The A matrix of a state space model has eigenvalues: [0.45 2.1j, -3.1] What conclusion can be drawn about the system stability and oscillations? O unstable and oscillates O stable and does not oscillate O stable and oscillates O unstable and does not oscillate

-Design a Phase shift oscillator (BJT, mosfet, op-amp choose one) that operate on 1khz -The output of the system must be 1Vpp

For the oscillator circuit shown below, C1 = 15 pF and C 2= 180 pF and L = 1µH. a) Name the type of LC oscillator b) Calculate the frequency of oscillation. c) If the amplifier circuit is biased to provide a gain of 10, will the circuit oscillate? Why or why not? Vcc R4 Cout Q1 Cin R2 Re * Ce C1 * C2 ww-

Multiple choice questions : 95.Most relaxation oscillators produce sinusoidal outputs. T or F ___ (T) True (F)False   94.The crystal oscillator is based on the photoelectric effect. T or F ___   93.The voltage gain around the closed feedback loop must be greater than 1 to sustain oscillations. T or F ___   92.In the IC phase-shift oscillator, what should the ratio of feedback resistor RF to R1 be? A. Any value B. Zero C. Greater than –29 D. Less than 29   92.The start-up gain of an oscillator must be ________ one. A. less than B. greater than C. None of the above D. equal to