8) This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of safe working practices and developing solutions to analogue electronic problems. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-EH145A Analogue electronic circuits and systems Evidence shall show an understanding of analogue electronic circuits, applying safe working practices and relevant Standards, Codes and Regulations to an extent indicated by the following aspects: Single-stage analogue electronics T1. Understanding of differential amplifiers using discrete components (transistors) of suitable characteristics to meet system objective differential gain, common mode rejection ratio and the required CMRR variable gain input stage T2. Operational amplifier circuits use of d.c. offset operation of single-supply inverting and non-inverting amplifiers employing DC offset bias at the input and blocking capacitors operation of a high input resistance unity gain areas of use for single-supply amplifiers. T3. Comparator circuits (open loop, limited swing and hysteresis) using operational amplifiers: ideal op-amp comparator typical uses of the comparator. comparators with limited (i) negative swing and (ii) both positive negative swing hysteresis comparator with positive resistor divider feedback and calculate the input switching voltages. desirable properties of an operational amplifier for use as comparator and the characteristics of comparator op amps. T4. Amplifiers with given piecewise linear transfer characteristics T5. Operation and building precision of half-wave and fullwave rectifiers precision two-diode half-wave and full-wave rectifier typical applications of precision rectifiers. T6. Oscillators Operation of oscillators Purpose of oscillators Conditions for sustained oscillation Operation of phase shift oscillators The operation and characteristics of a Colpitts oscillator Conditions that cause instability in amplifier circuits Advanced power amplifiers Analysing the performance of power amplifiers Minimum power, voltage and current rating of an output transistor. Aspects of heat transfer related to heat sinking. Common forms of distortion encountered in power amplifiers. (eg. Total harmonic distortion) Techniques for overcoming common forms of distortion. T9. (is the number correct?)Classes of power amplifiers and indicate typical maximum efficiencies for each class conduction, angle, output power and efficiency of a power amp. typical and/or maximum efficiencies of each class of power Amp. d.c and/or a.c load line, output power and efficiency of a large signal amplifier T10. Operation of each class and type of power amplifier circuit load line operation. Class A – direct, RC, transformer coupled. Class B – Complementary symmetry, drivers, single supply/duel supply. Class C and Class D. measure the characteristics of a fully integrated operational power Amplifiers. T11. Active filters frequency response of low-pass, high-pass, low-Q band-pass, high-Q bandpass, notch and all-pass filters and define pass-band, stop-band and rate of roll-off. main features in the amplitude and phase plots of Butterworth, Chebyshev, Cauer-Elliptic and Bessel filter responses. pros and cons of active and passive filters. non-unity gain Sallen-Key low-pass filter. Types of active filters available in IC form - Variable filter, Switched Capacitor Filters and digital (sampled data) filters. Low-Q (i.e. cascade of lowpass and high-pass) and/or narrow bandpass filters |