New component: Edge triggered pulse generator (Trig2pulse)

[lpoma]

I created a edge triggered pulse generator call Trig2pulse using only symbol and subckt definitions. (ie. No C-block was used).

It can take a digital-like input signal to trigger a user-specified output pulse on a rising edge (Trig2pulse.qsym) or a falling edge (_Trig2pusle.qsym).

Here are the relevant files needed:

• Rising edge Trigger Pulse Generator symbol: Trig2pulse.qsym (1.3 KB)
• Falling edge Trigger Pulse Generator symbol: _Trig2pulse.qsym (1.4 KB)
• Component Documentation: Trig2pulse(V1.0).pdf (426.9 KB)
• Example Schematic: Trig2pulse.qsch (6.0 KB)

Comments are welcomed.

Len

[KSKelvin]

This is expected to be .qsym (symbol) but you put a schematic. You can edit your post to upload correct file.

@lpoma

Rising edge Trigger Pulse Generator symbol: Trig2pulse.qsch (6.0 KB)

Very clever and simple way in generating a one shot. Here I modify the trigger logic to include logic reference trigger level.

Trig2pulse(mod).qsym (1.4 KB)
compare.Trig2pulse.qsch (7.8 KB)

[lpoma]

@KSKelvin ,

@KSKelvin

This is expected to be .qsym (symbol) but you put a schematic. You can edit your post to upload correct file.

Thank you. you are correct. I changed the rising edge symbol.

Your suggestion is a good one. I was trying to minimize the input parameter list.

Your suggestion of the Ref param is one of the mods that people can make.

I thought this component is a good example of how to “trick out” QSpice. I figured my efforts are a good starting point for other future ideas.

There is more to QSpice that meets the eye (or brain). Mike has done a great job to make QSpice flexible.

Len

[KSKelvin]

@lpoma

I was trying to minimize the input parameter list.

There is a trick in symbol creation. In Symbol Properties, right-click on the attribute and make it invisible. This can keep your symbol clear while maintaining the flexibility of controlling the circuit.