

227-0111-00L "Communications Electronics"

Q. Huang

4G, 6 ECTS KP
Bachelor: Elective (Wahlfach) / Master: Minor Subject (Nebenfach)

Foundation course for understanding modern electronic circuits for communication applications.

Introduction, review of bipolar and MOS devices. Basic amplification stages - emitter and source coupled structures; Non-linear analysis, distortion and intermoduation; Distortion in feedback amplifiers; C-E amplifier with shunt feedback, C-E amplifier with emitter feedback; Basic output structures. Stability of feedback amplifiers, effect of feedback on gain, input and output impedance. Transformers and their applications in radio circuits, tuned circuits in bandpass amplifiers, impedance matching and matching networks, bandpass amplifiers. Electronic oscillators, instability and oscillation, frequency domain description, amplitude limiting through bias-shift. The Colpitts oscillator, crystal controlled oscillators, relaxation and voltage controlled oscillators. Analog multipliers, mixers and modulators, the Gilbert multiplier. Mixing, modulation and frequency translation, AM and FM demodulation, automatic gain control. Fundamentals of phase-locked loops; Small-signal analysis, capture and locking; Frequency division by dual modulous prescalers; Phase noise in PLLs.

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