发明授权
- 专利标题: Speaker excursion control system
- 专利标题(中): 扬声器游览控制系统
-
申请号: US325042申请日: 1994-10-18
-
公开(公告)号: US5548650A公开(公告)日: 1996-08-20
- 发明人: David L. Clark
- 申请人: David L. Clark
- 申请人地址: MI Holland
- 专利权人: Prince Corporation
- 当前专利权人: Prince Corporation
- 当前专利权人地址: MI Holland
- 主分类号: H03G11/00
- IPC分类号: H03G11/00 ; H04R3/00
摘要:
A speaker excursion control circuit for driving relatively small diameter speakers at their maximum output while assuring minimum distortion of acoustical output from such transducers detects signals which may cause over excursion and dynamically controls the amplitude of signals applied to the power amplifier coupled to the speakers. In one embodiment of the invention a single state-variable filter is employed with a voltage controlled amplifier controlled by a low pass output of the state-variable filter to provide the speaker signal control. In another embodiment, a pair of state-variable filters are employed with the first of such filters defining a model for the speaker cone excursion and providing control output signals to a second state-variable filter which dynamically shifts its filtering characteristics causing increased signal attenuation when the control signals indicate that speaker over excursion may occur.
公开/授权文献
- US4901755A Valve housing for cartridge type faucets 公开/授权日:1990-02-20
信息查询