Chapter 9: Basic Diode Concepts and Applications

These flashcards cover key concepts, principles, and applications related to diodes, including characteristics, types, and their importance in electronic circuits.

A diode has ____ terminals.

2

The positive terminal of a diode is called the ____.

Anode

The negative terminal of a diode is called the ____.

Cathode

A diode allows current to flow in ____ direction(s).

one

In forward bias, the anode is ____ and the cathode is ____.

positive; negative

In forward bias, a diode conducts easily at approximately ____ volts.

0.6

In reverse bias, a diode blocks current flow and allows a very ____ current.

small

The phenomenon where a diode allows a sudden increase in current with large negative voltage is called ____ breakdown.

reverse

Semiconductor regions in a diode include ____ and ____.

p-type; n-type

When the p-side of a diode is positive, the barrier ____ and current flows.

lowers

When the n-side of a diode is positive, the barrier ____ and no current flows.

increases

Small signal diodes conduct little current until approximately ____ volts, where current rises sharply.

0.6

Zener diodes are designed to work in the ____ breakdown region.

reverse

The Shockley Diode Equation describes the current-voltage relationship as ____ , I = Is (e^(V/Vt) - 1).

Is (e^(

The thermal voltage (Vt) at 300K is approximately ____ volts.

0.026

Zener diodes are used for ____ regulation.

voltage

The load-line analysis helps find the ____ point in diode circuits.

operating

Diodes are considered ____ devices due to their non-linear voltage-current relationship.

non-linear

During positive half-cycles of AC, a ____ rectifier allows current to flow through the load.

half-wave

During negative half-cycles of AC, output from a half-wave rectifier is _.

zero

The output voltage from a half-wave rectifier follows the input but is reduced by about ____ volts.

0.7

The purpose of adding a capacitor in a half-wave rectifier circuit is to make the DC output _.

smoother

Capacitance (C) in a smoothing capacitor is related to the average load current (Ic) and the ripple voltage (Vr) by the equation C = _.

Ic * T / Vr

Peak Inverse Voltage (PIV) must be higher than the diode's ____ voltage.

breakdown

In a full-wave rectifier, two diodes are used to conduct current during ____ halves of the AC cycle.

both

A bridge rectifier uses ____ diodes to convert AC to DC.

four

During the negative half-cycle of a bridge rectifier, current flows through ____ to the load.

Diode D

For a full-wave rectifier, the size of the smoothing capacitor needed is half that of a ____ rectifier.

half-wave

The load-line analysis of diode circuits represents all possible (V, I) pairs that satisfy the diode's _ in the circuit.

physics

The voltage drop across a diode in forward bias is typically around ____ volts for silicon diodes.

0.7

In the reverse-bias region, a diode blocks current and allows only a very ____ current to flow backwards.

tiny

Temperature increases cause the forward voltage drop to decrease approximately ____ mV for every degree Celsius rise.

2

An ideal diode in forward bias can be modeled as a voltage source with a constant voltage drop plus an ____ resistance.

ideal

Rectifier circuits change AC to ____ current.

DC

The relationship between voltage (V) and resistance (R) in a linear circuit can be described by ____ law.

Ohm's

A Zener diode maintains a constant output voltage during the breakdown by keeping the voltage across it almost ____ .

constant

When a diode is not conducting, it appears as an ____ circuit.

open

The conduction of a diode during positive half-cycles is described by it being in ____ bias.

forward

A rectified output voltage from a half-wave rectifier only includes the ____ half of the input sine wave.

positive

The average load voltage can be calculated with the peak voltage (Vm), subtracting the diode drop (around 0.7V) resulting in ____.

Vavg

Half-wave rectifiers that charge batteries allow current to flow when the AC voltage is above the battery's ____ .

voltage