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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.
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
A Schmitt trigger may be used to deassert the reset signal cleanly, once the rising voltage of the RC network passes the threshold voltage of the Schmitt trigger. The resistor and capacitor values should be determined so that the charging of the RC network takes long enough that the supply voltage will have stabilised by the time the threshold ...
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 ...
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 ...
By using an RC network to add slow negative feedback to the inverting Schmitt trigger, a relaxation oscillator is formed. The feedback through the RC network causes the Schmitt trigger output to oscillate in an endless symmetric square wave (i.e., the Schmitt trigger in this configuration is an astable multivibrator).
Schmitt also coined the term biomimetics and invented or co-invented the Schmitt trigger, the differential amplifier, and the chopper-stabilized amplifier. [1] He was elected in 1953 a Fellow of the American Physical Society. [2] He was awarded the John Price Wetherill Medal in 1972.
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]