Question

2. In the circuit below. Assume the two transistors are identical with Ics 100fA, and Find the operating points (Ic. VcE) of the transistors. Hint: You may initially ignore the base currents, and verify the error. a. b. Redo part a if lcs 10fA. c. Argue whether the circuit offers a stable biasing strategy. RB Rc Q1

Answer 1

Too trang"gtors aroldenttal uftnhsat-loofA -15 二 100 a) ind the openattng pelnts (ie, Ve of the tnansisea Vc 2. -15 15-10010 i"X 14-4x10 ニ -19 3 15-14-4 시0-10

fov to be oN, VE = 15.-0-1= 14.3 Volts Cーど

СЕ 14.3 v

lf 10.993 mA 2 15 4.3 Hence ventfred the enmot

for the taansiotor q to be oN) -16 16 -0 vo ts 15 Volts

b). These will mot be much defference 1cs lofa c) Since Vi and VBa us. The be much defference if o t hanstgfors wll be ON always alwauS