发明授权
- 专利标题： Closed loop surge protection technique for differential amplifiers
- 专利标题（中）： 差分放大器的闭环浪涌保护技术
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申请号： US12117987申请日： 2008-05-09
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公开(公告)号： US07714655B2公开(公告)日： 2010-05-11
- 发明人: Nir Matalon
- 申请人： Nir Matalon
- 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： Fiala & Weaver P.L.L.C.
- 主分类号： H03F3/45
- IPC分类号： H03F3/45
摘要：
A differential amplifier with surge protection is described. The differential amplifier includes a first output driver device, a second output driver device, a first replica device, a second replica device, a current comparator, and a clamp circuit. The first replica device is configured to be a replica of the first output driver device. The second replica device is configured to be a replica of the second output driver device. The current comparator is configured to generate a threshold current, and to compare the threshold current to a first current through the first replica device and a second current through the second replica device. The clamp circuit is configured to limit a third current through the first output driver device and a fourth current through the second output driver device if the current comparator determines that the threshold current is greater than the first current or the second current.
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