nakagome charge pump doubt

[learning_curve]

Hello,

I was looking at the nakagome charge pump circuit...please refer attached pic


I am unable to understand how the final value of phi+VDD and phibar+VDD gets established..
need some help tracing the voltages ..

 

[BradtheRad]

I like to explore unfamiliar circuits using the animated simulator at www.falstad.com.

Charge pumps are always interesting. So I tried your Nakagome.

Here is a screenshot with scope traces:



It needed loads attached, to maintain charge pump action on the capacitors.

The supply, clock and inverter are all 5V.

As you can see, the outputs alternate between 5 and 10V.

This software has the capability of exporting an entire layout as a weblink. In case you would like to run the same simulation...

Just click the link below to open the website, load my schematic automatically, and run it on your computer.

Click Allow when it asks for permission to open the Java applet.

https://tinyurl.com/9ypgc9t

 

[learning_curve]

thank you Bradtherad,

It makes sense the outputs switch between 5 and 10 V depending on if CLK is 0V or 5V. I will simulate it.
I was trying to see what happens before the outputs reach the final values of 5 and 10V.
As in how the circuit starts and builds up to those final voltages...