(Solved): A bipolar transistor buffer circuit is required which will drive a current through light-emitting d ...

A bipolar transistor buffer circuit is required which will drive a current through light-emitting diode. (a) i) Sketch the schematic of a suitable buffer circuit clearly labelling each compoment, the input voltage and the output voltage. ii) Assuming ideal components, sketch the voltage transfer characteristic of the circuit. iii) If the forward current, \\( I_{F} \\), through the diode will not to exceed \\( 40 \\mathrm{~mA} \\) and the forward voltage, \\( V_{F} \\), across the diode will not to exceed \\( 3 \\mathrm{~V} \\), establish a suitable supply voltage.\r\n(b) The circuit is to be driven by a logic circuit with the following static electrical characteristics: Design the circuit using the 3C2BJT1 and 3C2LED1 as the active components (relevant excerpts from the datasheets appended). In particular, clearly identify the values of all additional passive components and the rationale for their selection with reference to the operating conditions of the circuit where appropriate.