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  2. Regenerative circuit - Wikipedia

    en.wikipedia.org/wiki/Regenerative_circuit

    One example is the Schmitt trigger (which is also known as a regenerative comparator), but the most common use of the term is in RF amplifiers, and especially regenerative receivers, to greatly increase the gain of a single amplifier stage.

  3. Communication during the September 11 attacks - Wikipedia

    en.wikipedia.org/wiki/Communication_during_the...

    After the 1993 World Trade Center bombing, radio repeaters for New York City Fire Department communication were installed in the tower complex. Because they were unaware that several controls needed to be operated to fully activate the repeater system, fire chiefs at their command post in the lobby of the North Tower thought the repeater was not functioning and did not use it, though it did ...

  4. World Trade Center (1973–2001) - Wikipedia

    en.wikipedia.org/wiki/World_Trade_Center_(1973...

    The World Trade Center seen from a nearby street in 2000. The original World Trade Center created a superblock that cut through the area's street grid, isolating the complex from the rest of the community. [91] [247] [248] The Port Authority had demolished several streets to make way for the towers within the World Trade Center. The project ...

  5. List of World Trade Centers - Wikipedia

    en.wikipedia.org/wiki/List_of_World_Trade_Centers

    A World Trade Center (also World Trade Centre or WTC) is a building or complex of buildings used for the promotion and expansion of trade and licensed to use the "World Trade Center" name by the World Trade Centers Association (WTCA). As of May 2020, the WTCA included 323 properties in 90 countries. [1]

  6. Repeater insertion - Wikipedia

    en.wikipedia.org/wiki/Repeater_insertion

    An active circuit used for such a purpose is known as a repeater. In a CMOS integrated circuit, the repeater is often a simple inverter. Reducing the delay of a wire by cutting it in half and inserting a repeater is known as repeater insertion. The cost of this procedure is the additional new delay through the repeater itself, plus power cost ...

  7. World Trade Center (2001–present) - Wikipedia

    en.wikipedia.org/wiki/World_Trade_Center_(2001...

    The new World Trade Center complex also includes a museum and memorial, and a transportation hub building that is similar in size to Grand Central Terminal. 7 World Trade Center, which was not included in the site's master plan, opened on May 23, 2006, making it the first of the skyscrapers to have been completed in the World Trade Center ...

  8. Radio masts and towers - Wikipedia

    en.wikipedia.org/wiki/Radio_masts_and_towers

    The North Tower of the original World Trade Center also had a 110-metre (360 ft) telecommunications antenna atop its roof, constructed in 1978–1979, and began transmission in 1980. When the buildings collapsed, several local TV and radio stations were knocked off the air until backup transmitters could be put into service. [ 13 ]

  9. Construction of the World Trade Center - Wikipedia

    en.wikipedia.org/wiki/Construction_of_the_World...

    The World Trade Center was built on the site of Manhattan's Radio Row (pictured). The site for the World Trade Center was the location of Radio Row, which was home to 323 commercial or industrial tenants, over one thousand offices, many small businesses, and approximately 100 residents.