(TCO 2) A 1 A diode can deliver 1 A up to 75 ºC with a derating factor of 8.5 mA

Question

(TCO 2) A 1 A diode can deliver 1 A up to 75 ºC with a derating factor of 8.5 mA/ ºC above that. How much current can be drawn at 110 ºC?

(TCO 2) Zener diodes are often used as

(TCO 2) In a diode, the bias conditions are

(TCO 2) The n-type regions in an npn bipolar junction transistor are

(TCO 2) Which best describes a field-effect transistor?

(TCO 2) What happens when the base current of a transistor is increased?

(TCO 2) When the collector resistor in a common-emitter amplifier is increased in value, the voltage gain

(TCO 2) A BJT amplifier circuit has RC = 47 k? and RE = 2.2 k?. What is the approximate voltage gain?

(TCO 2) In which FET amplifier configuration is the gain less than unity?

(TCO 2) A common-source FET amplifier has an RD = 1.0 k?. How much does the gain change when a load resistance of 1.0 k? is capacitively coupled to the drain?

(TCO 2) In which FET amplifier configuration is the input signal applied to the source terminal and the signal taken from the drain?

(TCO 2) What value for Ri is required for an inverting op-amp circuit if Rf = 270 k? and the gain is to be -20?

(TCO 2) Determine the CMRR for an op-amp with a differential voltage gain of 2000 and a common-mode gain of 0.2.

(TCO 2) What is the applied voltage for an op-amp system with a gain of 36 dB and an output of 6.8V?

(TCO 2) An op-amp has a differential voltage gain of 200,000. What is the common-mode rejection ratio (in dB) if the output voltage is measured to be 2.0 Vp-p when the input terminals are connected together and a 0.1 Vp-p voltage is applied between the inputs and ground?

(TCO 2) What is the output waveform of an ideal difference amplifier with identical sine waves that are in phase on its two inputs?

(TCO 2) A four-input summing amplifier has all input resistors at 10 k? and the feedback resistor equal to 2.2 k?. If the input voltages are all equal to 2 V, what is the output voltage?

(TCO 2) In a 5 V level detector circuit,

(TCO 2) What type of op-amp circuit should be selected to change a rectangular waveform into a triangular waveform?

Comments:

I have posted this again because the first one I posted did not have the diagrams for Question #8,16,18,19,23 and 24.An answer with some short explanation will be highly appreciated.

Explanation / Answer

2)

Zener diodes are used as voltage references. this is because when the zener diode is reverse biased then the voltage drop across the diode is constant up to breakdown. so, that is why zener diodes are used as voltage references in reverse bias

3)

In a diode, the bias conditions are forward bias and reverse bias. When the applied voltage on anode is postive with respect to cathode then the diode is forward biased. if not it is reverse biased.

4)

The n-type regions in an npn bipolar junction transistor are collector and emitter. this is because the configuration of any BJT is emitter base collector. so, in npn transistor n regions are collector and emitter

13)

we know that the gain of an inverting op-amp is -Rf/Rin. it is given that Rf=270kohm and gain is -20.

=> -20=-(270)/Rin => Rin = 13.5kohm

14)

The CMRR of op-amp is CMRR = 20 log (Ad/Acm) = 20Log(2000/0.2) = 20log(10000) = 20log(10^4) = 20*4=80dB

25)

Basically, to convert an rectangular waveform into triangular waveform, we need to integrate the the rectangular wave. so, we need an integrator. this is because if Vo = integral (1dx) = x.

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