Information about OTRA design

diemilio · Dec 9, 2006

Hi everyone.

Does anyone know where can I get info about OTRA (Operational Transresistance Amplifier) design???? How to do the sizing, placement, diferent techniques, etc???

Thanks in advance,

diemilio

Guest · Dec 9, 2006

Re: OTRA design

In fact, OTA is the same Op Amp when you want to use its transconductance charateristic (output current/ input voltage), but since normal opamps have small input range that the G spec. is linear;
thus you should increase input range for more linearity by various techniques e.g. gain boosting (or use further simple opamps at input).
you can refer to John & Martin's book (chap. 15), where Gm-C filters need constant Gms and then tuning is introduced.

diemilio · Dec 9, 2006

Re: OTRA design

zabihian said:
In fact, OTA is the same Op Amp when you want to use its transconductance charateristic (output current/ input voltage), but since normal opamps have small input range that the G spec. is linear;
thus you should increase input range for more linearity by various techniques e.g. gain boosting (or use further simple opamps at input).
you can refer to John & Martin's book (chap. 15), where Gm-C filters need constant Gms and then tuning is introduced.

thanks for your reply, but actually I'm looking for info about transresistance opamps, not transconductance.

DenisMark · Dec 11, 2006

Re: OTRA design

I think that reference can be good start point for you.
Regards.

diemilio · Dec 12, 2006

Re: OTRA design

Thanks DenisMark but I alredy have this papper. I looking for something that has a little more of theory related to OTRAs. Do you know of any books that cover this topic??

thanks,

diemilio

horzonbluz · Dec 12, 2006

Re: OTRA design

In my opinion, i think the book written by P E.Allen is very good.
It's enough for we to study the OP AMP.

jonashat · Dec 13, 2006

OTRA design

Did you try using TIA's (trans-impedance amplifiers) as a search word?

diemilio · Dec 13, 2006

Re: OTRA design

jonashat said:
Did you try using TIA's (trans-impedance amplifiers) as a search word?

No, but I'll try... thanx

diemilio

stimulator · Dec 16, 2006

OTRA design

I also need it.Thank you.

Information about OTRA design

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