8. For the differential amplifier circuit below, find: (a) IREF, and l (do not n

Question

8. For the differential amplifier circuit below, find: (a) IREF, and l (do not neglect base currents). (b) The common mode range of operation of the amplifier. (c) Adi, Aa2, Ad (Ad is the ratio (v (d) Aama. Arema, Aem where Aem is the common mode gain between the two output terminals, and is the ratio (v /vicm). (e) CMRR (f Suppose a sinusoidal input of 20mv peak amplitude is applied to the base of transistor Q in a complementary or balanced manner. Calculate and plot the output voltage across the 10K load resistor. Plot the sinusoidal signal as a reference. 10V 100 5 KS2 5 KS2 .3 V Voda O Qu Q: VT 25 mV 5000 x 500 4.65 KS2 10V

Explanation / Answer

A) going from path ground to -10V for Q3 thorugh B-E junction

0-IREF * 4.65 kilo-ohms - Vbe = -10V where Vbe= 0.7V

solving u will get IREF = (10-0.7)/4.65 kilo-ohms = 2ma

I= Iref *?/?+2 = 1.96ma

Plz do not rate this answer as a fellow Electrical Engineering student consider it just as a helping hand Thanks :) Happy Chegging

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