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Possibly an elementary physics question...
Given a wire with current i running through it, we can find the magnetic field B at some distance r away from the center of the wire. What I'm wondering is, if I have a permanent magnet some distance r away from the wire, how would I find what the...
For a research project, I would like to set up a network of cameras for the purpose of tracking a person's movement across a floor on a building. Because there are different rooms on that floor (it's not a single open space), my thinking is you'll need to use two cameras per room in a stereo...
Re: Dummy capacitors
From the comments I've been getting, I gather that people are confused about why my caps as shown aren't matched. So I'll explain the background to the layout.
The capacitors belong to a RC oscillator circuit with bit trimming, and the idea is to use trimming to...
Re: Dummy capacitors
I know that already. My question is HOW should I arrange dummy caps given the configuration of caps I have drawn in my attachment? I don't understand what you mean by cap performance when my primary concern is for cap matching.
Maybe I should be more specific: Several of...
This is going to be a novice layout question, but I'm not sure how to construct dummy caps around a set of caps that I've drawn for a circuit. I've attached a JPEG screenshot of the caps in my layout in this post. These are poly-poly caps. Specifically, I'm interested in those caps that share...
Hi,
I'd like to try to learn about microcontroller programming and maybe do a few hobby projects on my own time, but I'm not sure what model is good as a beginning. Can someone suggest some microcontrollers that I can purchase that are relatively cheap and that I can pick up in a reasonable...
I'm trying to add an additional voltage output to a bandgap reference to output a PTAT voltage referenced to GND that can provide information on the temperature of the circuit. In other words, to provide a voltage whose slope = voltage/degree C. This output voltage will will need to be both Vdd...
74hc14 ring oscilator
No, I never knew that. I'm guessing the book probably referenced the 74HC14 design or a paper that detailed such a design that Fairchild then used.
In any case, I was trying NOT to do an RC oscillator, due to issues with resistor performance over temperature (they're...
74hc14 oscillator crystal
Sure. The figures are actually online on the book's website. Here's the link:
**broken link removed**
The figures I'm speaking off are Figure 18.3 (Schematic of the Schmitt Trigger) and Figure 18.8 (the Schmitt Trigger as an oscillator). The design draws a lot of...
low current design pdf
Hi. Thanks to everyone who have answered so far.
One of the ideas that I'm playing around with is using a Schmitt trigger as basis for an oscillator. For those of you who have the Baker-Lee textbook, take a look at the chapter on "Special-Purpose Digital Circuits" where...
oscillator cd4007
I originally posted a question here. **broken link removed**
That question was asked in relation to a project I'm doing that requires breadboarding. As it turns out, I also need a clock generating circuit for a different, ASIC design project I'm doing. Because this time I'm...
I'll keep in mind the tips just given.
Unfortunately, I can't post the exact circuit due to it being a research project, so it is not material I can post online. I'll try to post something similar though if I have time so I have something more concrete to ask.
Thanks for the replies.
EDIT: I...
t-spice+example
With T-Spice, I am having trouble doing dc sweeps because non-convergence of data keeps happening. So I get errors such as:
"Conventional DC operating point computation failed.
Gmin stepping failed
Final gmin value = 1e-008"
and etc. etc.. I imagine the errors are happening...
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