Questions tagged [schmitt-trigger]
Anything related to Schmitt trigger circuits. Schmitt triggers are positive feedback comparator circuits exhibiting hysteresis.
276
questions
1
vote
3
answers
187
views
SPI device stops working when integrating Schmitt triggers and ESD diodes
I am integrating a BME680 temperature, pressure and humidity sensor using SPI.
When I only use 33 Ohms series resistors, the system works fine. However, when adding Schmitt triggers (NL27WZ17DFT2G), ...
- 179
1
vote
1
answer
60
views
Issues with switch debouncing
I am having some issues with debouncing a switch with an RC filter and 74HC14 Schmitt-trigger inverter IC. I am using a standard circuit that is linked in the datasheet. The circuit in question here ...
0
votes
1
answer
77
views
What is the appropriate VCC to apply to a Schmitt trigger?
I would like to transport a SPI signal over 1 meter, at a 10 MHz clock rate, with each SPI wire twisted with a ground wire, no differential signal, 33 Ohms terminations, ESD protection with chip ...
- 179
3
votes
3
answers
949
views
Why is a Schmitt trigger useful for SPI?
I understand Schmitt triggers are a great way to convert a floating or noisy signal to either HIGH or LOW depending on a threshold. It is mentioned in other threads that a Schmitt trigger can help ...
- 179
0
votes
3
answers
76
views
Adding reference voltage to oscillator
I have designed a very basic Schmitt Trigger LFO. However, the power supply for the op amp has to be 9 and 0 V instead of 9 and -9V. For doing so, i supose that i need to add some voltage reference ...
- 89
2
votes
1
answer
104
views
In the following circuit, do T1 and T2 conduct or block when the circuit is in the LOW or HIGH state?
This circuit is a Schmitt trigger, and the supply voltage Ucc.
is 15V. I want to calculate whether the transistors T1 and T2 are conducting or not when the state is LOW or HIGH(U(A)). These ...
- 31
1
vote
2
answers
197
views
Why is this not working as a Schmitt trigger?
I've been trying to implement a Schmitt trigger using comparators in LTspice. Needless to say, even though I can work with opamps and comparators, I'm totally at lost with using them to make Schmitt ...
- 409
1
vote
1
answer
61
views
Time period of V1 and V2 signal the integrator and schmitt trigger
Hello I have tried to solve this circuit several times and i cant figure out what i did wrong.
You guys give me some tips.
This is circuit with 2 op amp (2 stages) first one is schmitt trigger and the ...
- 63
0
votes
0
answers
38
views
Controlling logic gate and dead time for H-bridge MOSFETs
I intend to make an H-bridge driver for a 36v DC motor that can control with 3 MCU pins (Enable, PWM, Direction), Regarding my research, there are three options to drive the H MOSFETs; One using the ...
- 343
1
vote
0
answers
64
views
Help me make this switching transistor circuit is right
I'd like some insight to make sure my circuit's design is at its best. At the moment the circuit is working, but since this is my first time designing a circuit from scratch with transistors, I ...
- 13
0
votes
2
answers
121
views
LM318 strange oscillations
I want to make a 100~200 kHz square wave signal. I tried with a Schmitt trigger oscillator . The circuit below worked well with another op amp but the slew rate was too low so a tried with the LM318 ...
- 3
4
votes
4
answers
865
views
Op-amp with Schottky diode
I'm struggling to understand what the sense is of using the two Schottky diodes in this excerpt of a circuit:
I understand how a Schmitt trigger works. The diodes ensure that the voltage difference ...
- 149
1
vote
1
answer
109
views
Schmitt trigger using CMOS inverters [duplicate]
How does this circuit exactly work?
Source: Problem 8.14, Introduction To Digital Microelectronic Circuits by K. Gopal Gopalan
- 161
0
votes
1
answer
84
views
How do I derive the frequency of an LFO circuit?
I'm attempting to solve why the frequency of an LFO, which is a Schmitt Trigger - Integrator LFO, seems to be about 7.13 Hz even when the reverse logarithmic potentiometer is set to its lowest setting....
0
votes
0
answers
140
views
How fast can a Schmitt trigger operate? Can I use it for signal conditioning digital serial data?
I would like to know if I could use a Schmitt trigger chip (e.g., 74HCT14, CD40106B and 74AC14) to clean a 12MHz serial digital signal that has gone through a long cable and will pass through multiple ...
- 423