Patent ID: 7042117

Claim:
A power supply circuit for actuators of an on-board travel control device, comprising: driving circuits for driving a plurality of actuators of the on-board travel control device, a plurality of control lines for respectively supplying control signals to said driving circuits, a power circuit having a voltage increasing circuit for supplying power from an on-board power source to said control lines, an auxiliary control line connected to one of said plurality of control lines associated with a first actuator of the plurality of actuators, the first actuator being less likely to be influenced than others of the plurality of actuators by activation of the driving circuit associated with a second actuator of the plurality of actuators so that voltage of the on-board power source is configured to be supplied to said auxiliary control line, and a voltage holding circuit connected to and associated with the control line of the second actuator to reduce a voltage drop of the driving circuit associated with the second actuator.