Title:
デューティー比制限機能付きパルス発生回路及びDC/DCコンバータ
Document Type and Number:
Japanese Patent JP3581002
Kind Code:
B2
Abstract:
In a pulse generator, a sawtooth-shaped wave generator circuit generates a sawtooth-shaped wave by charging and discharging a capacitor. The sawtooth-shaped wave is fed to a comparator that performs pulse-width modulation on it in accordance with the voltage it receives via a terminal and thereby produces pulses. The comparator has its output grounded through a transistor that is turned on with appropriate timing by the sawtooth-shaped wave generator circuit. Thus, the maximum duty factor of the output pulses is made equal to the duty factor of the sawtooth-shaped wave.
Inventors:
Rinsho Yama
Application Number:
JP1048698A
Publication Date:
October 27, 2004
Filing Date:
January 22, 1998
Export Citation:
Assignee:
ROHM Co., Ltd.
International Classes:
H02M3/155; H02M3/156; H02M3/145; H03K3/017; H03K3/0231; H03K4/06; H03K4/50; H03K7/08; H03K4/502; (IPC1-7): H03K7/08
Domestic Patent References:
| JP5211766A | ||||
| JP5211766A |
Attorney, Agent or Firm:
Shizuo Sano