Title:
PWM OUTPUT CONTROLLING CIRCUIT
Document Type and Number:
Japanese Patent JP3302907
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize an output controlling circuit, which can increase an output accuracy and simultaneously and individually control a plurality of outputs, and which has a simple circuit configuration, thereby minimizing the factors which cause current consumption and noise.
SOLUTION: This circuit is provided with a counter 10 which can always operate by itself. In response to a counted value of the counter 10, the cycle and duty of a PWM output signal based on a cycle set value and a duty set value are simultaneously controlled, thereby controlling the cycle and duty once in one cycle of the counter 10. By this method, an output accuracy can be increased and the PWM output signals are individually and simultaneously controlled. Since the PWM output signals are outputted, with the cycle and duty being independently controlled, a circuit configuration can be simplified and the factors which causes current consumption and noise can be suppressed.
Inventors:
Takaaki Suezawa
Application Number:
JP20196397A
Publication Date:
July 15, 2002
Filing Date:
July 28, 1997
Export Citation:
Assignee:
NC Microsystem Co., Ltd.
International Classes:
H02M7/48; H02P27/08; H03K7/08; (IPC1-7): H02M7/48; H03K7/08
Domestic Patent References:
| JP851779A | ||||
| JP8111985A |
Attorney, Agent or Firm:
Nobuo Takahashi (3 outside)
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