Patent ID: 7973571

Claim:
A multichannel drive circuit comprising: a current source array including a plurality of current sources corresponding respectively to a plurality of channels; and an input switch array including a plurality of input switches corresponding respectively to the plurality of channels, wherein electric power is supplied via the respective input switches of each channel constituting the input switch array to respective loads of each channel constituting a load array by the respective current sources of each channel constituting the current source array, the multichannel drive circuit characterized by including: an interchannel common connection line for making conduction between respective current paths of each channel for connecting the respective current sources of each channel constituting the current source array with the respective input switches of each channel constituting the input switch array; and current blocking means for blocking output current of the current source of that channel of the plurality of channels in which the input switch is in an OFF state from flowing into the interchannel common connection line.