Quiz 1-3 process control
Peak to peak ripple voltage equation
(1/frlc)Vp(rect)
Line regulator equation
(Delta Vout/delta VIN)100%
Diode clipper circuit equation
(Rl/r1+Rl)Vin
Load regulation equation
(VNL-VFL/Vfl)100%
DC value clamper circuit equation
(Vp(in)-0.7)
When forward-biased, a diode
(b) conducts current
Peak output voltage of bridge rectifier
1.414(rms)
A smaller filter capacitor reduces the ripple.
False
Line and load regulation are the same.
False
PIV stands for positive inverse voltage.
False
T/F The output frequency of a half-wave rectifier is twice the input frequency.
False
T/F The purpose of the capacitor filter in a rectifier is to convert ac to de.
False
T/F The two regions of a diode are the anode and the collector.
False
T/f A diode can conduct current in two directions with equal ease.
False
T/f When reverse-biased, a diode ideally appears as a short.
False
The output voltage of a filtered rectifier always has some ripple voltage
False
The purpose of a clamper is to remove a de level from a waveform.
False
Complete model equation
If=Vbias-0.7/Rlimit+r'd
Practical model equation
If=Vbias-Vf/Rlimit
Ideal model equation
If=Vbias/Rlimit
In the practical diode model
In the practical diode model, the barrier potential is taken into account the forward dynamic resistance is taken into account
one of the diodes in a bridge full-wave rectifier opens, the output is
OV a half-wave rectified voltage
Ripple factor equation
R=Vr(pp)/Vdc
Line regulation is determined by
changes in output voltage and input voltage
27. Load regulation is determined by
changes load current and output voltage
10. Ideally, a diode can be represented by a
switch
9. The V-I curve for a diode shows
the amount of current for a given bias voltage
12. In the complete diode model
the barrier potential is taken into account the forward dynamic resistance is taken into account the reverse resistance is taken into account
When a diode is forward-biased,
the current is produced by both holes and electrons
A diode is normally operated in
the forward-bias region the reverse-bias region
The ideal de output voltage of a capacitor-input filter is equal to
the peak value of the rectified voltage
For a silicon diode, the value of the forward-bias voltage typically
5. For a silicon diode, the value of the forward-bias voltage typically must be greater than 07 V
A semiconductor is a crystalline material with
Strong covalent bonds
A bridge rectifier uses four diodes.
True
A diode limiter is also known as a clipper.
True
T/F The output frequency of a full-wave rectifier is twice the input frequency.
True
T/f A basic half-wave rectifier consists of one diode.
True
T/f A diode conducts current when forward-biased.
True
T/f Each diode in a full-wave rectifier conducts for the entire input cycle.
True
T/f In a bridge rectifier, two diodes conduct during each half-cycle of the input
True
T/f The diode in a half-wave rectifier conducts for half the input cycle.
True
T/f Two types of current in a diode are electron and hole.
True
Voltage multipliers use diodes and capacitors.
True
Average value of full wave rectifier equation
Vavg=2Vp/pie
Average value half wave rectifier
Vavg=Vp\pie
dc value output voltage equation
Vdc=(1-1/2frlc)Vp(rect)
Peak output voltage equation
Vp(in) -0.7
PIV equation
Vp(out)+0.7
Rectified peak output voltage equation
Vp(sec)-0.7
Peak secondary voltage equation
Vp(sec)=nVp(pri)
To forward-bias a diode
an external voltage is applied that is positive at the anode and negative at the cathode an external voltage is applied that is positive at the p region and negative at the n region
The dynamic resistance can be important when a diode is
forward-biased
If the load resistance of a capacitor-filtered full-wave rectifier is reduced, the ripple voltage
increases
Although current is blocked in reverse bias,
there is a very small current due to minority carriers