Questions tagged [one-shot]

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Why does adding this low pass-filter to a monostable multivibrator prevent triggering?

A 24 VDC sinking sensor is tied to an SSR. The SSR converts the signal from 24 VDC to 5 VDC. The output of the SSR goes directly to input B of a 74121 One-shot. (The diagram has a resistor and ...
1
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1answer
157 views

Can the output impedance on af op-amp be set to 50 ohm regardless of frequency?

I want to make a circuit with an output impedance of 50 ohms. I am dealing with negative photomultiplier tube pulses that in 50 ohm load look like in the picture below: I want to use the pulses to ...
0
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1answer
76 views

IC 555 as monostable multivibrator

How is the output of a monostable multivibrator affected if the trigger pin is kept at a negative voltage (0V)? The upper voltage reference comparator will change its output to logic 1, while the ...
2
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4answers
4k views

Dual edge detector

I am designing a hobby project that will run on a battery so I am trying to reduce power consumption. The SoC I am using has the ability to go into a deep sleep mode where it consumes very little ...
0
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1answer
223 views

How can I toggle a one shot during the timing cycle?

I need a non-retriggerable one shot circuit (monostable) that will turn off during the timing cycle if a second input/trigger pulse is received. I.e. I wish to have a single momentary switch to start ...
1
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1answer
128 views

Regenerating the Gate of a Gated Pulse Wave

I'm looking for suggestions for alternative solutions to a design problem I have. Basically converting a gated pulse wave back into it's enabling gate. Bottom of the post lists the solutions I've come ...
2
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1answer
989 views

What does the diode in this D flip-flop “One-shot” do?

Does this diode help discharge the capacitor once the flip-flop is reset? Thanks in advanced. (Image was taken from http://educypedia.karadimov.info/library/oneshots.pdf)
0
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1answer
167 views

RF one-shot circuit capable of producing 5-ns pulse [closed]

I am looking for a one-shot circuit capable of producing a 5-ns output pulse with short switching time. I saw this one (http://www.nxp.com/documents/data_sheet/74LV123.pdf) in a previous question, ...
0
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1answer
894 views

Help with using monostable one-shot multivibrator?

Above is the schematic I simulate in LTSpice. The input signal is a 8V pulse train with 100us ON time and 2250us period. The signal is fed as an input to the timer 555(NE555 in LTSPice). I'm trying ...