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ECE212s (UG2023) - Introduction to Electronics (39309)

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For a quartz crystal, if the series resonance frequency is equal to 8.3 MHz, then the parallel resonance frequency is roughly equal to ..... MHz.

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For the shown active LPF, if the gain at the cutoff frequency is equal to 17 dB and R1 = 5.5 kOhm, then R2 = ..... kOhm.

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For a Wien bridge oscillator, if fo = 9.2 kHz and C = 7.7 nF, then R = ..... kOhm.

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A sine-wave with amplitude of 12 V is applied to an op-amp in unity gain buffer configuration. If the op-amp supply voltage is 7.9 and the max op-amp output saturates at its supply voltage, then the maximum output voltage will be ..... V.

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An 10V ideal input pulse is applied to an op-amp in a unity gain buffer configuration at t = 0. If at t = 2 us (us = micro-second) the output voltage is 6.7, then the slew rate is ..... V/us.
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Assume the input below is applied to op-amp Miller integrator that has R = 16.9 kOhm and C = 17 nF. The final output voltage is ..... V.

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If Rf = 4.5 kOhm, V1 = 0, and V2 = 1.9 V, then Vo = ..... V.

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The circuit below can be used as I-to-V converter (it converts current to voltage). It is known as transresistance or transimpedance amplifier. If a 0.22 mA current source is connected to the input terminal, the output voltage magnitude |Vout| = ..... V.

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An op-amp has slew rate = 2.6 V/us is connected in unity-gain buffer configuration. If the input is a triangular wave with zero dc voltage  that has period T = 2.1 us, then the op-amp will slew if the triangular wave peak voltage exceeds ..... V.

Hint: Note that the given time is a whole period of the triangular wave.

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For the shown amplifier, if R1 = 2 kOhm and R2 = {R2} kOhm, then the input resistance is equal to .....

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