发明申请
- 专利标题: Off chip driver
- 专利标题(中): 离线驱动程序
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申请号: US10631394申请日: 2003-07-31
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公开(公告)号: US20050024090A1公开(公告)日: 2005-02-03
- 发明人: Hartmud Terletzki , Gerd Frankowsky , Gunther Lehmann
- 申请人: Hartmud Terletzki , Gerd Frankowsky , Gunther Lehmann
- 申请人地址: US CA San Jose
- 专利权人: Infineon Technologies North America Corp.
- 当前专利权人: Infineon Technologies North America Corp.
- 当前专利权人地址: US CA San Jose
- 主分类号: H03K17/16
- IPC分类号: H03K17/16 ; H03K19/003 ; H03K19/017 ; H03K19/0185 ; H03K19/094
摘要:
A system and method is provided for controlling the impedance and current of an off chip driver circuit to match to load driven by the driver and for reducing noise and ringing in the off chip driver circuit. The driver comprises a pull up transistor for switching the output of the driver to a high-voltage, a pull down transistor for switching the output of the driver to a low voltage, a first current mirror transistor coupled to the pull up transistor for controlling the current transmitted to a load connected to the driver when the output of the driver is at the high-voltage, and a second current mirror transistor coupled to the pull down transistor for controlling the current transmitted to the load when the output of the driver is at the low voltage. In addition, the driver may include a first pre-driver providing a gate signal for the pull up transistor having a controlled slew rate and a second pre-driver providing a gate signal for the pull down transistor having a controlled slew rate.
公开/授权文献
- US06958626B2 Off chip driver 公开/授权日:2005-10-25