发明授权
- 专利标题： Sense amplifier operable under variable power supply voltage
- 专利标题（中）： 感应放大器在可变电源电压下可操作
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申请号： US542225申请日： 1990-06-22
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公开(公告)号： US5138201A公开(公告)日： 1992-08-11
- 发明人: Shigeki Ohbayashi , Atsushi Ohba
- 申请人： Shigeki Ohbayashi , Atsushi Ohba
- 申请人地址： JPX Tokyo
- 专利权人： Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人： Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX2-136554 19900525
- 主分类号： G11C11/419
- IPC分类号： G11C11/419 ; G11C7/06 ; G11C11/416
摘要：
Disclosed is a sense amplifier employing an emitter coupled logic (ECL) circuit. A constant voltage generating circuit independent of a change or a fluctuation of a power supply voltage level is provided. Two current-mirror circuits supply constant currents to the ECL circuit based on a generated constant voltage. Since a constant current independent of the change of power supply voltage level is supplied to the ECL circuit, the ECL circuit reliably converts a small potential difference generated between I/O lines into a current signal. Accordingly, no erroneous reading operation is performed.
公开/授权文献
- US4564922A Postage meter with power-failure resistant memory 公开/授权日：1986-01-14
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