Design your own oscillator based on the Wein-bridge configuration. (See Alexander section 10.9.2.) Use one of the two circuits below. Each has a non-linear element (lamp or diodes) to stabilize the circuit. The non-linear element is needed to ensure that the amplification will be exactly three (otherwise, the op-amp output increases to one rail or the other or decays to zero). C₁ R₁ 50 k P1 * www 10 K lamp off® R amplitude adjust 500 R C 3) Explain why each circuit has an adjustable potentiometer 4) Describe the Barkhausen criteria in your own words 5) Explain why the amplification must be three f= 1) Discuss why you chose the resistor/capacitor values you selected. 2) Show hand calculation of the expected frequency output (sine) Use the LM358 as your op-amp and only use capacitors and resistors that you have on hand. You should have bought a lamp from first term or you just can use a couple of diodes 1N4004. 2лRC