| 摘要 |
PURPOSE: To provide a conversion circuit capable of applying voltage, reducing output swing, narrowing a transition area and supplying a complementary or differential output by means of 1st and 2nd gate transistor(TR) elements of a differential amplifier which is integral with 1st and 2nd branch circuits of a current mirror. CONSTITUTION: The differential amplifier gates constituted of 1st and 2nd gate TR elements Q2, Q3 act cooperatively with the current mirror circuit in a conversion circuit. On a TTL input terminal, a node A is raised to 2VBE or 2ϕTTL input threshold voltage level together with transition to a TTL logic input signal high potential level. The element Q3 is turned off, and a 3rd current component 1ϕ/R6 flowing through the element Q3 is turned off. A mechanism, based on a cooperative action between the current mirror circuit and the differential amplifier gate circuit gives a complementary ECL output by alternately switching the elements Q2, Q3.
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