Electronic Devices And Circuits Set 8
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This set of Electronic Devices and Circuits Multiple Choice Questions & Answers (MCQs) focuses on Electronic Devices And Circuits Set 8
Q1 | The abbreviated designation for input current with a LOW input is
- vih.
- iih.
- iil.
- iol.
Q2 | Fan-out for a typical TTL gate is .
- 10
- 4
- 54
- 100
Q3 | In order to interface an FPGA with an external device, you must set the value of the
- sink current.
- external power supply.
- source current.
- all of the above
Q4 | The abbreviated designator for a LOW output voltage is
- voh.
- vil.
- vol.
- vih.
Q5 | The lower transistor of a totem-pole output is saturated when the gate output is
- high.
- low.
- malfunctioning.
- over driven.
Q6 | Typical TTL HIGH level output voltage is
- 0.3 v.
- 5.0 v.
- 3.4 v.
- 4.8 v.
Q7 | The standard 74XX TTL IC family was originally developed in the
- 1970s.
- 1960s.
- 1950s.
- 1940s.
Q8 | The minimum output voltage recognized as a HIGH by a TTL gate is
- 0.8 v.
- 2.4 v.
- 5.0 v.
- 2.0 v.
Q9 | An open-collector TTL gate
- can sink current but cannot source current.
- can source current but cannot sink current.
- cannot source or sink current.
- can sink more current than a standard ttl gate.
Q10 | The minimum input voltage recognized as a HIGH by a TTL gate is
- 0.8 v.
- 2.4 v.
- 2.0 v.
- 5.0 v
Q11 | Which of the following digital IC logic families is most susceptible to static discharge?
- rtl
- ecl
- mos
- ttl
Q12 | Each input on a TTL gate is connected to the transistor's
- base
- collector
- gate
- emitter
Q13 | The time it takes for an input signal to pass through internal circuitry and generate the appropriate output effect is known as
- propagation delay
- rise time
- fan-out
- fall time
Q14 | In a common emitter, unbypassed resister provides
- voltage shunt feedback
- current series feedback
- negative voltage
- positive current feedback
Q15 | Negative feedback in an amplifier
- reduces gain
- increase frequency&phase distortion
- reduces bandwidth
- increases noise
Q16 | An amplifier without feedback has a voltage gain of 50, input resistance is 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is
- 1/11kΩ
- 1/5kΩ
- 5kΩ
- 11kΩ
Q17 | The fan out of a MOS logic gate is higher than that of TTL gates because of its
- low input impedance
- high output impedance
- low output impedance
- high input impedance
Q18 | Transformer coupling can be used in amplifiers
- only power
- only voltage
- either power or voltage
- neither power nor voltage
Q19 | When negative current feedback is applied to an amplifier, its output impedance
- increases
- remains unchanged
- decreases
- becomes zero
Q20 | The quiescent current of a FET amplifier is
- ids
- id
- id
- id
Q21 | The total decibel voltage gain of two cascaded voltage amplifier where individual voltage gains are 10 and 100 is
- 20
- 60
- 800
- 1000
Q22 | The frequency response of the combined amplifier can be compared with
- an or gate
- a negative feedback amplifier
- a positive filter
- an and gate
Q23 | Minimum interference with frequency response can be given by
- direct coupling
- rc coupling
- transformer coupling
- instrumentation and control
Q24 | The impedance of a load must match the impedance of the amplifier so that
- minimum power is transferred to the load
- the efficiency can be maintained at low level
- the signal-to- noise ratio is maximized
- maximum power is transferred to the load
Q25 | The ratio output rms power in watts to the input dc power in watts in the different amplifier class is called .
- gain
- amplification factor
- efficiency
- phase power