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A heterojunction bipolar transistor (HBT) is a type of bipolar junction transistor (BJT) that uses different semiconductor materials for the emitter and base regions, creating a heterojunction. The HBT improves on the BJT in that it can handle signals of very high frequencies, up to several hundred GHz .
The TR-1 is a superheterodyne receiver [2] [11] with four n-p-n germanium transistors and one diode. It contains a single transistor converter stage, followed by two intermediate-frequency amplifier stages. After detection, a single-transistor stage amplifies the audio frequency. All amplifier stages use common emitter amplifiers. Stages are ...
Transistor–transistor logic (TTL) is a logic family built from bipolar junction transistors.Its name signifies that transistors perform both the logic function (the first "transistor") and the amplifying function (the second "transistor"), as opposed to earlier resistor–transistor logic (RTL) and diode–transistor logic (DTL).
The introduction of the transistor is often considered one of the most important inventions in history. [1] [2] Transistors are broadly classified into two categories: bipolar junction transistor (BJT) and field-effect transistor (FET). [3] The principle of a field-effect transistor was proposed by Julius Edgar Lilienfeld in 1925. [4]
Radiolab is a radio program broadcast on public radio stations in the United States and through a podcast available internationally, both produced by WNYC.Hosted by Latif Nasser and Lulu Miller, each episode delves into scientific and philosophical topics through stories, interviews, and thought experiments.
A second season, Free! - Eternal Summer, aired 13 episodes between July 2 and September 24, 2014 and was simulcast by Crunchyroll and Funimation. [2] An original video animation episode was included with the seventh Blu-ray Disc and DVD volume released on March 18, 2015. [3] A third season, Free! - Dive to the Future, premiered on July 11, 2018 ...
Sisters with Transistors is a 2020 American documentary film directed by Lisa Rovner in her directorial debut. [ 1 ] [ 2 ] [ 3 ] It premiered at the 2020 South by Southwest Film Festival and was later screened at AFI Fest .
Set in an indeterminate year in the future, 97 years after a nuclear apocalypse has devastated the surface of Earth, all known humans are residents of merged orbiting space stations known as the "Ark". 100 juvenile delinquents are sent to Earth's surface to test its habitability, having been given vitals-monitoring wristbands and instructions to proceed directly to Mount Weather.