When the state of switches used in the GI is changed, certain
quantity of charge will be injected into the inverting input via
the capacitor, CC, by the compensation network. This is opposite
to the charge injected by switches. Since it is known that the
amount of charge injected is equal to the product of the voltage
excursion amplitude on the component and its capacitance, generating
a product equal but opposite to each other can make a perfect
compensation between the capacitor CC and switches in the GI. CC
was chosen to be 10 pF. Thus by changing the amplitude of the
voltage excursion on CC, the error of the output voltage caused
by charge injection was reduced to less than 2 mV.