THIRD SEMESTER ELECTRONICS - II BASIC ELECTRICAL & ELECTRONICS LAB DEPARTMENT OF ELECTRICAL ENGINEERING Prepared By: Checked By: Approved By: Engr. Saqib Riaz Engr. M.Nasim Khan Dr.Noman Jafri Lecturer (Lab) Senior Lab Engineer Dean Electrical Department ELECTRONICS-II 1
Name: Registration No: Semester: Batch: ELECTRONICS-II 2
PRACTICAL LIST S.NO. PRACTICAL NAME 01 Verification of the calculated value of a BJT amplifier 02 Implementation of OR gate using BJT s 03 Determination of Input-offset voltage of LM-741 04 Implementation of the Buffer/Non-Inverting Amplifier using LM-741 05 Implementation of the Inverting Amplifier using LM-741 06 Implementation of the Summing Amplifier using LM-741 07 Frequency Response of Active Low Pass Filter 08 Frequency Response of Active High Pass Filter 09 Plot the Drain Characteristics of a JFET 10 Plot the Transfer Characteristics of a JFET 11 JFET Self Biased Network 12 JFET Voltage Divider Bias Network 13 Implementation of Common Source Amplifier using JFET 14 Implementation of Common Drain Amplifier using JFET 15 A-stable Operation of a 555 Timer 16 Mono-stable Operation of a 555 Timer ELECTRONICS-II 3
Pre Lab # 01 BJT Amplifier Q # 01: What are the bias conditions of the base-emitter and base-collector junctions for a transistor to operate as an amplifier? Q # 02: What is amplification? Q # 03: How is voltage gain defined? Name two factors that determine the voltage gain of an amplifier? ELECTRONICS-II 4
Q # 04: Why we prefer CE amplifier rather than CB or CC amplifier? Q # 05: What is the voltage gain of a transistor amplifier that has an output of 5 V rms and an input of 250 mv rms? ELECTRONICS-II 5
Pre Lab # 02 Implementation of OR gate using BJT s Q # 01: When a transistor is used as a switch, in what two states is it operated? Q # 02: Make a truth table of OR as well as AND gate? Input A Input B Output Input A Input B Output OR gate AND gate Q # 03: Draw a circuit of AND gate using BJT? ELECTRONICS-II 6
Pre Lab # 03 Input offset voltage using op-amp Q # 01: Discuss op-amp compensation? Q # 02: Describe the effect of input offset voltage? Q # 03: What are two sources of dc output error voltages? ELECTRONICS-II 7
Pre Lab # 04 Buffer amplifier / Non-Inverting amplifier using LM 741 Q # 01: What is the voltage gain of buffer amplifier? Q # 02: Discuss briefly the operation of non-inverting amplifier? Q # 03: Explain closed loop voltage gain? Q # 03: What is the attenuation of non-inverting amplifier? ELECTRONICS-II 8
Pre Lab # 05 Inverting amplifier using LM 741 Q # 01: Explain briefly the operation of inverting amplifier? Q # 02: What are the impedances of an inverting amplifier? Q # 03: What is the gain of inverting amplifier? ELECTRONICS-II 9
Pre Lab # 06 Summing inverting amplifier using LM 741 Q # 01: Define summing point? Q # 02: What is the value of Rf/R for a five-input averaging amplifier? Q # 03: Describe the operation of a unity-gain summing amplifier? ELECTRONICS-II 10
Pre Lab # 07 Active low pass filter using LM 741 Q # 01: Describe the operation of low pass filter? Q # 02: What is the bandwidth of filter? Q # 03: What determines the response characteristic of a filter? Q # 05: Name the basic parts of an active filter? ELECTRONICS-II 11
Pre Lab # 08 Active high pass filter using LM 741 Q # 01: How does a high-pass Sallen-Key filter differ from the low-pass configuration? Q # 02: To increase the critical frequency of a high-pass filter, would you increase or decrease the resistor values? Q # 03: Write down the formulas of critical frequency & phase shift? ELECTRONICS-II 12
Pre Lab # 09 Drain characteristics of JFET Q # 01: Does an n-channel JFET require a positive or negative value for VGs? Q # 02: How is the drain current controlled in a JFET? Q # 03: What is the difference between Pinch off voltage & Cut off voltage? ELECTRONICS-II 13
Pre Lab # 10 JFET transfer characteristics Q # 01: What is JFET forward transconductance? Write down its formula? Q # 02: Write down the equation of drain current to express transfer characteristics of JFET? Q # 03: The VGS of a certain n-channel JFET is increased negatively. Does the drain current increase or decrease? ELECTRONICS-II 14
Pre Lab # 11 JFET self bias network Q # 01: Draw a circuit of self bias JFET network? Q # 02: Describe and explain briefly the graphical analysis of self bias JFET? ELECTRONICS-II 15
Pre Lab # 12 JFET voltage divider bias network Q # 01: Draw a circuit of voltage divider bias JFET network? Q # 02: Write down the formula of voltage divider for the above circuit? Q # 03: What is Q point stability of JFET voltage divider network? Explain briefly? ELECTRONICS-II 16
Pre Lab # 13 JFET as a common source amplifier Q # 01: When V gs, is at its positive peak, at what points are Id and V ds? Q # 02: What is the difference between Vgs and V Gs? Q # 03: What factors determine the voltage gain of a common-source FET amplifier? ELECTRONICS-II 17
Pre Lab # 14 JFET as a common drain amplifier Q # 01: When V gs, is at its positive peak, at what points are Id and V ds? Q # 02: What is the difference between Vgs and V Gs? Q # 03: What factors determine the voltage gain of a common-drain FET amplifier? ELECTRONICS-II 18
Pre Lab # 15 A stable operation of 555-timer Q # 01: Describe briefly the operation of A stable operation? Q # 02: What is difference between mark time & space time? Q # 03: Write down the formula of time period & frequency of A stable operation? ELECTRONICS-II 19
Pre Lab # 16 Mono stable operation of 555-timer Q # 01: Describe briefly the operation of mono stable operation? Q # 02: Write down the formula of time period & frequency of mono stable operation? Q # 03: What is the effect of the triggering pulse on the output waveform? ELECTRONICS-II 20