Method and apparatus for providing a representation of an input voltage at a disabled voltage multiplier's output

摘要

A voltage multiplier includes input and output differential multiplying stages, first and second operational amplifiers, and first and second linear devices. An input voltage is received by an inverting input of the first operational amplifier via the first linear device. An output of the voltage multiplier is provided at an output of the second operational amplifier. When the voltage multiplier is disabled, the second linear device provides the input voltage a linear path to an inverting input of the second operational amplifier and, when the voltage multiplier is operational, the second linear device has negligible effect on the voltage multiplier.