Can anyone recommend the output stage for transimpedance circuit using MOSFET - Electronic Circuits Projects Diagrams Free

tongkin · 30th August 2009, 10:11 AM

Greeting,

Can anyone recommend a output stage for transimpedance circuit using MOSFET?

Thank you

Electronworks · 30th August 2009, 04:36 PM

what are you looking to do? I would use an op amp with a feedback resistor and take the output voltage that way.

tongkin · 30th August 2009, 04:47 PM

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

BrownOut · 30th August 2009, 04:56 PM

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.

Electronworks · 30th August 2009, 05:10 PM

a comparator with a push pull output stage should work. Have you looked at one of these...? What current do you need to drive?

tongkin · 31st August 2009, 06:09 AM

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)

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30th August 2009, 10:11 AM	#1
tongkin	Can anyone recommend the output stage for transimpedance circuit using MOSFET Greeting, Can anyone recommend a output stage for transimpedance circuit using MOSFET? Thank you

30th August 2009, 04:36 PM	#2
Electronworks	what are you looking to do? I would use an op amp with a feedback resistor and take the output voltage that way. __________________ Bill Naylor www.electronworks.co.uk Electronic Kits for Education and Fun

30th August 2009, 04:47 PM	#3
tongkin	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 Attached Thumbnails

30th August 2009, 04:56 PM	#4
BrownOut	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. __________________ You don't need a quadraphonic Blaupunkt -- you need a curve ball.

30th August 2009, 05:10 PM	#5
Electronworks	a comparator with a push pull output stage should work. Have you looked at one of these...? What current do you need to drive? __________________ Bill Naylor www.electronworks.co.uk Electronic Kits for Education and Fun

31st August 2009, 06:09 AM	#6
tongkin	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)