I am reading about the Dickson charge pump in the page below and having some problems deriving the formula.
http://www.slideshare.net/EcemBezer...4954-bcdf-85d3169187d5&v=qf1&b=&from_search=1

V1 = (Vin - Vt) + Vφ1 = 2Vin - Vt
Why is it so? Vin = Vφ1?

 

I think that the wikipedia explained it well. The formula above is misleading without any further explanation.
https://en.wikipedia.org/wiki/Voltage_multiplier#Dickson_charge_pump
BTW, how about if Vin = 0V and both clock signals are above 0?
Does the formula apply?