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1.发明授权Driver interface for a telephone line switch enabling a speech circuit under any polarity conditions 失效用于电话线开关驱动器接口以接通语音电路独立于电力极性的
公开(公告)号：EP0613275B1
公开(公告)日：2001-05-09
申请号：EP92830693.5
申请日：1992-12-30
Applicant: STMicroelectronics S.r.l.
Inventor： Consiglio, Pietro , Antonini, Carlo , Vanalli, Gianpietro
IPC: H04M1/00
CPC classification number: H04M1/6033 , H04M1/738
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