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Define: Clamper
A circuit that adds a dc level to an ac voltage using a diode and a capacitor.
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Define: DC power supply
A circuit that converts ac line voltage to dc voltage and supplies constant power to operate a circuit or system.
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Define: Filter
In a power supply, the capacitor used to reduce the variation of the output voltage from a rectifier.
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Define:Full-wave rectifier
A circuit that converts an ac sinusiodal input voltage into a pulsating dc voltage with one output pulse occurring for each input cycle.
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Define: Half-wave rectifier
A circuit that converts an ac sinusiodal input voltage into a pulsating dc voltage with one output pulse occurring for each input cycle.
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Define: Limiter
A diode circuit that clips off or removes part of a waveform above and/or below a specified leve.
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Define: Line regulation
The change in output voltage of a regulator for a given change in input voltage.
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Define: Load Regulation
The change in output voltage of a regulator for a given range of load currents, normally expressed as a percentage.
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Define: Peak inverse voltage(PIV)
The maximum value of reverse voltage across a diode that occurs at the peak of the input cycle when the diode is reverse-biased.
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Define: Rectifier
An electronic circuit that converts ac into pusating dc; one part of a power supply.
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Define: Regulator
An electronic device or circuit that maintains an essentially constant output voltage for a range of input voltage or load values; one part of a power supply
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Define: Ripple voltage
The small variation in the dc ouput voltage of a filtered rectifier caused by the charging and discharging of the filter capacitor.
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Define: Troubleshooting
A systematic process of isolating, identifiying, and correcting a fault in a circuit or system.
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A dc power supply typically consists of what four things?
transformer, diode rectirfier, filter, regulator
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THe output frequency of a half-wave rectifier equals?
the input frequency
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What is (PIV)-Peak Inverse Voltage?
the maximum voltage appearing across the diode in reverse bias.
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How much is output frequency of a full-wave rectifier?
it's twice the input frequency
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What are two basic types of full-wave rectifiers?
center-tapped and bridge
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What is the peak output voltage of a center-tapped full-wave rectifier?
approximately one-half of the total peak secondary voltage less one diode drop
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What is the peak output voltage of a bridge rectifier?
equals the total peak secondary voltage less two diode drops
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What equals the PIV for each diode in a bridge rectifier?
is approximately half that required for an equivalent center-tapped configuration and is equal to the peak output voltage plus one diode drop.
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What does the capacitor-input filter provide?
a dc output approximately equal to the peak of its rectified input voltage.
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The smaller the ________,
the better the _________.
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What is the input or line regulation?
Regulation of output voltage over a range of input voltages.
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What is load regulation?
Regulation of output voltage over a range of load currents.
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What are clippers?
Diode limiters or clippers cut off voltage above or below specified levels.
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What are Diode clampers?
they add a dc level to an ac voltage
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What are voltage multipliers?
they are used in high-voltage, low-current applications such as for electron beam acceleration in CRTs and for particle accelerators.
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What does a voltage multiplier use?
it uses a series of diode-capacitor stages
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