PURPOSE:To reduce both the input capacity and the power consumption by applying the cascode connection to an ECL gate circuit. CONSTITUTION:Transistors TRQ5 and Q6 are connected by cascode to the differential amplification part of a double input NOR ECL circuit consisting of TRQ1-Q4 and resistances R1-R3. Thus the increment is reduced for the input capacity of the TRQ2 and Q3 respectively. Therefore the bad effect can be reduced to the response speed and a waveform despite a large output resistance of a circuit at the preceding circuit.
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