公开(公告)号：EP0780984A4

公开(公告)日：1998-09-16

申请号：EP96922222

申请日：1996-07-04

申请人： SEIKO EPSON CORP

发明人： KUMAGAI TAKASHI ,  TOKUDA YASUNOBU

IPC分类号： G11C7/10 ,  H03K17/16 ,  H03K19/003 ,  H03K19/0185 ,  H03K19/0948 ,  G11C11/41 ,  G11C11/417

CPC分类号： G11C7/1057 ,  G11C7/1051 ,  H03K17/167 ,  H03K19/00361 ,  H03K19/018521 ,  H03K19/0948

摘要： An output circuit outputs data from an output terminal Dout after the potential at the terminal Dout is set at a prescribed intermediate value between the potential at the power source line and that at the ground line. The output circuit is provided with an output driving means (30) composed of first and second transistors (31 and 32). The first transistor (31) is provided with a first control terminal DP to which a first control signal is inputted and the second transistor (32) is provided with a second control terminal DN to which a second control signal is inputted. The output circuit is also provided with a setting means (22) which turns the transistors (31 and 32) off by controlling the first and second control signals and a short-circuiting means (50) which short-circuits either of the control terminals DP and DN to the output terminal Dout. Before the data are outputted, after the transistors (31 and 32) are turned off by the setting means (22), the potential of the output terminal Dout is set at the intermediate value by short-circuiting the control terminal DP or DN to the output terminal Dout by means of the short-circuiting means (50).

摘要翻译： 输出电路，在将输出端子Dout设定为电源线电位与接地线电位之间的电位之后，输出来自输出端子Dout的数据信号。 输出电路包括由第一和第二晶体管31和32构成的输出驱动装置30.第一晶体管31具有输入第一控制信号的第一控制端子DP。 第二晶体管32具有输入第二控制信号的第二控制端DN。 它还包括设置装置22，其控制第一和第二控制信号以将第一和第二晶体管31和32设置为断开状态。 还包括使第一和第二控制端子DP，DN和输出端子Dout中的一个短路的短路装置50。 此外，在数据信号输出之前，晶体管31和32被设置装置22设置为截止状态，之后根据输出端子Dout的电位进行短路，并且输出端子被设置为 中间电位