2007-215331 is referenced by 88 patents.

PROBLEM TO BE SOLVED: To provide a voltage booster circuit in which accurate drive timing of an MOS can be obtained without requiring troublesome adjustment.SOLUTION: The voltage booster circuit 1 connected with a power supply 10 comprises a coil 2, a first MOS 3 for controlling conduction of the coil, a second MOS 4 for controlling conduction from the coil to the motor drive circuit 20 side, and a capacitor 5 for storing charges through conduction of the second MOS. Drive timing of the second MOS in the voltage booster circuit is controlled such that after the potentials Va and Vb on the upstream side and the downstream side of the second MOS are detected by first and second potential detection lines 7 and 8, the downstream side potential is offset by α by means of a potential regulator 11, the offset potential Vx is compared simply with the potential Va by means of a voltage comparator 12, and the second MOS is turned on/off when the Va is larger than the Vx and the potential difference is equal to α.

Title
Voltage booster circuit
Application Number
2006-033253
Publication Number
2007-215331
Application Date
February 10, 2006
Publication Date
August 23, 2007
Inventor
Ishiguro Tetsuya
Assignee
Hitachi
IPC
B62D 05/04
H02M 03/155