009 #2 what are you looking to do? I would use an op amp with a feedback resistor and take the output voltage that way.
what are you looking to do? I would use an op amp with a feedback resistor and take the output voltage that way.
T tongkin New Member Aug 30, 2009 #3 Actually, it is CMOS MEMS circuit As show in the attachment, I am looking for the output stage for transimpedance in order to lower the output resistance. The output stage that I'm using is look like inverter(for digital circuit). Someone say it does not work, so I am looking for the other one. any suggestion please thank you Attachments untitled.JPG 42.5 KB · Views: 413
Actually, it is CMOS MEMS circuit As show in the attachment, I am looking for the output stage for transimpedance in order to lower the output resistance. The output stage that I'm using is look like inverter(for digital circuit). Someone say it does not work, so I am looking for the other one. any suggestion please thank you
B BrownOut Banned Aug 30, 2009 #4 Seems to me you only need to bias the one you already have. You need to have both devices silghtly on when the input is zero. Otherwise, you'll have a huge deadban in your output.
Seems to me you only need to bias the one you already have. You need to have both devices silghtly on when the input is zero. Otherwise, you'll have a huge deadban in your output.
E Electronworks New Member Aug 30, 2009 #5 a comparator with a push pull output stage should work. Have you looked at one of these...? What current do you need to drive?
a comparator with a push pull output stage should work. Have you looked at one of these...? What current do you need to drive?
T tongkin New Member Aug 30, 2009 #6 the current comes from photo diode around 1uA and, is it possible to have output voltage around 1V (using 0.35 COMS process with L_max = 20um W_min = 0.4um)
the current comes from photo diode around 1uA and, is it possible to have output voltage around 1V (using 0.35 COMS process with L_max = 20um W_min = 0.4um)