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What makes OOR special

First of all OOR has unique discrete output stage. It is not class A, it is rather something between class A and AB. OOR doesn’t have full-time operational current source, which forces the current through one transistor, which always deliver current to load. Instead it has special circuitry, which never lets to turn off neither of both output steering transistors, which are polarised similarly as in class AB. It is done in a way, that current of both transistors is monitored by independent circuits and those circuits prevents to drop below some threshold value of current…

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