摘要 |
An ECL circuit includes a plurality of input terminals, a current source, a reference transistor having an emitter connected to the current source, a base receiving a reference voltage and a collector connected to a first resistor, a plurality of input transistors each having an emitter connected to the current source, a collector connected to a second resistor and a base connected to one of the input terminals, a plurality of pull-down resistors each connected between the base and the emitter of one of the input transistors, an emitter follower transistor having a base connected to the collector of the reference transistor or a common connection point of collectors of the input transistors and an emitter connected to an output terminal and a third resistor.
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