Enhancement mode MOSFET: This type of MOSFET is turned on when a positive voltage is applied to the gate. It is commonly used as a switch in electronic circuits.
Depletion mode MOSFET: This type of MOSFET is turned on when a negative voltage is applied to the gate. It is commonly used in circuits that require a variable resistor.
n-channel MOSFET: This type of MOSFET uses an n-type semiconductor material, which means that it has an excess of electrons. It is commonly used in high-speed switching applications.
p-channel MOSFET: This type of MOSFET uses a p-type semiconductor material, which means that it has a deficiency of electrons. It is commonly used in low-power switching applications.
JFET (junction field-effect transistor): This type of MOSFET uses a pn junction to control the flow of electrons, rather than a metal-oxide gate. It is commonly used in low-power and low-frequency applications.
MOSFET amplifier: This type of MOSFET uses multiple transistors to amplify an input signal. It is commonly used in audio and radio frequency (RF) circuits.
Enhancement mode MOSFET: This type of MOSFET is turned on when a positive voltage is applied to the gate. It is commonly used as a switch in electronic circuits.
Depletion mode MOSFET: This type of MOSFET is turned on when a negative voltage is applied to the gate. It is commonly used in circuits that require a variable resistor.
n-channel MOSFET: This type of MOSFET uses an n-type semiconductor material, which means that it has an excess of electrons. It is commonly used in high-speed switching applications.
p-channel MOSFET: This type of MOSFET uses a p-type semiconductor material, which means that it has a deficiency of electrons. It is commonly used in low-power switching applications.
JFET (junction field-effect transistor): This type of MOSFET uses a pn junction to control the flow of electrons, rather than a metal-oxide gate. It is commonly used in low-power and low-frequency applications.
MOSFET amplifier: This type of MOSFET uses multiple transistors to amplify an input signal. It is commonly used in audio and radio frequency (RF) circuits.
Telegram and Signal Havens for Right-Wing Extremists
Since the violent storming of Capitol Hill and subsequent ban of former U.S. President Donald Trump from Facebook and Twitter, the removal of Parler from Amazon’s servers, and the de-platforming of incendiary right-wing content, messaging services Telegram and Signal have seen a deluge of new users. In January alone, Telegram reported 90 million new accounts. Its founder, Pavel Durov, described this as “the largest digital migration in human history.” Signal reportedly doubled its user base to 40 million people and became the most downloaded app in 70 countries. The two services rely on encryption to protect the privacy of user communication, which has made them popular with protesters seeking to conceal their identities against repressive governments in places like Belarus, Hong Kong, and Iran. But the same encryption technology has also made them a favored communication tool for criminals and terrorist groups, including al Qaeda and the Islamic State.
For some time, Mr. Durov and a few dozen staffers had no fixed headquarters, but rather traveled the world, setting up shop in one city after another, he told the Journal in 2016. The company now has its operational base in Dubai, though it says it doesn’t keep servers there.Mr. Durov maintains a yearslong friendship from his VK days with actor and tech investor Jared Leto, with whom he shares an ascetic lifestyle that eschews meat and alcohol.
