Hello everyone
I want to ask about something in the unity gain sampler
the images are from Razavi's book "Design of Analog CMOS"

He says through the chapter 13  of switched capacitor circuit that node x is floating and hence its charge must be conserved, however when he explained the settling in the hold me he allowed the voltage of node x to change very abruptly so that the KVL holds, however does not that violate the conservation of charge at that node? Notice that : Vout starts at 0 voltage, and the voltage across CH is Vo due to sampling phase also Vx was 0 voltage before that jump.