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Hi there!
For the transformer question I would choose a) because if there is the need to increase impedance than the secondary has to have more turns than the primary. Zp/Zs=(Np/Ns)^2
For the RC active filter question, I'd choose b) due to the fact that there is no perfect capacitor and some inductance will be present, which may have a significative effect at higher frequencies.
For the picture, I'd pick the a) just because all of the other answers are not correct for my thinking. Even for a) I have still doubts because if it is a DC-DC regulator for me the C1 is there just to filter the input DC signal which may contain some voltage fluctuations.
For the transformer question I would choose a) because if there is the need to increase impedance than the secondary has to have more turns than the primary. Zp/Zs=(Np/Ns)^2
For the RC active filter question, I'd choose b) due to the fact that there is no perfect capacitor and some inductance will be present, which may have a significative effect at higher frequencies.
For the picture, I'd pick the a) just because all of the other answers are not correct for my thinking. Even for a) I have still doubts because if it is a DC-DC regulator for me the C1 is there just to filter the input DC signal which may contain some voltage fluctuations.
Transformer question - correct.
Voltage regulator question - I agree, none of the choices are great. It might be a mis-translation (to go with the misspelling).
There is no active filter question. For the active oscillator question - incorrect. Surface mount ceramic capacitors have self-resonant frequencies in the hundreds of MHz, way outside the bandwidth of the vast majority of opamps (interesting spelling).
ak
Voltage regulator question - I agree, none of the choices are great. It might be a mis-translation (to go with the misspelling).
There is no active filter question. For the active oscillator question - incorrect. Surface mount ceramic capacitors have self-resonant frequencies in the hundreds of MHz, way outside the bandwidth of the vast majority of opamps (interesting spelling).
ak
First of all thanks for the quick reply!
For the active RC oscillator question... I'd pick c) as I understand that there is no ideal OpAmp so there is a limitaion on high frequency response of them. In the real world, there's a limit on the highest frequency (bandwidth) and fasted edge the opamp can process.
Am I right?
For the active RC oscillator question... I'd pick c) as I understand that there is no ideal OpAmp so there is a limitaion on high frequency response of them. In the real world, there's a limit on the highest frequency (bandwidth) and fasted edge the opamp can process.
Am I right?
