| 摘要 |
A switching circuit is disclosed that is operative from a single supply voltage and is capable of switching in response to both positive and negative voltage input signals and exhibits hysteresis within defined positive and negative threshold voltage limits with respect to a datum voltage level. The circuit includes an input transistor having an input electrode connected to the signal input terminal and a transistor - diode current mirror connected to said input electrode whereby the current mirror defines one of the threshold voltage limits.
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