Four-channel-comparator

  
When operated as an open loop without compensation, the HA-2400 becomes a comparator with four selectable input channels. The clamping network at the compensation pin limits the output voltage to allow DTLor TTL digital circuits to be driven with a fanout of up to ten loads. The circuit can be used to compare several signals against each other or against fixed references; or a single signal can be compared against several references.
Four-channel-comparator - schematic

A window comparator, which assures that a signal is within a voltage range, can be formed by monitoring the output polarity, while rapidly switching between two channels with different reference inputs and the same signal input.




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