发明授权
- 专利标题: Schmitt trigger circuit
- 专利标题(中): 施密特触发电路
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申请号: US09336997申请日: 1999-06-21
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公开(公告)号: US06335649B1公开(公告)日: 2002-01-01
- 发明人: Koji Maeda
- 申请人: Koji Maeda
- 优先权: JP10-174869 19980622
- 主分类号: H03K3037
- IPC分类号: H03K3037
摘要:
A Schmitt trigger circuit of the present invention comprises a first inverter for setting a positive trigger voltage corresponding to a threshold level when an input signal is changed in a direction from a low voltage level to a high voltage level, a second inverter for setting a negative trigger voltage corresponding to a threshold level when an input signal is changed in a direction from a high voltage level to a low voltage level. The Schmitt trigger circuit of the present invention further comprises a level shift circuit for shifting the input signal voltage level down by a constant voltage and supplying the voltage shifted input signal to the first inverter.
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