EL 135 TEST 4 QUESTIONS WELL ANSWERED LATEST UPDATE 2026
What is an Integrated Circuit (IC) - Answers An Integrated Circuit (IC) is a
complete semiconductor circuit
made of a tiny chip of glasslike
material.
Cite three advantages of using ICs
instead of "discrete" components - Answers Smaller, lighter, lower cost, improved performance,
consume less power, and are more reliable
What kind of environment is
necessary for the manufacture of ICs - Answers A "Clean Room" where temperature, humidity, and
dust are precisely controlled
What is a "monolithic IC - Answers A "monolithic" IC When the circuit
is formed within a single semiconductor crystal.
Epitaxial Growth - Answers N layer is grown on a P crystal substrate or vice versa
In the "Photomasking" process, how
is the photoresist material removed
after etching - Answers Chemically stripped
Hybrid IC - Answers multiple chips are mounted inside one chip
Why are many ICs shipped in ESD
packaging - Answers easily damaged by electrostatic discharge (ESD)
What are the two broad classification groups for ICs - Answers Linear (Analog) and Digital
what is the significance of the abbreviations SSI, MSI, LSI, and VLSI - Answers the degree of
miniaturization or circuit density. The larger the term, the smaller the circuit size and higher density
Describe three common packaging
configurations for ICs - Answers . T.O.-5 Metal Can, Flat Pack (SMT),
Dual In-Line Package (DIP
four guidelines to follow when
replacing ICs - Answers 1. Check all external circuitry first.
2. ALWAYS R&R with NO POWER.
3. Use ESD precautions when needed.
4. Use low Watt, grounded tip Iron.
5. Solder to correct terminals.
6. Check all solder connections
three disadvantages of ICs - Answers Can't handle high E, I, or P, ESD sensitivity, and One function
fails, change entire chip
Operational amplifiers have a high "open-loop" gain. How can we control
the gain of an OpAmp to meet our design requirements - Answers Negative feedback (. by utilizing
external resistor
networks which feed a percentage
of the output back to the input)
T or F In-Phase because the Signal is applied to the
NON-INVERTING INPUT - Answers True
T or F The "Voltage Follower" is a Non-Inverting amp with a gain of 1. It is used as a Buffer or Isolation
Amplifier. It is placed between two
circuits that would LOAD each other without it - Answers True
What is the maximum amount of
power dissipation that a type 741 OpAmp will generate - Answers 500 mW
What is the typical input voltage range for a type 741 OpAmp - Answers +- 13v
How many transistors are in a type 741 OpAmp - Answers 20
What happens to the gain of a typical OpAmp circuit if the frequency of
the input signal is increased beyond 1 MHz. - Answers The gain decreases and bandwidth increases as
frequency is increased. Gain = Unity @ 1MHz
Cite some advantages of using LEDs instead of incandescent lamps for
indicator panels, instrumentation, etc - Answers Low Voltage, Long Life, Fast On-Off switching speeds
What are some of the substances used in the manufacture of LEDs - Answers Gallium, arsenic, and
phosphorus.
What is an Integrated Circuit (IC) - Answers An Integrated Circuit (IC) is a
complete semiconductor circuit
made of a tiny chip of glasslike
material.
Cite three advantages of using ICs
instead of "discrete" components - Answers Smaller, lighter, lower cost, improved performance,
consume less power, and are more reliable
What kind of environment is
necessary for the manufacture of ICs - Answers A "Clean Room" where temperature, humidity, and
dust are precisely controlled
What is a "monolithic IC - Answers A "monolithic" IC When the circuit
is formed within a single semiconductor crystal.
Epitaxial Growth - Answers N layer is grown on a P crystal substrate or vice versa
In the "Photomasking" process, how
is the photoresist material removed
after etching - Answers Chemically stripped
Hybrid IC - Answers multiple chips are mounted inside one chip
Why are many ICs shipped in ESD
packaging - Answers easily damaged by electrostatic discharge (ESD)
What are the two broad classification groups for ICs - Answers Linear (Analog) and Digital
what is the significance of the abbreviations SSI, MSI, LSI, and VLSI - Answers the degree of
miniaturization or circuit density. The larger the term, the smaller the circuit size and higher density
Describe three common packaging
configurations for ICs - Answers . T.O.-5 Metal Can, Flat Pack (SMT),
Dual In-Line Package (DIP
four guidelines to follow when
replacing ICs - Answers 1. Check all external circuitry first.
2. ALWAYS R&R with NO POWER.
3. Use ESD precautions when needed.
4. Use low Watt, grounded tip Iron.
5. Solder to correct terminals.
6. Check all solder connections
three disadvantages of ICs - Answers Can't handle high E, I, or P, ESD sensitivity, and One function
fails, change entire chip
Operational amplifiers have a high "open-loop" gain. How can we control
the gain of an OpAmp to meet our design requirements - Answers Negative feedback (. by utilizing
external resistor
networks which feed a percentage
of the output back to the input)
T or F In-Phase because the Signal is applied to the
NON-INVERTING INPUT - Answers True
T or F The "Voltage Follower" is a Non-Inverting amp with a gain of 1. It is used as a Buffer or Isolation
Amplifier. It is placed between two
circuits that would LOAD each other without it - Answers True
What is the maximum amount of
power dissipation that a type 741 OpAmp will generate - Answers 500 mW
What is the typical input voltage range for a type 741 OpAmp - Answers +- 13v
How many transistors are in a type 741 OpAmp - Answers 20
What happens to the gain of a typical OpAmp circuit if the frequency of
the input signal is increased beyond 1 MHz. - Answers The gain decreases and bandwidth increases as
frequency is increased. Gain = Unity @ 1MHz
Cite some advantages of using LEDs instead of incandescent lamps for
indicator panels, instrumentation, etc - Answers Low Voltage, Long Life, Fast On-Off switching speeds
What are some of the substances used in the manufacture of LEDs - Answers Gallium, arsenic, and
phosphorus.
