Patent ID: 8248111

Claim:
A voltage current converter for converting an inputted voltage into a current and outputting said current, comprising: a plurality of sampling and holding units configured to sample and to hold the inputted voltage; a plurality of individual voltage current converting units configured to output currents, which correspond to the voltage sampled and held by said sampling and holding units, wherein each of the individual current converting units corresponds to one of the sampling and holding units; and a control unit configured to control a timing, based on which of the sampling and holding units currently is sampling and holding the inputted voltage, wherein when parts of the currents outputted from said individual voltage current converting units are added and said added currents are outputted, frequency characteristic of a gain of conversion, from said inputted voltage into the added and outputted currents, indicates finite impulse response filter characteristic, and when all of the currents outputted from said individual voltage current converting units are added and said added currents are outputted, the frequency characteristic of the gain of conversion, from said inputted voltage into the added and outputted currents, indicates infinite impulse response filter characteristic.