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1. 发明授权

EP0657863B1 A signal amplifier circuit and an image display device adopting the signal amplifier circuit 失效
标题翻译：信号放大电路和图像显示装置使用的信号放大器电路
公开(公告)号：EP0657863B1
公开(公告)日：2003-07-16
申请号：EP94302380.4
申请日：1994-04-05
申请人： SHARP KABUSHIKI KAISHA
发明人： Kubota, Yasushi , Katoh, Ken-ichi , Yoneda, Hiroshi
IPC分类号： H03K5/24 , H03F3/00
CPC分类号： G09G3/2011 , G09G3/3688 , G09G2310/027 , G09G2310/0291 , G11C19/00 , H03F1/303 , H03G1/00 , H04N5/148 , H04N5/16 , H04N5/68 , H04N5/70

2. 发明公开

EP0657863A2 A signal amplifier circuit and an image display device adopting the signal amplifier circuit 失效
标题翻译： Signalverstärkerschaltungund Bildanzeigevorrichtung die einenSignalverstärkerschaltungverwendet。
公开(公告)号：EP0657863A2
公开(公告)日：1995-06-14
申请号：EP94302380.4
申请日：1994-04-05
申请人： SHARP KABUSHIKI KAISHA
发明人： Kubota, Yasushi , Katoh, Ken-ichi , Yoneda, Hiroshi
IPC分类号： G09G3/36
CPC分类号： G09G3/2011 , G09G3/3688 , G09G2310/027 , G09G2310/0291 , G11C19/00 , H03F1/303 , H03G1/00 , H04N5/148 , H04N5/16 , H04N5/68 , H04N5/70
摘要： A signal amplifier circuit is provided with a buffer amplifier (1) and an adjusting circuit (2) for detecting a difference in voltage between a reference voltage (V o ) and an output voltage (V o + ΔV) of the buffer amplifier when the reference voltage (V o ) is inputted to the buffer amplifier (1) as an offset voltage, and for inputting a voltage obtained by subtracting the offset voltage (ΔV) from the voltage of an input signal so as to cancel out the offset voltage. An image display device of the present invention includes the above signal amplifier circuit. According to the above arrangement, the offset voltage (ΔV) can be cancelled out. Therefore, the signal amplifier circuit having a desirable buffer characteristic that a voltage having the same level as the voltage of the input signal can be outputted even if the offset voltage is generated in the buffer amplifier. By adopting the above signal amplifier circuit, an image display device which permits a high quality image display can be achieved.
摘要翻译：信号放大器电路设置有缓冲放大器（1）和调整电路（2），用于检测当基准电压（Vo）与缓冲放大器的输出电压（Vo + DELTA V）之间的电压差时，电压（Vo）作为偏移电压被输入到缓冲放大器（1），并且用于输入通过从输入信号的电压中减去偏移电压（DELTA V）而获得的电压，以抵消偏移电压。本发明的图像显示装置包括上述信号放大电路。根据上述结构，可以消除偏移电压（DELTA V）。因此，即使在缓冲放大器中产生偏移电压，信号放大器电路也可以输出具有与输入信号的电压相同电平的电压的期望的缓冲特性。通过采用上述信号放大器电路，可以实现允许高质量图像显示的图像显示装置。

3. 发明公开

EP0657863A3 A signal amplifier circuit and an image display device adopting the signal amplifier circuit 失效
标题翻译：信号放大电路和图像显示装置，其使用信号放大器电路。
公开(公告)号：EP0657863A3
公开(公告)日：1997-05-21
申请号：EP94302380.4
申请日：1994-04-05
申请人： SHARP KABUSHIKI KAISHA
发明人： Kubota, Yasushi , Katoh, Ken-ichi , Yoneda, Hiroshi
IPC分类号： G09G3/36
CPC分类号： G09G3/2011 , G09G3/3688 , G09G2310/027 , G09G2310/0291 , G11C19/00 , H03F1/303 , H03G1/00 , H04N5/148 , H04N5/16 , H04N5/68 , H04N5/70
摘要： A signal amplifier circuit is provided with a buffer amplifier (1) and an adjusting circuit (2) for detecting a difference in voltage between a reference voltage (V o ) and an output voltage (V o + ΔV) of the buffer amplifier when the reference voltage (V o ) is inputted to the buffer amplifier (1) as an offset voltage, and for inputting a voltage obtained by subtracting the offset voltage (ΔV) from the voltage of an input signal so as to cancel out the offset voltage. An image display device of the present invention includes the above signal amplifier circuit. According to the above arrangement, the offset voltage (ΔV) can be cancelled out. Therefore, the signal amplifier circuit having a desirable buffer characteristic that a voltage having the same level as the voltage of the input signal can be outputted even if the offset voltage is generated in the buffer amplifier. By adopting the above signal amplifier circuit, an image display device which permits a high quality image display can be achieved.

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