a) Describe the negative resistance method for designing oscillators. b)Give a definition of an oscillator. What are the conditions (Barkhausen

a) Describe the negative resistance method for designing oscillators.

b)Give a definition of an oscillator. What are the conditions (Barkhausen criterion) that an amplifier with feedback must satisfy?

c) What is meant by the slew rate of an operational amplifier? Under what conditions at the input does an operational amplifier slew its output