Title:
MOTOR DRIVE DRIVING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2006/129706
Kind Code:
A1
Abstract:
[PROBLEMS] To provide a motor driving circuit and a motor driving system wherein the circuit occupation area is small and the IC size can be reduced. [MEANS FOR SOLVING PROBLEMS] A polarity inversion data generating circuit is provided to use the higher-order bits of an address counter, which do not contribute to the access to a memory, as they are, as polarity inversion instruction data (flag bit). Then, two cyclic memory accesses are performed in the same direction to read a half period of waveform data twice. A polarity inversion instruction is issued for one of the waveform data as read twice. A calculation of the polarity inversion is performed in accordance with the polarity inversion instruction, whereby waveform data corresponding to one period of sinusoidal wave can be simply generated.
Inventors:
SHIMADA MAKOTO (JP)
Application Number:
PCT/JP2006/310871
Publication Date:
December 07, 2006
Filing Date:
May 31, 2006
Export Citation:
Assignee:
ROHM CO LTD (JP)
SHIMADA MAKOTO (JP)
SHIMADA MAKOTO (JP)
International Classes:
H02P8/18
Foreign References:
| JPH03265499A | 1991-11-26 | |||
| JP2000184798A | 2000-06-30 | |||
| JPH1169886A | 1999-03-09 |
Attorney, Agent or Firm:
Kajiyama, Tsuyoshi (Nishi-Shinjuku Shinjuku-ku Tokyo, 23, JP)
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