zener
They are frequently used to provide a voltage reference in voltage regulators.
A thyristor, also known as a silicon controlled rectifier, is a diode that can be turned on by application of a small gate voltage.
a device that conducts in only one direction
because two semiconductors are there.....P and N
Different applications of diode include:Rectification of voltageswitching circuitsclamping applicationsvoltage reference (zener Diode)phase lock loop/FFLinfrared applicationssignal amplifierssensorshigh frequency micro-wave oscillators.
Zener diode can be defined as diode which allows current to flow in the forward direction in the same method as an ideal diode, but will also allow it to flow in reverse direction when the voltage is above definite value known as the breakdown voltage
A diode clamp, also often called simply a clamper, works by limiting electric current to a single direction and stops the signal from going beyond the reference. They can be either positive or negative, and biased or unbiased.
A thin junction diode which exhibits negative resistance under low forward bias condition is known as tunnel diode.
A thin junction diode which exhibits negative resistance under low forward bias condition is known as tunnel diode.
A Zener diode is a type of diode that sends current in the forward way like a normal diode, but also in the reverse direction if there is voltage that is larger than the breakdown voltage which is also known as "Zener voltage". The apparatus was named after Clarence Zener, who discovered this electrical property.
The symbol for the esaki diode, also known as the tunnel diode, is similar to the zener diode, except that the two stems on the end of the cathode both point back towards the anode, and they are at 90 degrees instead of 45 degrees. For more information, and a picture, please see the related link below.
I think you you are asking about varactor diode. varactor means variable capacitor. varactor diode is a p-n junction diode which provide a capacitance across it subjected to applied forward and reverse bias. means it provide variable capacitance which depends on the applied reverse voltage(mostly varactor diode works on reverse voltage).They are also known as varicap