公开(公告)号：US6072676A

公开(公告)日：2000-06-06

申请号：US59145

申请日：1998-04-13

Applicant: Chan Tran ,  Steven Martin ,  A. Paul Brokaw

Inventor： Chan Tran ,  Steven Martin ,  A. Paul Brokaw

IPC: H01L27/02 ,  H03F1/52 ,  H02H3/24 ,  H02H9/00

CPC classification number: H03F1/523 ,  H01L27/0248

Abstract: A protection circuit for an excitation current source protects against excessive compliance voltage by using a cascode transistor between the current source and an output terminal, and a transistor coupled to the output terminal and to the control lead of the cascode transistor to cause the cascode transistor to turn off if the voltage exceeds a threshold level.

Abstract translation: 用于激励电流源的保护电路通过在电流源和输出端之间使用共源共栅晶体管，以及耦合到输出端和共源共栅晶体管的控制引线的晶体管来防止过度的顺应性电压，以使共源共栅晶体管 如果电压超过阈值电平，则关闭。