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Aubrey Kagan

Measuring an RMS value on a PSoC5, Part 1: Signal Acquisition

Aubrey Kagan
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EdwardThirlwall
EdwardThirlwall
2/26/2019 8:36:53 PM
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Different angles
It seems that there are indeed various angles to look at this problem. Sometimes it does take an expert to truly see many more angles that a single problem could be solved from. It won't be long before I bet you would be finding even more possible ways to tackle this single equation.

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UdyRegan
UdyRegan
10/22/2018 12:17:44 AM
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Re: Precision Full Wave Rectifier
David - I can totally get where you are coming from. It's really hard to start going into something new when there is just so many things lining up for your attention isn't it! Thanks Aubrey for this article though. And for the update about your files. I'll definitely be referring back to these couple of articles for a while to come so thanks for including in the links for us

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antedeluvian
antedeluvian
3/15/2017 9:30:59 PM
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Links Update
Unfortunately Dropbox has chnaged their implementation of public files. This has affected many, many instances where I have linked to my files. I am trying to update the links as I come across them. Dropbox will ask you to register in order to copy the file or open the file (you can only open the file once you log in)

In this blog this is the revised link to the project RMS1

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Victor Lorenzo
Victor Lorenzo
5/14/2016 3:56:53 PM
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Thanks!
A nice and good one as always.

If I ever had a time I will give a try to PSoCs and this seems like a good starting point.

Thanks!

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antedeluvian
antedeluvian
5/12/2016 7:00:58 PM
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Re: Precision Full Wave Rectifier
dmunson

The PSoC 1 has several types of configurable continuous time filters

There are some things I miss from the PSoC1.

I remember working with Ganesh (the author of the blog you referred to) on resolving an issue I had with the CRC generator on the PSoC1. I actually acknowledged his contribution in my article "Create Modbus Slave" in the July 2008 issue of Circuit Clellar.

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dmunson917
dmunson917
5/12/2016 6:37:32 PM
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Precision Full Wave Rectifier
You can also create a precision full wave rectifier in a PSoC 1:

www.cypress.com/blog/psoc-hacker-blog/psoc-1-sc-block-applications-precision-full-wave-rectifier.

The PSoC 1 has several types of configurable continuous time filters (constructed from switched capacitor blocks) available.

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antedeluvian
antedeluvian
5/12/2016 3:43:46 PM
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Re: Thanks
David

 always good to see you on these pages.  

Ditto

Nice understandable explanation.  

Thanks. This was the easy bit. I hope you say the same thing after the 2nd part.

And reinforces my resolve that I MUST get into the PSOCs

You know where I am if you need advice.

 

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antedeluvian
antedeluvian
5/12/2016 3:15:26 PM
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Re: Application Note
dmunson

I found this document on the Cypress website:

Thanks. I poked around and I see that it looks like the component will in fact work- it's just that its features (and appearance in setup) have expanded. It certainly is a different and interesting approach, but in my case would still require 3 external components (2 resistors and an AC coupling capacitor) in order to bias the input signal to 1/2 rail.

I gave up too easily, but perhaps the simpler approach is better when you see quite how complicated the Digital Filter Block is, in Part 2.

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dmunson917
dmunson917
5/12/2016 1:11:08 AM
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Application Note
I found this document on the Cypress website:

 

Precision Rectifier Using Mixer – PSoC
®

3/PSoC 5
Project Name: Precision Rectifier
Programming Language: C
Associated Part Families:CY8C38xx/CY55xx
Software: PSoC
®
Creator™
Related Hardware: CY8CKIT-001
Prerequisites: Example Project: Using System Wide Resources
Author: Praveen Sekar

 

June 3, 2010 Document No. 001-61919 Rev. ** 

 

www.cypress.com/file/233271/download

 

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David Ashton
David Ashton
5/11/2016 9:32:11 PM
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Artist
Thanks
Thanks Aubrey, always good to see you on these pages.  Nice understandable explanation.  And reinforces my resolve that I MUST get into the PSOCs (when I have done all the other ten million things hanging over me.... :-)

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