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Electronics and Communication Signal Processing Difficulty: Medium

Consider the common-collector amplifier in the figure (bias circuitry ensures that the transistor operates in forward active region, but has been omitted for simplicity). Let I C be the collector current, V BE be the base-emitter voltage and V T be the thermal voltage. Also, g m and r o are the small-signal trans-conductance and output resistance of the transistor, respectively. Which one of the following conditions ensures a nearly constant small signal voltage gain for a wide range of values of R E ? Which one of the following relations is not correct? What is MIN? The detailed information regarding the mechanism of fracture is available from microscopic examination, normally using scanning electron microscopy, and its study is termed as Consider the sequence x[n] = a n u[n] + b n u[n], where u[n] denotes the unit-step sequence and 0 < |a| < |b| < 1. The region of convergence (ROC) of the z-transform of x[n] is