发明授权
US5258667A Logic circuit for controlling a supply on drive pulses to regulate an
output level
失效
用于控制驱动脉冲上的电源以调节输出电平的逻辑电路
- 专利标题： Logic circuit for controlling a supply on drive pulses to regulate an output level
- 专利标题（中）： 用于控制驱动脉冲上的电源以调节输出电平的逻辑电路
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申请号： US832731申请日： 1992-02-07
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公开(公告)号： US5258667A公开(公告)日： 1993-11-02
- 发明人: Toshikazu Ohtake , Hideaki Yamada
- 申请人： Toshikazu Ohtake , Hideaki Yamada
- 申请人地址： JPX Tokyo
- 专利权人： NEC Corporation
- 当前专利权人： NEC Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX3-018055 19910208; JPX3-137334 19910610
- 主分类号： H03K19/013
- IPC分类号： H03K19/013
摘要：
A logic circuit has means for controlling an active pull-down circuit in response to a detected result of an output level detection circuit. This prevents an undershoot of the output. Accordingly, it is possible to prevent malfunctions of a logic circuit in the next stage. It also prevents a prolongation of the transition time at the time of a rise of the output potential. Moreover, it reduces the power consumption of the circuit as a whole by decreasing a wasteful current from the output transistor of the emitter-follower to the active transistor.
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