Interesting PI circuit, direct sample

[6666]

While looking for something else in google, this PI circuit popped up, looks to be direct sampling the coil signal.

[kt315]

student work. this guy must buy ITMD before to draw something.

[KingJL]

While looking for something else in google, this PI circuit popped up, looks to be direct sampling the coil signal.

Actually it is a TX circuit that uses a positive 0 to 3 V input signal to drive a -12 V TX circuit. It demonstrates level shifting of the drive signal to Q1!

[Tim]

KingJL or others, could you elaborate on any advantages of this design ??

[Carl-NC]

Once you correct Q3 & Q4 (they are upside-down) it's about the same as using bipolars. Q4 is a level translator and Q2/Q3 form a gate driver. In the past, I've used a class-B bipolar gate driver but now I tend to use a SPDT CMOS switch, like a 4053. They can be driven directly from 3V logic.

[KingJL]

... but now I tend to use a SPDT CMOS switch, like a 4053. They can be driven directly from 3V logic.

Dave J rubbing off on ya'?!

[Carl-NC]

Heh a little bit.

[kt315]

KingJL or others, could you elaborate on any advantages of this design ??

just Dave J could. he does those things.

[dbanner]

I saw a series of MOSFET being driven by 4000series CMOS from digital source somewhere. I also saw 1ghz 74series logic. Yes, 1ghz.

[6666]

While looking for something else in google, this PI circuit popped up, looks to be direct sampling the coil signal.

Thats an interesting idea using a 4053 as a driver rather than a bjt totem pole, not much shows up in google about it.

For ME what I found interesting was the words pin 4 and pin5, I took this to possibly mean that they were micro pins, and if so was the output being direct sampled ?.
and was the signal without an amp large enough to direct sample.

I wasn't really interested in the push pull driver and was going to erase it from the drawing before I posted it but ran out of time and just posted it whole.
Being curious I tacked on R2-R5 and C1 on to a simple spice PI sim, and I was surprised at how large the output signal was in the sim

[Eddy71]

Hire full project:

http://www.instructables.com/id/Puls...With-GreenPAK/

https://www.google.com/url?sa=t&rct=...-srL66SHm2_3uz

[6666]

Hire full project:

http://www.instructables.com/id/Puls...With-GreenPAK/

https://www.google.com/url?sa=t&rct=...-srL66SHm2_3uz

Thanks Eddy I will have a read and see what it is all about