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

Question on the DC O/P in 2-stage fully differential opamp

Status
Not open for further replies.
A

arp

Junior Member level 3
Joined
Jan 27, 2005
Messages
31
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Activity points
318
2-stage fully diff opamp

Hi
I m designing a 2 stage fully differential telescopic cascaded amplifier

what will be the dc o/p at the first stage such that i will get max swing at the second stage?
is it required that the o/p of first stage is at the centre of the powersupply voltage??
if not what will be the voltage that required!!!!

thanks in advance
arp
 

Re: 2-stage fully diff opamp

i m also having the same doubt
can anyone plz help us
 

Re: 2-stage fully diff opamp

If I am not mistaken you should have your o/p at the center to gain max swing. Otherwise you will have clipping. In what technology do you design your opamp? Is it an analog design or is it a school project? Maybe I have a ready made on eto show you...
D.
 

    A

    arp

    Points: 2
    Helpful Answer Positive Rating
Re: 2-stage fully diff opamp

Hi

First, I'm a newbe designer but I would help you with the next tips

-There is something called CMFB which regulate the dc output at the second stage
It's escencial for a good design using dual output!!!

-The DC output in the first stage should provide the current to the second stage. After that, the DC output will be adjusted with a offset voltage at the input to provide the middle between the suplies. Take care because is escencial the CMFB in the circuit.
 

    A

    arp

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top