Hi John, Thanks a lot for your reply.
I have a proven precision rectifier (it is working in some 200+ UPS)circuit, based on LM324 but uses negative supplies, unfortuately I dont know(at this time) how to attach images with this post.

I will be very greatfull if you please put the schematic in your next post. For attaching image you can upload the image to your 8052.com user space. You can access by clicking My Home Page link on left of this page then select the file on your disk by browsing and then click upload it. Once that's done. you can attach that file with your message. Type a line in following format for attaching image.


I will try to find the book herein mumbai and buy it if it is available.

In a new product, I am now trying a precision rectifier for a current tranformer, from the same book page No.251. this is a single supply based circuit based on an LM358, this appears similar to the Burr Brown application you have shown in a previous post.
I wired a ciruit, scoped it and found to be satifactory.

Can you please post the schematic of the above circuit too.

Thanks & Regards,
Prahlad Purohit