发明授权
- 专利标题: Trimming circuit for clock source
- 专利标题(中): 时钟源微调电路
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申请号: US13607734申请日: 2012-09-09
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公开(公告)号: US08723612B2公开(公告)日: 2014-05-13
- 发明人: Xiuqiang Xu , Jie Jin , Yizhong Zhang
- 申请人: Xiuqiang Xu , Jie Jin , Yizhong Zhang
- 申请人地址: US TX Austin
- 专利权人: Freescale Semiconductor, Inc.
- 当前专利权人: Freescale Semiconductor, Inc.
- 当前专利权人地址: US TX Austin
- 代理商 Charles Bergere
- 优先权: CN201210182560 20120425
- 主分类号: H03K3/0231
- IPC分类号: H03K3/0231 ; H03K4/502
摘要:
A semiconductor trimming circuit includes parallel coupled PMOS devices coupled in parallel with parallel coupled NMOS devices and an additional pair of dummy NMOS devices. The dummy NMOS devices are coupled in parallel with the NMOS devices. A trimming circuit for an internal clock source may be formed with an array of such switches for selecting one or more trimming capacitors of the trimming circuit. Such an array has a low leakage current and permits good trimming linearity.
公开/授权文献
- US20130285729A1 TRIMMING CIRCUIT FOR CLOCK SOURCE 公开/授权日:2013-10-31
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