Ttl output stage

Details Ttl output stage Ttl output stage

H - Electricity

03

K

328/127

H03K 19/018 (2006.01)

Patent

CA 1242002

TTL OUTPUT STAGE Patrick Y. C. Yin ABSTRACT A novel output stage is provided for producing a TTL output signal in response to the differential output signals from an ECL switch. The output stage includes a translator portion to shift the levels of complementary signals produced by the ECL switch to the appropriate levels for use in driving a TTL output stage, a phase splitter circuit which is driven by the level shifted complementary output signals from the ECL stage and a single output lead. The currents through the level shifting transistors and resistors are controlled by a single current reference generator. The output signals from the translator circuit have voltage levels substan- tially independent of variations in the power supply voltage.

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