A circuit is shown to the right. a. Is this an example of positive feedback or negative feedback? b. If the circuit is an amplifier, what is the gain and is it inverting or noninverting? If the circuit is a comparator calculate the threshold voltage R2 1 ΚΩ mm R1 5 ΚΩ MM OA V_in sine 1 kHz +12V -12V V_out

Which of the following are most true when comparing balanced (differential) signals to unbalanced (single-ended) signals?A. Balanced signals are less susceptible to noise interference.B. Unbalanced signals use fewer wires.C. Balanced signals use ground for one of the two wires.D. Unbalanced signals take advantage of the common-mode rejection capability of op amps.Two correct possible answers.

Which of the following statement is true? Conjugate matching guarantees the maximum output power regardless of input power. The optimum source impedance for the minimum noise figure can be obtained by conjugate matching condition. O The first stage is the most important to minimize the overall noise figure in cascaded blocks An oscillator cannot be built with a single stage amplifier. None of the above