Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

[SOLVED] transimpedance amp. Need helps!

Status
Not open for further replies.
L

louiee

Newbie level 3
Joined
Mar 31, 2010
Messages
4
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,313
Hi guys,

I was given a task to design transimpedance amplifier for infrared receiver IC in 0.18um CMOS. My current input range is 800p to 200uA. I will use single input PIN photodiode as input signal. Do you guys know how to convert single input to differential without disturbing signal integrity? I have used RGC for converting the current to voltage but I have problem to amplify the signal. :D
 

What's a RGC?

You could use a Norton Amplifier (Current-in voltage-out Amp) where you take the input current through the drain/collector of a MOS/BJT and mirror it through two separate branches invert one of the signals and then convert to voltage. Just be careful with the delays your get through the inverting stage, cause if the delay is significant you might end up with high distortion. To alleviate this you could just add a buffering stage in the non-inverting path that matches the delay of the inverting stage.

Hope this helps,

diemilio
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top