Consider the current steering circuit. The values of Iref, I2 and I6 are mentioned on the circuit . Let B= o. Let 14.28% of I6 is contributed by Q3 28.57% of Ig is contributed by Q4 57.14% of Is is contributed by Qs Find out the ratio , relationship of scaling current of Q2, Q3. Q4 .Q5 W.r.t scaling current of Q1. Iref =1.5mA I=4.5mA I6=10.5mA VcC VCC Iref=1.5mA R1 12= 4.5mA 1 kQ Q2 Q3 Q4 Q5 Q1 I3 15 16-10.SmA

V₁ www R3 V Ru RS www Here - V₁ = 5.8V, V2=5.2V, V3 = 6.70, V4 = 5.10 V5 = 7.7V R₁ = 19 KR, R₂ = 79KR, R3 = 49KR R72 KR, R = 46 KR what is the voltage Vn at inverting terminal of the pamp. 15

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In the circuit , the voltage across the 4 ohm resistor in volts is ___ The circuit is equivalent to a 12V source in series with how many ohms ofresistance? In the circuit, the current through the 6 ohm resistor in amps is ___

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Your friend who works for Photons 'R Us wants help with a circuit to drive the new LED his company has developed. He wants to turn on the LED based on a digital signal which swings between VDD and OV. Unfortunately the LED when it is on drops a voltage VD across of it and requires a current of IL to flow through it to produce light. You ask your 10A Professor for help and he shows you two circuits shown in figure 5, of course in his usual absent-minded self does not tell you how each one works, he only cryptically says one inverts and the other does not. V₁ V DD R₁ (a) Configuration A Vo VDD Figure 5: LED Driver RL (b) Configuration B (a) Based on your 10A knowledge which circuit will turn the LED on when the digital signal is logic 1 ? Explain your answer clearly

cuicuit designed in winknown isubuenit, va resistance R = 2.8K2 and two identical silicon BITS T1 and 12 with 72 and T2 with forward gains BF = 200. The supply voltage Vcc =-25 volts Vcc=25 volts Sub-circuit JICA T2 IB₁1 IB12 VIR R = 28K2 VIC, 2 GIND IB, 1 and Ic, s designate the base and collector current of T2 vespectively where as the courrents IB,₁2 and IG2 designate the base and the collector currents of T2 respectively. T2 and 12 operate in forward active mode Assume that IB, 1 and IB₁2 are equal · VBE, on = 0.8 molt (Threshold woltage) (a) What is the value of the current IR through vesistance R.? (MA) (b) what is the value of the base vaurrent IB, 1? (MA) (c) what is the value of the collector Ic₁₁? (MA) (d) The evicuit idesigned using Resistance Rand Transistors T₁ and To performs an electronic function to connect to sub circut which function is it?