Patent ID: 6943786

Claim:
A dual voltage switch with programmable asymmetric transfer rate, comprising: a first input voltage V 1 , a second input voltage V 2 , a first switch connected to conduct a first current I 1 between V 1 and a common output node in response to a first control voltage with which the resistance of said first switch varies, a second switch connected to conduct a second current I 2 between V 2 and said common output node in response to a second control voltage with which the resistance of said second switch varies, a load capacitance C connected to said common output node, and a control circuit arranged to alternately provide said first and second control voltages such that said common output node is pulled up to V 1 at a first transfer rate given by I 1 /C when said first control voltage is provided and said common output node is pulled down to V 2 at a second transfer rate given by −I 2 /C when said second control voltage is provided.