STUPIDSID
1(a)
Draw re model and h model of CE amplifier configuration
4 M
1(b)
Investigate the effect of Ib on the performance of inverting amplifier, if Ib=10nA and all resistances are 100K ohm. What dummy resistance Rp must be installed in series with the non-inverting input to minimize E0?
4 M
1(c)
List features of IC 723 regulator
4 M
1(d)
Explain two static and dynamic parameters of op-amp
4 M
1(e)
Why voltage divider biasing is widely used?
4 M
2(a)
Draw the circuit diagram of 3 op-amp instrumentation amplifier using IC741. Explain its requirements, applications and its disadvantages over difference amplifier.
12 M
2(b)
Derive equations for Zi, Z0 and Av for CE amplifier using voltage divider network (with un-bypassed Re)
8 M
3(a)
Why is an emitter coupled differential amplifier RE resistor is replaced by constant current source. Draw such circuit. Explain how this network acts as a constant current source (I0)
10 M
3(b)
For n-channel FET (un-bypassed Rs) with R1=910k ohm, R2=110k ohm , RD=2.2k ohm , RS= 510 ohm, IDSS=5.8mA , Vp=-3V and VGSS=-2V. Find ID, VGS, VG, VD, VS, and VDS (common source circuit)
10 M
4(a)
Design a mono-stable multi-vibrator to generate a pulse of 1.1ms. Draw circuit diagram with trigger circuits waveforms obtained at pin 3 across capacitor.
10 M
4(b)
Draw and explain working of R-2R ladder network and the following terms:
i. Resolution
ii. Offset voltage
iii. Full scale voltage
i. Resolution
ii. Offset voltage
iii. Full scale voltage
10 M
5(a)
Draw and explain block diagram of IC 723 regulator and also explain need of short circuit protection circuitory
10 M
5(b)
Draw neat functional diagram of PLL IC 555 and explain the following terms along with working of PLL:
i. Free running frequency
ii. Capture range
iii. Lock range
i. Free running frequency
ii. Capture range
iii. Lock range
10 M
6(a)
Explain Op-amp as summer and comparator
10 M
6(b)
Compare ideal and practical integrator circuit
10 M
7(a)
Schmitt trigger circuit
5 M
7(b)
Successive approximation resistor analogue to digital convertor
5 M
7(c)
FET characteristics
5 M
7(d)
Wein bridge Oscillator
5 M
7(e)
Stability factor of biasing circuit.
5 M
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