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The Schmitt trigger was invented by American scientist Otto H. Schmitt in 1934 while he was a graduate student, [1] later described in his doctoral dissertation (1937) as a thermionic trigger. [2] It was a direct result of Schmitt's study of the neural impulse propagation in squid nerves.
The following is a list of CMOS 4000-series digital logic integrated circuits.In 1968, the original 4000-series was introduced by RCA.Although more recent parts are considerably faster, the 4000 devices operate over a wide power supply range (3V to 18V recommended range for "B" series) and are well suited to unregulated battery powered applications and interfacing with sensitive analogue ...
Schmitt trigger three-state 20 SN74LS241: 74x242 4 quad bus transceiver, inverting outputs Schmitt trigger three-state 14 SN74LS242: 74x243 4 quad bus transceiver, non-inverting outputs Schmitt trigger three-state 14 SN74LS243: 74x244 8 octal buffer, non-inverting outputs Schmitt trigger three-state 20 SN74LS244: 74x245 8
This centered signal is connected to both the trigger and threshold input pins of the timer. The input signal must be strong enough to excite the trigger levels of the comparators to exceed the lower 1 ⁄ 3 V CC and upper 2 ⁄ 3 V CC thresholds in order to cause them to change state, thus providing the Schmitt trigger feature. [27]
A very early CD4029A counter IC, in 16-pin ceramic dual in-line package (DIP-16), manufactured by RCA Colorized IC die and schematics of CD4011BE NAND gateThe 4000 series was introduced as the CD4000 COS/MOS series in 1968 by RCA [1] as a lower power and more versatile alternative to the 7400 series of transistor-transistor logic (TTL) chips.
Schmitt trigger implemented by a non-inverting comparator. Another typical configuration of op amps is with positive feedback, which takes a fraction of the output signal back to the non-inverting input. An important application of positive feedback is the comparator with hysteresis, the Schmitt trigger.
A Triggering device is an electronic circuit, such as a Schmitt trigger, which is used to control another electronic circuit. Uses In many of industrial operations ...
Today, surface-mounted CMOS versions of the 7400 series are used in various applications in electronics and for glue logic in computers and industrial electronics. The original through-hole devices in dual in-line packages (DIP/DIL) were the mainstay of the industry for many decades.