What electrical component allows current to flow in only one direction (approximately)?
diode
A diode has approximately two values of ______ depending on _______.
resistance, current direction
The dominant resistances of a diode are very large or very small.
true
The initial-design goal for the transistor was a component with
variable resistance
Another word for "mathematically proportional to"
transformation
The original designers of the transistor were trying to make a
variable resistor
The transistor was designed by ______ in the ______.
Bell Labs, 1940s
Transformative-changing variable resistor was the first name proposed for the _____ by the ______.
transistor, designers
Transforming resistor was the second name proposed for the
transistor
The name for the transistor was selected from the two words:
transforming and resistor
A transistor is most like a
resistor
Signal input to the "transforming resistor" is into the
base
"power" input to the "transforming resistor" is into the
collector
"power" output from the "transforming resistor" is from the
emitter
Trans in transistor was derived from
transformative
sistor in transistor was derived from
resistor
One A/D or D/A with one bit-size can have several sensitivities depending on the voltage or current range, if the range is variable.
true
The numerical value and corresponding analog value in a A/D or D/A can be calculated by
interpolation
The rise time of the general-purpose OPAMP is about
3000ns
The A/D or D/A analog signal is usually _____, but sometimes _____ signal.
voltage, current
The rise time of 7400 series digital TTL chips are about
6ns to 33ns
Digital signals are ____, and analog signals are _____.
discrete, continuous
The output of a digital integrated circuit is said to be discrete, because only the ON state and OFF state are considered useful.
true
The settle time of the THS4211 OPAMP is
22ns
Analog signals into a computer are converted to digital values through _____ converters
A/D
The actual signals inside a computer are
always digital
The values of interest in an analog signal are
all values between and including minimum and maximum
The values of interest in a digital signal are
on or off
The output of an opamp is usually considered
continuous
Computers produce analog output signals through _____ converters.
D/A
Common A/D and D/A converters are 8, 10, 12, 16 bits. A 10-bit converter utilizes _____ discrete numerical values.
1024
The rise time of CMOS (low-power) digital chips are about
500ns
The sensitivity of an A/D or D/A is the smallest voltage or current change corresponding to a digital change of one count.
true
LabVIEW Front Panel contains
controls and indicators
LabVIEW Front Panel contains
virtual instruments
LabVIEW Block Diagram contains
the program
LabVIEW Block Diagram contains
preprogrammed blocks of computer code
Almost every object/icon on the Front Panel has a corresponding object/icon on the Block Diagram
true
The controls on the Front Panel include
only the slide
The indicators on the Front Panel include
meter, rule weights, and error out
The Tools Pallet is for changing the way the mouse pointer works and is valid for
both the Front Panel and Block Diagram.
In the first row of the Tools Pallet is rectangular region, that is currently grey, which means that the mouse pointer functionality is
manually selected from the options shown.
In the first row of the Tools Pallet is rectangular region, that is currently grey, but will turn green when clicked, which means that the mouse pointer functionality is
automatically selected by the context of what is pointed at.
Most icons on the Front Panel were selected from the 100s available, by right clicking anywhere in the
Front Panel
Most icons on the Block Diagram were selected from the 100s available, by right clicking anywhere in the
Block Diagram
The lower-right quadrant of the Front Panel is not part of the Front Panel. It is presented to demonstrate where to find the
slide and meter
The digital display for the slide, currently showing 9.84, is not shown by default. The digital display is included by right clicking the slide and selecting it
true
The lower-left quadrant of the Block Diagram is not part of the Block Diagram. It is presented to demonstrate where to find the
Fuzzy Controller, Build Path, and Current VI path
The grey line containing the Fuzzy Controller and most icons on the block diagram is a ____ Loop.
While
In the lower-right of the While Loop on the Block Diagram is a red-stop function. The VI can be stopped by pressing the
rectangular-stop button on the Front Panel.
The rectangular-stop button on the Front Panel can be created by right clicking the red-stop function in the Block Diagram with the wiring tool, and then selecting "control".
true
The Arrow Pointer in the Tools Pallet is used for
moving icons around
The Finger Pointer in the Tools Pallet is used for
changing values
The Wire-Spool Pointer in the Tools Pallet is used for
drawing wires
VI stands for
Virtual Instrument
One A/D or D/A with one bit-size can have several sensitivities depending on the voltage or current range, if the range is variable.
true
The sensitivity of an A/D or D/A is the smallest voltage or current change corresponding to a digital change of one count.
true
The A/D or D/A analog signal is usually _____, but sometimes _____ signal.
voltage, current
The numerical value and corresponding analog value in a A/D or D/A can be calculated by
interpolation
Common A/D and D/A converters are 8, 10, 12, 16 bits. A 10-bit converter utilizes _____ discrete numerical values.
1024
Analog signals into a computer are converted to digital values through _____ converters.
A/D
Computers produce analog output signals through _____ converters.
D/A
The actual signals inside a computer are
always digital
The values of interest in an analog signal are
all values between and including minimum and maximum
The values of interest in a digital signal are
on or off
The settle time of the THS4211 OPAMP is
22ns
The rise time of the general-purpose OPAMP is about
3000ns
The rise time of CMOS (low-power) digital chips are about
500ns
The rise time of 7400 series digital TTL chips are about
6NS TO 33NS
The output of a digital integrated circuit is said to be discrete, because only the ON state and OFF state are considered useful.
true
The output of an opamp is usually considered
continuous
Digital signals are ____, and analog signals are _____.
discrete, continuous
The rule of thumb for designing the base resistor for a 2N3904 switch is to use hFE=____.
20
One way to design for a power transistor is allow ___ more base current than you actually need, to make sure the device remains saturated.
5x
The BJT switch should be designed to work with the ____ hFE.
minimum
In both cut-off and saturation, _____ power is dissipated in the transistor.
minimum
In saturation, the BJT base current is
maximum
In saturation, the BJT collector-emitter voltage (Vce) is
minimum
In saturation, the BJT collector current (Ic) is
maximum
In saturation, the BJT is fully
on
In cut-off, the BJT collector-emitter voltage (Vce) is
high
In cut-off, the BJT collector current (Ic) is
zero
In cut-off, the BJT base current is
zero
In cut-off, the BJT is fully
off
For use as a switch, the BJT operates in the regions of the output curves called
saturation and cut-off
The transistor output characteristic curves have constant
Ib
The transistor output characteristic curves show ___ on vertical axis.
Ic
The transistor output characteristic curves show ___ on horizontal axis.
Vce
For a transistor there are input, output and transfer characteristic curves. The _____ transfer characteristic curves may be most useful in switch design.
output
If the transistor is biased into saturation or cut-off, it will be used as
a switch
If the transistor is biased into the linear region, it will be used as
an amplifier
A bipolar junction transistor (BJT) can be used in many circuit configurations; as an amplifier, oscillator, filter rectifier or just used as a
