Transistor-biasing characteristics and load line biasing methods, advantages and disadvantages. Multisage amplifier, DC amplifiers (Darlington Pair, difference amplifier and chopper amplifer)- Features, operation and applications. Power amplifiers-classA, AB,B, C. Effieciency of class B, Basic amplifier circuit design, features, operation and applications, Frequency response and bode plots of AC and DC amplifiers. Small signal amplifiers and hybrid (h) parameters. Oscillators-phase shift, Wien bridge, Hartley, Colpitt and crystal (Pierce, Miller) oscillators. LC tank circuit. Relaxation oscillators-astable, monostable and bistable multivibrators (basic circuit, features operation and applications). Transistors, OAs and diodes and switching circuits-TTL, DTL etc