Patent ID: 7633335

Claim:
A current source circuit, comprising: a voltage output section which outputs a voltage signal; a current source section having a plurality of current source blocks, each current source block comprising a plurality of current sources, each current source being arranged and configured to supply a respective output current and to output said output current from a respective current source block; and a conversion section which is connected between said voltage output section and said current source section and outputs a reference current to each of said plurality of current sources based on the voltage signal, such that the output current from each of said plurality of current sources is set based on the reference current and said output current is maintained based on sensing an amount of current output from said current source section, wherein: within each current source block setting of the output current is carried out in time series over said plurality of current sources, said current source section comprises first and second current source blocks, said first current source block alternately carries out a current setting operation to set a value of the output currents and a current outputting operation to output the output currents, and said second current source block carries out a current setting operation when said first current source block carries out its current outputting operation and carries out a current outputting operation when said first current source block carries out its current setting operation.