5 ms·

Notes on a Pulse Generator Circuit

37 points by cushychicken 11y ago

deutronium 11y ago
I thought this was pretty damn impressive https://www.reddit.com/r/electronics/comments/3m1bao/13ghz_oscillator/ https://www.reddit.com/r/electronics/comments/3m1bao/13ghz_o... I didn't know you could make a fairly simple oscillator to generate ~1GHz frequency.
- cushychicken 11y ago
  I was super pumped to see that as well. Was cool to see how much of an effect a good power supply had on getting the phase noise under control.
  - deutronium 11y ago
    Oh neat, I hadn't seen the image from the SDR with better regulation, that's really cool!
  - diymaker 11y ago
    You could try this analog circuit sim - http://www.macspice.com http://www.macspice.com
    - cushychicken 11y ago
      Thanks for the recommendation! I gave macspice a try already and really wasn't impressed. LTSpice just has much better GUI support. I know it's a terrible thing to admit on HN, but when it comes to simulation models, a GUI is a really nice thing to have.
cushychicken 11y ago
Pertinent to my comment about LTSpice - I have to give some credit to the folks at CircuitLab for giving me a line on their circuit sim software. Much easier to use than LTSpice, whose GUI is slow to the point of physical pain. I'll see about writing something more coherent about it in the near future. Stay tuned.
- compumike 11y ago
  [CircuitLab developer.] Thanks so much Nash! If anyone reading this wants to give our software a spin, email me your CircuitLab username (mike at circuitlab dot com) in the next day or so and I'll hook you up with 1 year free of CircuitLab Pro.
magnusss 11y ago
Very nice work! One minor edit: It's Horowitz and Hill.
- cushychicken 11y ago
  Duh! I bet Hall is getting a ton of electronics interview requests now. I'm such a jerk. :) Thanks for pointing that out.
nibnib 11y ago
Has the author swapped collectors and emitters in the first paragraph? e: actually several times throughout the text it seems.
- cushychicken 11y ago
  It appears so! D'oh. Thanks for pointing that out. I fixed it.
  - nibnib 11y ago
    Yep, reads much better now.

37 points by cushychicken 11y ago

I thought this was pretty damn impressive https://www.reddit.com/r/electronics/comments/3m1bao/13ghz_oscillator/ https://www.reddit.com/r/electronics/comments/3m1bao/13ghz_o... I didn't know you could make a fairly simple oscillator to generate ~1GHz frequency.

cushychicken 11y ago
I was super pumped to see that as well. Was cool to see how much of an effect a good power supply had on getting the phase noise under control.
- deutronium 11y ago
  Oh neat, I hadn't seen the image from the SDR with better regulation, that's really cool!
- diymaker 11y ago
  You could try this analog circuit sim - http://www.macspice.com http://www.macspice.com
  - cushychicken 11y ago
    Thanks for the recommendation! I gave macspice a try already and really wasn't impressed. LTSpice just has much better GUI support. I know it's a terrible thing to admit on HN, but when it comes to simulation models, a GUI is a really nice thing to have.

cushychicken 11y ago

Pertinent to my comment about LTSpice - I have to give some credit to the folks at CircuitLab for giving me a line on their circuit sim software. Much easier to use than LTSpice, whose GUI is slow to the point of physical pain. I'll see about writing something more coherent about it in the near future. Stay tuned.

compumike 11y ago
[CircuitLab developer.] Thanks so much Nash! If anyone reading this wants to give our software a spin, email me your CircuitLab username (mike at circuitlab dot com) in the next day or so and I'll hook you up with 1 year free of CircuitLab Pro.

magnusss 11y ago

Very nice work! One minor edit: It's Horowitz and Hill.

cushychicken 11y ago
Duh! I bet Hall is getting a ton of electronics interview requests now. I'm such a jerk. :) Thanks for pointing that out.

nibnib 11y ago

Has the author swapped collectors and emitters in the first paragraph? e: actually several times throughout the text it seems.

cushychicken 11y ago
It appears so! D'oh. Thanks for pointing that out. I fixed it.
- nibnib 11y ago
  Yep, reads much better now.