Invention Grant
- Patent Title: Closed loop surge protection technique for differential amplifiers
- Patent Title (中): 差分放大器的闭环浪涌保护技术
-
Application No.: US12730486Application Date: 2010-03-24
-
Publication No.: US08067986B2Publication Date: 2011-11-29
- Inventor: Nir Matalon
- Applicant: Nir Matalon
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Fiala & Weaver P.L.L.C.
- Main IPC: H03F1/52
- IPC: H03F1/52

Abstract:
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.
Public/Granted literature
- US20100176849A1 CLOSED LOOP SURGE PROTECTION TECHNIQUE FOR DIFFERENTIAL AMPLIFIERS Public/Granted day:2010-07-15
Information query