Title:
MODULATION WAVE GENERATING CIRCUIT FOR PULSE WIDTH MODULATION INVERTER DEVICE
Document Type and Number:
Japanese Patent JPS5992776
Kind Code:
A
Abstract:
PURPOSE:To reduce the cost of a pulse width modulation inverter device by storing the fundamental waveform data of a modulation wave in a memory cell, reading out data from the memory cell, latching it, thereby obtaining each phase modulation waveform data with one memory cell. CONSTITUTION:A microcomputer 4 inputs a command signal of a modulation wave frequency and outputs various control signals such as an address signal and the like. An ROM 5 outputs a modulation fundamental waveform data by an address signal. This data is applied to latch circuits 6-8. The latch circuits 6- 8 receives a latch command signal corresponding from a computer 4, latches the value of the data signal at that time, receives an output timing signal from the computer 4, and outputs a latch data. This outputting operation is repeated by gradually proceeding the value of the address signal, thereby outputting each phase modulation waveform data.
Inventors:
KATSUTOU MASAYUKI
SUGISHIMA EIICHI
SUGISHIMA EIICHI
Application Number:
JP20152982A
Publication Date:
May 29, 1984
Filing Date:
November 17, 1982
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H02M7/48; (IPC1-7): H02P13/20
Domestic Patent References:
| JPS5783906A | 1982-05-26 | |||
| JP56137511B |
Attorney, Agent or Firm:
Masuo Oiwa