For the shown active filter, if C = 6.1 nF and the cutoff frequency is 67.3 kHz, then R2 = ..... kOhm.

For a quartz crystal, if the series resonance frequency is equal to 8.5 MHz, then the parallel resonance frequency is roughly equal to ..... MHz.

Colpitts oscillator can be built using a quartz crystal and two capacitors.

For the shown amplifier, if R1 = 5.5 kOhm and R2 = 15.3 kOhm, then the gain is equal to .....

Note: Write the gain with its sign.

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 0.32 mA current source is connected to the input terminal, the output voltage magnitude |Vout| = ..... V.

For the shown amplifier, if R1 = 2.3 kOhm and R2 = {R2} kOhm, then the input resistance is equal to .....

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 5.6 and the max op-amp output saturates at its supply voltage, then the maximum output voltage will be ..... V.

An op-amp has slew rate = 3 V/us is connected in unity-gain buffer configuration. If the input is a triangular wave with zero dc voltage  that has period T = 1.2 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.

Assume R1 = 3.8 kOhm and R2 = 8.3 kOhm. If Vo = 5 V, then Vi = ..... V.

Assume the input below is applied to op-amp Miller integrator that has R = 11.9 kOhm and C = 10.9 nF. The final output voltage is ..... V.