EC > GATE 2026 > BJT Amplifiers
A small signal source, Vi(t) = A cos(105t) + B sin(107t) is applied to a BJT circuit as shown in the Figure.
Assume zero source resistance, VBE = 0.7 V, βdc = 99, Early voltage = 100 V and Thermal voltage = 25 mV. Effect of internal parasitic capacitances of the BJT may be neglected.
Which expression is the best approximation of the output voltage Vo(t)?
Assume zero source resistance, VBE = 0.7 V, βdc = 99, Early voltage = 100 V and Thermal voltage = 25 mV. Effect of internal parasitic capacitances of the BJT may be neglected.
Which expression is the best approximation of the output voltage Vo(t)?
Correct :
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