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Design >> Analog Design >> ramp generator
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Message started by jim on Jul 4^th, 2005, 3:21am

Title: ramp generator
Post by jim on Jul 4^th, 2005, 3:21am

Hello all,

I am trying to design a voltage ramp generator circuit.
can anybody provide the paper and website about it?

Thanks for your help!

Best Regards

jim

Title: Re: ramp generator
Post by qadeer on Jul 12^th, 2005, 8:56am

Hi Jim,

what type of ramp generator you are looking for......I've used a ramp generator circuit earlier to control the slew rate of source follower. If you want I can help you out.

Regards,
Qadeer

Title: Re: ramp generator
Post by jim on Jul 13^th, 2005, 3:00am

Hi Qadeer ,

I use a ramp generator circuit for ADC, could you please
give me the circuit or paper about it?

Thank you very much !

Best Regards,

Jim

Title: Re: ramp generator
Post by qadeer on Jul 13^th, 2005, 10:18pm

Jim,

The simlest way to design a ramp generator is to charge/discharge a fixed cap with contant dc current controlled with the help of switches. The main challenge is such designs to generate a precision current and matching. I would suggest you to look for following two papers.

A robust, load-insensitive pad driver
Dowlatabadi, A.B.;
IEEE Journal of Solid-State Circuits,
Volume 35, Issue 4, April 2000 Page(s):660 - 665

On-chip ramp generators for mixed-signal BIST and ADC self-test
Provost, B.; Sanchez-Sinencio, E.;
IEEE Journal of Solid-State Circuits,
Volume 38, Issue 2, Feb. 2003 Page(s):263 - 273

Hope they would help.
Best of luck.....

Regards,
Qadeer

Title: Re: ramp generator
Post by jim on Jul 14^th, 2005, 12:36am

Hi Qadeer,

Thanks for your reply! It's a pity that I haven't a IEEE account, so I couldn't download paper from it . Could
you please forward the two papers to me?

email address: fujj_2003@163.com

Thank you very much and best regards!
Jim