Voltage to current converter

A voltage to current converter comprising:

• a charge transfer device that accumulates charge corresponding to an input voltage and transfers the accumulated charge;
• a smoother that accumulates the transferred charge and smooths an output voltage;
• and
• a current generator that generates a current corresponding to the input voltage by use of a current corresponding to the charge accumulated in the smoother;
• wherein the charge transfer devise comprises:
• a first switch and a second switch that are connected in series between an input terminal of the input voltage and an input node of the current generator;
• and
• a first capacitor, at least one end of which is connected between the first switch and the second switch, that accumulates or discharges charge corresponding to the input voltage;
• a third switch that switches whether or not charge corresponding to a first reference voltage based on temperature characteristics of the current generator is accumulated in the first capacitor;
• and
• a fourth switch that switches whether or not charge corresponding to a second reference voltage based on the temperature characteristics of the current generator is accumulated in the first capacitor
• wherein the current generator comprises:
• a second capacitor that accumulates or discharges charge corresponding to a current caused by discharge of the first capacitor;
• and
• a current mirror circuit that comprises a first current path passing a first current corresponding to the accumulated charge in the second capacitor and a second current path passing a second current in proportion to the first current.