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RTL consists of a common emitter stage with a _______ connected between the base and the input voltage source.(a) collector(b) base resistor(c) capacitor(d) inductorI got this question in an interview.My doubt is from Register-Transistor Logic(RTL) in section Logic Families of Digital Circuits

Answer» CORRECT answer is (b) base resistor

Best explanation: RTL consist of a common EMITTER stage with a base resistor connected between the base and the INPUT VOLTAGE SOURCE. The role of base resistor is to expand the negligible transistor input voltage range (about 0.7 V) to the logical “1” level (about 3.5 V) by converting the input voltage into a current. Thus, base resistor plays a major role in biasing of the transistor.


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