发明名称 Compound acoustic actuator drive circuit and portable information terminal
摘要 In a signal generation circuit for a compound acoustic actuator that generates a sound and a vibration in response to a frequency of a signal input to the compound acoustic actuator, the signal generation circuit comprising a plurality of signal data stored in a memory to generate a plurality of signals having mutually different frequencies, the plurality of signals at least including a signal, a frequency of which is equal to a resonant frequency causing the compound acoustic actuator to generate the vibration, a synthesizing means to synthesize a plurality of drive signals in accordance with the plurality of signal data so as to cause the compound acoustic actuator to generate the vibration, and a sweeping means to sweep the plurality of drive signals, repeatedly.
申请公布号 US6617966(B2) 申请公布日期 2003.09.09
申请号 US20010972923 申请日期 2001.10.10
申请人 NEC CORPORATION 发明人 TAKAHASHI CHIEMI
分类号 H04R1/00;B06B1/04;G08B3/10;G08B6/00;H02N2/06;H04M1/00;H04R3/00;(IPC1-7):N01N37/46 主分类号 H04R1/00
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