Substrate charge pump basic cell design

[js0p]

substrate bias charge pump

Hello. I need to design a substrate charge pump to generate a negative substrate bias.

The picture shows a simple substrate pump basic cell proposed in the Baker Li "CMOS Circuit Design, Layout and Simulation".

Can anyone tell me any formulas to design this circuit or where I can find those formulas?

For example, I wonder how can I calculate parameters like capacitor values, diode transistor sizing, oscillator frecuency, etc. for a substrate voltage, current and ripple required.

Thanks in advance.

 

[alicia8283]

cmos substrate pump

hi, i also want to know which parameters would affect by the currrent loading for the charge pump.
thanks!