4.1.1.C1 Diode Circuits

What is the Mean Output Voltage of a Full Wave Bridge Rectifier? A. 0.637 x Peak Voltage B. 0.5 x Peak Voltage C. 0.707 x Peak Voltage

A. 0.637 x Peak Voltage

The Peak Inverse Voltage PIV of a Center Tap Full Wave Rectifier is ? Were Vp(out) = Output peak voltage A. 2 Vp(out) B. 2 Vp(out) x pi C. Vp(out) / 2

A. 2 Vp(out)

For Good Smoothing of a Rectifier Circuit the Time Constant of the Smoothing R-C Circuit should be? A. About 5 times the Input Frequency B. About 2 Times the Input Frequency B. About Half the Input Frequency

A. About 5 times the Input Frequency

The Peak Inverse Voltage PIV of a Half Wave Rectifier without a smoothing capacitor is ? A. Equal to Peak Input Voltage B. Equal to Input RMS C. Twice Peak Input Voltage

A. Equal to Peak Input Voltage

Under normal operation a TVS diode provides? A. High Impedance B. Low Impedance C. Low Resistance

A. High Impedance

A smoothing Capacitor used in a Half Wave Rectifier Circuit is connected in what way? A. In Parallel with the load resistor B. In Series with the Load Resistor C. Not directly connected to circuit at all

A. In Parallel with the load resistor

Adding a Smoothing Capacitor to a Rectifier Circuit has what effect on the Average Output Voltage? A. Increases B. Stays the Same C. Decreases

A. Increases

Positive Clipper Circuits clip the....... of the input waveform? A. Positive Half B. Negative Half C. Both sides

A. Positive Half

In a Negative Clamper Circuit....? A. Positive Peaks are Lowered to ground or Zero level B. Positive Peaks are moved up or down to ref voltage C. Negative Peaks are raised to ground or Zero level

A. Positive Peaks are Lowered to ground or Zero level

If the Cathode of the diode faces the Capacitor the Clamper is a...? A. Positive one B. Negative one C. Either

A. Positive one

To change a Clipper Circuit from a Positive to a Negative Clipper you would? A. Reverse the Diode Polarity B. Change Diode Type C. Add a Resistor in Parallel

A. Reverse the Diode Polarity

The Current Output of a Half Wave Rectifier is? A. Unidirectional B. Bi-Directional C. Both

A. Unidirectional -The current only flows in one direction even if the size of the current varies

The Formula for the Time Constant of an RC (Resistor/Capacitor) Circuit is?..Where R= Resistance, C = Capacitance A. Time Constant = RC B. Time Constant = R/C C. Time Constant = 2R/C

A. Time Constant = RC

The Output Frequency for a Full Wave Bridge Rectifier is? A. Twice the Input B. Half the Input C. The Same as Input

A. Twice the Input

The Ripple Frequency for a Center Tap Full wave rectifier is? A. Twice the Input B. Half the Input C. The Same as Input

A. Twice the Input

What is the RMS Value of a Half-Wave Rectified Sine Wave? A. 0.637 x Peak Voltage B. 0.5 x Peak Voltage C. 0.707 x Peak Voltage

B. 0.5 x Peak Voltage

What is the Mean Output Voltage of a Full Wave Bridge Rectifier? A. 1/pi x Peak Voltage B. 2/pi x Peak Voltage C. 2 x pi x Peak Voltage

B. 2/pi x Peak Voltage - 2/pi = 0.637

As a General Rule of thumb the Output Ripple Voltage of a Full Wave Rectifier Circuit with Smoothing Capacitor such be kept? A. Above 1.5 Volts B. Below 100mV C. 100-115Volts

B. Below 100mV - It is better to have a smoother DC output voltage with little Ripple Voltage

A Half Wave Rectifier is an example of which of the following circuits? A. Clamper Circuit B. Clipper Circuit C. Bridge Rectifier

B. Clipper Circuit

A Limiter Circuit is another name for which type of Diode Circuit? A. Clamper Circuit B. Clipper Circuit C. Full Wave Rectifier

B. Clipper Circuit

The Peak Inverse Voltage PIV of a Full Wave Bridge Rectifier is ? A. Twice Peak Input Voltage B. Equal to the Peak Input Voltage C. Vp(out) / 2

B. Equal to the Peak Input Voltage

What is the wavelength of a Center Tap Full Wave Rectifier? A. Twice the Input B. Half the Input C. The Same as Input

B. Half the Input

In a Biased Clamper Circuit....? A. Positive Peaks are Lowered to ground or Zero level B. Positive or Negative Peaks can be moved up or down to ref voltage C. Negative Peaks are raised to ground or Zero level

B. Positive or Negative Peaks can be moved up or down to ref voltage

Peak Voltage multiplied by 1/√2 will give you....? A. RMS for a Half-Wave and Full-Wave Rectifier Output B. RMS for a Full-Wave Rectifier Output and Sine Waves C. Avg Voltage for Half Wave Rectifier

B. RMS for a Full-Wave Rectifier Output and Sine Waves - Both are calculated by multiplying 0.707 x peak voltage

A Smoothing Capacitor is often used in a Half Wave Rectifier circuit to smooth the Output, these are also called? A. PIV Capacitors B. Reservoir Capacitors C. CCP Capacitors

B. Reservoir Capacitors

The Time Constant of a Circuit is measured in? A. Ohms B. Seconds C. Amps

B. Seconds

The Components Required to make a Voltage Tripler Circuit are? A. Three Diodes and two Capacitors B. Three Diodes and Three Capacitors C. Two Diodes and Two Capacitors

B. Three Diodes and Three Capacitors

How is the Output Average Voltage of a Center Tap Full Wave Rectifier calculated? ..Where Vp(out) is the Output Peak Voltage A. Vavg (Vdc) = Vp(out) / pi B. Vavg (Vdc) = 2Vp(out) / pi C. Vavg (Vdc) = 2Vp(out) x pi

B. Vavg (Vdc) = 2Vp(out) / pi

In a half wave rectifier where Vrms is the RMS Voltage of the input waveform, the output Average Voltage can be calculated by......? A. Vdc = Vrms x 0.318 B. Vdc = Vrms x 0.45 C. Vdc = Vrms

B. Vdc = Vrms x 0.45 - Not to be confused with the Formula for finding the RMS of a Half Wave Rectifier Output which is 0.5 x Peak Voltage

The Ripple Frequency for a half wave rectifier is................ the line Frequency? A. Twice B. Half C. the Same as

C. the Same as

What is the RMS Value of a Full Wave Rectifier output? A. 0.637 x Peak Voltage B. 0.5 x Peak Voltage C. 0.707 x Peak Voltage

C. 0.707 x Peak Voltage

What is the RMS Value of a Sine Wave? A. 0.637 x Peak Voltage B. 0.5 x Peak Voltage C. 0.707 x Peak Voltage

C. 0.707 x Peak Voltage

If the Average Value of a Half Wave Rectifier Circuit is calculated it can be found to be? A. 64% of the peak input voltage B. 47.3% of the peak input voltage C. 32% of the peak input voltage

C. 32% of the peak input voltage -Average Voltage (Vdc) = 0.318 x Peak Input Voltage -So a more precise value would be 31.8% of peak input voltage

What might the function of a potentiometer in a Clamper Circuit be used for? A. Block the negative half of Sine Wave B. Hold a Charge for negative cycles C. Bias the Circuit

C. Bias the Circuit -Potentiometers can be used in series with diode to bias the circuit

A Transient Voltage Suppression Diode TVS is connected in what configuration to the Component to be protected. A. In Series with the component B. In Inverse Series C. In Parallel

C. In Parallel

How is a Reservoir Capacitor Connected with a Full Wave Bridge Rectifier to smooth the output? A. In Series with the AC source B. In Series with the Load C. In Parallel with the Load

C. In Parallel with the Load

How is a Reservoir Capacitor Connected with a Rectifier to smooth the output? A. In Series with the AC source B. In Series with the Load C. In Parallel with the Load

C. In Parallel with the Load

In a Positive Clamper Circuit ....? A. Positive Peaks are Lowered to ground or Zero level B. Positive Peaks are moved up or down to ref voltage C. Negative Peaks are raised to ground or Zero level

C. Negative Peaks are raised to ground or Zero level

What is a Flywheel Diode? A. A Diode in series with the base terminal of a BJT as a buffer, to insure correct voltage B. As a voltage regulator C. Protect sensitive components from Voltage spikes when relays are switched off

C. Protect sensitive components from Voltage spikes when relays are switched off

The Components required for a unbiased Clamper Circuit are? A. Resistor , Diode, AC source B. Resistor , two Diodes,, AC source C. Resistor , Diode, AC source, Capacitor

C. Resistor , Diode, AC source, Capacitor

The Components required for a Biased Clamper Circuit are? A. Two Resistor , Diode, AC source,DC Bias Voltage B. Resistor , two Diodes, AC source, Capacitor C. Resistor , Diode, AC source, Capacitor, DC bias

C. Resistor , Diode, AC source, Capacitor, DC bias

The Two General Configurations of a Diode in a Clipper Circuit are? A. P-Type, N-Type B. Offside, Nearside C. Series, Shunt

C. Series, Shunt

Peak Voltage multiplied by 1/√2 will give you what value for a Sine Wave? A. The Average Voltage B. The Peak-to-Peak Voltage C. The RMS Value

C. The RMS Value

The Ripple Frequency for a half wave rectifier is? A. Twice the Input B. Half the Input C. The Same as Input

C. The Same as Input

The Output Frequency for a half wave rectifier is? A. Twice the Input B. Half the Input C. The Same as Input

C. The Same as Input -A half-wave rectifier conducts once for each full cycle of input voltage, the frequency of the pulses is the same as the frequency of the input sine wave.

The Peak Inverse Voltage PIV of a Half Wave Rectifier with a smoothing capacitor is ? A. Equal to Peak Input Voltage B. Equal to Input RMS C. Twice Peak Input Voltage

C. Twice Peak Input Voltage........During the negative half cycle of the Input signal the diode experiences a reverse voltage of -V(peak) from the input signal, but at the same time the capacitor also tries to discharge through the diode which adds another reverse bias voltage across the diode. Therefore the PIV of the diode is 2V(peak)

The Components Required to make a Voltage Doubler Circuit are? A. Three Diodes and two Capacitors B. Three Diodes and Three Capacitors C. Two Diodes and Two Capacitors

C. Two Diodes and Two Capacitors

What is the Formula for Calculating the Voltage Ripple of a Full Wave Rectifiers Output? A. V(ripple) = I(load) / f C B. V(ripple) = RMS ripple/Vdc C. V(ripple) = I(load) / 2 f C

C. V(ripple) = I(load) / 2 f C Where I(load) is the current through the load , f is the frequency of the input and C is the Capacitance of the RC Circuit

The Average DC Voltage (Vdc) of a half wave rectifier without a smoothing capacitor is calculated with which equation where Vmax = Peak Input Voltage? A. Vdc = Vmax/1.4 B. Vdc = Vmax x 1.14 C. Vdc = Vmax x 0.318

C. Vdc = Vmax x 0.318 - Another way of looking at it is Vdc = 1/pi x Vmax - 1/pi = 3.18 (try it on a calculator)

The Average DC Voltage (Vdc) of a half wave rectifier without a smoothing capacitor is calculated with which equation where Vmax = Peak Input Voltage? A. Vdc = Vmax/1.4 B. Vdc = Vmax x rho C. Vdc = Vmax/ pi

C. Vdc = Vmax/ pi - Many equations show Vdc is equal to the peak voltage divided by pi, or a better value of 0.318

How is the Peak Output Voltage of a Center Tap Full Wave Rectifier calculated? ..Where Vp(sec) is the secondary transformer Peak Voltage A. Vp(out) = Vp(sec) x pi B. Vp(out) = Vp(sec) x 2 C. Vp(out) = Vp(sec) / 2

C. Vp(out) = Vp(sec) / 2 -The Peak Output Voltage is Half the Secondary Transformers peak voltage as one of the circuit connections is made half way along the transformer

How is the Peak Output Voltage of a Center Tap Full Wave Rectifier calculated? ..Where Vp(sec) is the secondary transformer Peak Voltage A. Vp(out) = Vp(sec) x pi B. Vp(out) = Vp(sec) x 2 + 0.7 C. Vp(out) = Vp(sec) / 2 - 0.7

C. Vp(out) = Vp(sec) / 2 - 0.7 -0.7 is the voltage drop across the diode, it is omitted in some equations when it is assumed that the diode is ideal