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Anything related to Schmitt trigger circuits. Schmitt triggers are positive feedback comparator circuits exhibiting hysteresis.

3 votes
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TTL Schmitt trigger vs TTL in relaxation oscillator

Schmitt triggers have hysteresis. Without hysteresis, the inverter will behave more like a linear amplifier. The frequency will be less predictable because it will depend more on the internal characte …
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1 vote

Can't get this schmitt oscillator to work...did I goof somewhere?

Please draw your schematics so they flow left to right as much as possible. I have redrawn the left portion so it is easy to follow. At power-on, all the caps will be discharged, and all the three …
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1 vote

RC circuit and HEX SCHMITT-TRIGGER INVERTERS

Standard TTL inputs do not have a high input impedance, you need to use a much smaller resistor with this IC. Or, use a 74AC14, it has a very high input impedance; you will get the result you want wit …
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7 votes
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Minimizing signal delay when debouncing

If you insist on a H/W solution, a diode will make the charging/discharging of the cap asymmetrical. The delay will be a few microseconds. The recovery time will be a few milliseconds. simulate thi …
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6 votes
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Maximum current drawn by Schmitt-Trigger

Static power with the input at either rail: \$I_{cc} = 10 \mu A\$ If the input is not at the rail (Vcc - 0.6 V is worst case), add: \$\Delta I_{cc} = 500 \mu A\$ If the input is oscillating, you need …
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