A common-emitter stage has

PHYSICS · Subjective · Fermi University Physics · Electronics, Instrumentation & Communication · Semiconductor devices and analogue circuits · Semiconductor devices and analogue circuits

Inside the Instrument, Ch Multistage amplifiers, the Miller effect and output stages

Problem

A common-emitter stage has Cπ=8 pFC_\pi = 8\,\mathrm{pF}, Cμ=3 pFC_\mu = 3\,\mathrm{pF} and a mid-band voltage gain of magnitude A=80A = 80. It is driven from a source of resistance Rs=15 kΩR_s = 15\,\mathrm{k\Omega}. Find the Miller-multiplied input capacitance and the input pole frequency.

Browse the problem library