Description

Analog and digital electronic circuits based on bipolar and field effect transistors introduced in ELEC 252 (Electronics I) will be studied. The course is subdivided into two parts; the design and operation of amplifiers and the operation of common logic families. Particular attention is paid to the transient and frequency response of the circuits. The course also includes a study of feedback as applied to the design and analysis of electronic circuits. The laboratory work is design oriented and complements the lecture material.

Course Learning Outcomes (CLOs)

• Perform small-signal and large-signal analysis of differential amplifiers using both bipolar and MOSFET transistors. Calculate the differential gain, the common-mode gain, and the common-mode rejection ratio.
• Design current sources such as current mirrors, Wilson current sources, and Widlar current sources for biasing of amplifiers.
• Design multi-stage operational amplifiers using differential stages, common-emitter, and common collector stages.
• Draw the low-frequency, mid-band frequency, and high-frequency equivalent circuit of an amplifier. Calculate the lower and upper cut-off frequencies of an amplifier using analytic methods and approximation methods such as the short-circuit time constants approach, and the open-circuit time constants approach.
• Apply Miller's theorem to simplify the analysis of high-frequency electronic circuits.
• Design feedback amplifiers using any of the four feedback configurations (shunt/shunt, shunt/series, series/shunt, series/series). Calculate the open loop gain with feedback network loading, calculate the amplifier input and output resistances with loading.
• Determine whether an amplifier is stable or not using Bode plots.
• Design CMOS logic inverters and implement logic functions. Design logic gates for balanced rise and fall times using transistor scaling.

Credit Breakdown

Lecture: 3
Lab: 0.75
Tutorial: 0.5
Total: 4.25

Academic Unit Breakdown

Mathematics 0
Natural Sciences 0
Complementary Studies 0
Engineering Studies 51
Engineering Design 0

Prerequisites for this course: ELEC 252. Corequisite: ELEC 323.

Course Structure and Activities

Weeks 1and 2: Bipolar transistor differential amplifier basic operation; current equations and voltage equations; Differential gain, input resistance calculations; differential amplifier with emitter degeneration, common-mode gain.

Week 3: Offset voltages for non-ideal differential amplifiers due to resistance mismatch, transistor size mismatch, and current-gain mistmatch; current sources: basic current mirror, Widlar current mirror, Wilson current mirror

Week 4: Differential bipolar amplifier with active load; MOSFET differential amplifier current and voltage equations; MOSFET differential amplifier offset voltages due to resistance mismatch, size mismatch, and threshold voltage mismatch.

Week 5: MOSFET current mirrors; BiCMOS amplifiers: double cascode, differential amplifiers; Multi-stage amplifier (op amp) design detailed example.

Week 6: Transfer functions, Bode amplitude and phase plots; Short-circuit time constants approximation and open circuit time constants approximation; low-frequency, mid-band frequency and high-frequency circuit diagrams

Week 7: Common-emitter low frequency response; Common source, common-emitter high frequency response; Miller's Theorem

Week 8: Application of Miller's Theorem to the common-emitter high frequency equivalent circuit; Bipolar cascode amplifier; Common-base amplifier high frequency response

Week 9: Emitter-follower high-frequency response; Common collector-common emitter cascade amplifier; Differential amplifier high frequency response.

Week 10: The negative feedback equation and its meaning, two-port networks (z,y,h,g,s); The four amplifier feedback configurations; Series/Shunt voltage amplifiers

Week 11: Shunt/series current amplifier; Feedback amplifier stability, phase margin, frequency compensation; the CMOS logic inverter.

Week 12: Logic gate propagation delay, power consumption; Logic NAND and NOR gate implementation; Transistor sizing for arbitrary logic function circuit implementation.

Laboratory Studies:

The lectures are complemented with 5 laboratory experiments evenly spread throughout the term.

Tutorials:

Sample problems will be covered weekly to help with the understanding of the course material on the theoretical side. The hour-long tutorials are intended to be interactive directed at filling the gaps in the students' comprehension of the notions.

OnQ Webpage

Already registered in ELEC 353?

Visit the ELEC 353 to OnQ Webpage