問題一覧
1
Operational amplifiers are frequently used in active filter designs?
true
2
Germanium diodes have a forward voltage drop of __ to __
.25 .30
3
?
Step recovery
4
Active filters are implemented using…
passive and active components, require an outside power source
5
Voltage through each component in a parallel circuit is
the same
6
LED’s typically have __ V drop for red and __ V drop for blue
1.7 4.0
7
______ leads ______ in an capacitive circuit
current voltage
8
?
PIN
9
Doubling the power represents an increase of __ and half the power would be __
3dB, -3dB
10
Wire diameter decrease by __ gauge increases by __ (base of __)
2, 6, 3
11
Current through each component in a Series Circuit remains
the same
12
Frequency is a measure of how often a ____ repeats itself
signal
13
?
Schottky
14
Low pass filters
presents less attenuation to low-frequency signals than high-frequency signals, signals passes through an inductor or capacitor provide path to ground
15
What is this?
PNP transistor, IC=IE- IB
16
High pass filters
Signal passes through a capacitor or has a path to ground through an inductor , presents less attenuation to high-frequency signals than low-frequency signals
17
?
Shockley
18
what is a diode?
A semiconductor device that allows the flow of current in one direction
19
?
Tunnel
20
What is a capacitor?
Blocks DC allows AC, Stores energy in an electrical field between a pair on closely spaced conductors (plates)
21
Passive filters are?
linear filters based on combinations of resistors, inductors and capacitors
22
Active filters can have ______, and can achieve ______ without use of _______.
High Q factor , resonance, inductors
23
Current through each component in a parallel circuit is
different
24
?
vacuum tube
25
An OpAmp cannot amplify more than the______
supply voltage
26
Ripple voltage is ?
The portion of a rectified DC voltage that is AC
27
Schottky Diodes can be rated as low as __ V drop
.2
28
?
Varactor
29
?
Constant Current
30
?
Zener
31
Voltage through each component in a series circuit is
different
32
Active filters upper frequency limit is limited by the ______ of the amplifiers used
bandwidth
33
what is this?
NPN transistor, IE=IB +IC
34
small silicon diodes have anywhere between a __ and __ V drop
.6 .7
35
what are the 3 types of capacitors?
fixed, variable, polarized
36
_________ can be used to measure low DC voltage, wave lengths, audio and phase shifts
oscilloscope
37
?
Generic
38
Passive filters
do not depend on external power supply, do not contain active components
39
NiCad battery voltage?
1.45vdc
40
?
Photo-
41
what is this
non-inverting amplifier, + input remains + output
42
which is true?
Anode + Cathode -
43
?
Light-emitting
44
Inductors do what?
Store energy in a magnetic field around a conductor, Blocks AC allows DC
45
A GFCI works by tripping when sensing a current difference more than __ mA between hot and neutral
5mA
46
what is this?
inverting amplifier, - input becomes + output
47
BJT bipolar junction transistors
output current is controlled by a small input current, BASE: controls current EMITTER: source COLLECTOR: output current
48
______ leads ______ in an inductive circuit
voltage current
49
Lead Acid Calcium battery voltage?
2.25vdc
50
The main purpose of ___________ is to graph an electrical signal as it varies over time.
oscilloscope
51
Lead Acid Antimony battery voltage?
2.15vdc