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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.
One of the issues with using an RC network to generate a PoR pulse is the sensitivity of the R and C values to the power-supply ramp characteristics. When the power supply ramp is rapid, the R and C values can be calculated so that the time to reach the switching threshold of the Schmitt trigger is enough to apply a long enough reset pulse.
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 ...
Sharp hysteresis loop of a Schmitt trigger. Often, some amount of hysteresis is intentionally added to an electronic circuit to prevent unwanted rapid switching. This and similar techniques are used to compensate for contact bounce in switches, or noise in an electrical signal. A Schmitt trigger is a simple electronic circuit that exhibits this ...
[9] [10] Early latches were known variously as trigger circuits or multivibrators. According to P. L. Lindley, an engineer at the US Jet Propulsion Laboratory , the flip-flop types detailed below (SR, D, T, JK) were first discussed in a 1954 UCLA course on computer design by Montgomery Phister, and then appeared in his book Logical Design of ...
Schmitt trigger three-state 20 SN74LS240: 74x241 8 octal buffer, non-inverting outputs 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
The trigger was a relay device in the switchgears installed by Entergy before the Super Bowl, according to Dr. John A. Palmer, a University of Utah electrical engineering professor and the founder ...
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.