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An open collector output processes an IC's output through the base of an internal bipolar junction transistor (BJT), whose collector is exposed as the external output pin. For NPN open collector outputs, the emitter of the NPN transistor is internally connected to ground, [1] so the NPN open collector internally forms either a short-circuit ...
Top: NPN base width for low collector–base reverse bias; Bottom: narrower NPN base width for large collector–base reverse bias. Hashed regions are depleted regions. As the collector–base voltage (=) varies, the collector–base depletion region varies in size. An increase in the collector–base voltage, for example, causes a greater ...
The common collector amplifier's low output impedance allows a source with a large output impedance to drive a small load impedance without changing its voltage. Thus this circuit finds applications as a voltage buffer. In other words, the circuit has current gain (which depends largely on the h FE of the transistor) instead of voltage gain. A ...
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The Type 575 Transistor-Curve Tracer displays the dynamic characteristic curves of both NPN and PNP transistors on the screen of a 5-inch cathode-ray tube. Several different transistor characteristic curves may be displayed, including the collector family in the common-base and common emitter configuration. In addition to the transistor ...
Sziklai pair that acts like a single NPN transistor with collector C, emitter E, and base B. In electronics , the Sziklai pair , also known as a complementary feedback pair , is a configuration of two bipolar transistors , similar to a Darlington pair . [ 1 ]
Darlington Transistor (NPN-type) In electronics, a Darlington configuration (commonly called as a Darlington pair) is a circuit consisting of two bipolar transistors with the emitter of one transistor connected to the base of the other, such that the current amplified by the first transistor is amplified further by the second one. [1]
The IBM 1401 (announced in 1959 [4]) used DTL circuits similar to the circuit shown in the first picture. [5] IBM called the logic "complemented transistor diode logic" (CTDL). [6] CTDL avoided the level shifting stage (R3 and R4) by alternating NPN and PNP based gates operating on different power supply voltages.