Question

Vout should be a sinusoid signal of 12Vp-p

Dc voltage to uA741 : +/-8.5V

Please simulate as well

Experiment 5. RC Sinusoidal Oscillators PURPOSE: This laboratory provides an introduction to the background, analysis and design of sinusoidal oscillators using RC feedback networks and active devices to achieve the criteria for continuous oscillations to occur. EQUIPMENT REQUIRED : 1 Operational amplifier u.A741 1 CEU development station Resistors and capacitors as required INTRODUCTION : An understanding of the factors that influence stability is fundamental to the successful design of many electronic systems. The engineer may need to minimize the time for a position control system to reach a particular condition or possibly frequency response tailoring of a high order active filter is required. In either case optimization may lead to marginal stability with the possibility of transfer function poles becoming dangerously near transition into the right hand side of the complex plane. In the design of an oscillator the promotion of marginal instability is a design requirement. A useful way to view oscillator principles is to the use a mechanical analogy and consider the motion of a pendulum. This is a second order system with energy stored in the form of potential and kinetic energy. In motion, energy is continuously traded between these two forms while being dissipated through frictional losses. If no energy is injected into the system it will ultimately come to rest. To keep the pendulum swinging, injection of energy is required. However if too little energy is injected, the motion will decay : too much energy and the amplitude of successive swings will increase resulting in instability. A major goal of design is to arrange for injection of energy to exactly counterbalance the losses. Whether one is considering a mechanical, electrical or any other type of oscillating system this is a fundamental concept which may be stated as follows (System gains) = (System losses) (5.1)

please help, im completely lost on this

this is all of the information

Answer 1

The given circuit are oscillator.

Important points in oscillator by making postive feedback or phase shift 180 degree even without input ac there will be sustained oscillation in the circuit.

Doubt may come with out input how can oscillator produce output waveform actually it takes energy from DC signal given fir biasing and uses it to produce output.

General procedure to solve is to may the phase shift in feedback path as 180 degree.

And then solve by using network analysis and put imaginary part =o to get relation for frequency since at 180 degree phase shift imaginary part is zero.

The frequency is derived in above problem using this criteria only.