mid-term test review...• sallen-key • vcvs • bi-quad • multiple feedback r1 r2 r4 r4 r4 r3 c...
TRANSCRIPT
M i d - T e r m T e s t R e v i e w
X M U T 3 0 3 A n a l o g u e E l e c t r o n i c s
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M i d - t e r m Te s t
2 Hours
Bring calculator and dictionary
4 Questions, 25 marks each
Time and Place: T. B. A.•
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Q u e s t i o n T y p e s
Expect 3 types of question in the test:
• Explain…(a) [5 marks] Two common classes of operational amplifiers use BJTs and JFETs as their input
devices. Explain why you would choose one or the other.
• Calculate…(b) [5 marks] Show that the output voltage, vO, can be expressed in terms of the input
voltages, v1 and v2, as
• Design…(c) [10 marks] Design and sketch an external nulling circuit to remove the expected offset error.
R2 (R1 + R2) R4vO v1 + v2.
R1 (R3 + R4) R1
= −
Topics
1. Operational Amplifiers2. Op Amp Analysis3. Op Amp Circuits I 4. Op Amp Circuits II
1. Operational Amplifier (Lab)
• Amplifiers; ∫,∂-ers; filters; ∑,∆-ers
• Measuring Zin, Zout, freq. response
• Colour & numerical codes for passives
• PSU, function generator, oscilloscope, multi meter, and breadboard operation
1. Operational Amplifier• Nodal analysis: 𝐴𝑣 , 𝑍𝑖𝑛 , 𝑍𝑜𝑢𝑡• Differential vs Common Mode
• Circuit Topologies
T1 R1 R2
vI vO
R1R2
v1 vo1 R1 R2
R3
RGvO
R3
v2vo2 R1 R2
2. Op Amp Analysis
• Op amp internals
• Dynamic Imperfections
• Static Imperfections
Input
C
High
Gain
Output
• Nulling
2. Op Amp Analysis
• Feedback
• ROC, Peaking, Ringing
• Compensation
• Loading
3. Op Amp Circuits I
Basic Op Amp Circuits:• Inverting amplifier• Non-inverting amplifier• Voltage follower• Summing amplifier• Integrator/Differentiator• Differential amplifier• Instrumentation amplifier
4. Op Amp Circuits II
• Comparator (hysteresis, thresholds)
4. Op Amp Circuits II
• Rectifier (half-wave, full-wave)
4. Op Amp Circuits II
• Analogue Switch (applications)
4. Op Amp Circuits II• Oscillators (Wien-Bridge)
4. Op Amp Circuits II
• Amplifiers (Current to Voltage Amplifier)
4. Op Amp Circuits IIFilters• Cut-off frequency• Bandwidth• Q-factor
4. Op Amp Circuits II• Passive Filters:• Low Pass• High Pass• Band Pass• Band Stop
4. Op Amp Circuits II•Active Filter• V-buffer• Sallen-Key• VCVS• Bi-Quad• Multiple Feedback
R1
R2
R4
R4
R4
R3
C
C
ViVo