发明授权
- 专利标题: Filterless class-D speaker driver with less switching
- 专利标题(中): 无滤波D类扬声器驱动器,切换少
-
申请号: US11797037申请日: 2007-04-30
-
公开(公告)号: US07609110B2公开(公告)日: 2009-10-27
- 发明人: Minsheng Wang
- 申请人: Minsheng Wang
- 申请人地址: US CA Irvine
- 专利权人: Broadcom Corporation
- 当前专利权人: Broadcom Corporation
- 当前专利权人地址: US CA Irvine
- 代理机构: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- 主分类号: H03F3/38
- IPC分类号: H03F3/38
摘要:
Methods for designing a filterless class-D amplifier and driver are described herein. In the exemplary embodiment, a feedback loop is used to stabilize the filterless class-D amplifier. A pulse width modulated (PWM) output signal is generated by adding a comparator input signal to a comparative signal, and comparing the sum to a peak voltage, which can be a peak value of the comparative signal. A limit of one PWM sample will be generated half per period of the comparative signal, resulting in lower dynamic switching noise and a decreased sensitivity to jitter noise than conventional filterless class-D amplifiers.
公开/授权文献
- US20080265989A1 Filterless class-D speaker driver with less switching 公开/授权日:2008-10-30
信息查询
IPC分类: