I know im 6 years late. But my god, these are so helpful and provide insight missing in analog design books. PLEEEASSSSEEEE MAKKKKKEEEEEE MOOOREEEEEEEEE!!!!!!
Why does this channel have such low subscription number? Aaa because yt doesn't take into consideration quality but only quantity nowadays. Man really appreciate your efforts here, great quality! Please keep it up. I know I'm late for your videos.
Interesting! So they used the circuit with the instrumentation amplifier to eliminate the deviation of each transistor and just measure delta Vbe. Very clever!
Absolutely amazing to me that you understood so exactly what was going on with this circuit; I have to ask: where did you pick up this circuit knowledge (on a single small circuit, like this). I have a B.S.E.E. from the 80's, and nowhere in that formal education would I have picked up so much knowledge about a circuit like this.
9 лет назад
Very good video. This morning I was looking into using 2-diode to220 device for a temperature control circuit. You just save a fair amount of research. 1e3 Thanks.
+Álvaro M. Valdebenito B. Glad it helped! There is a list of excellent references and additional reading in the associated blog post (see link in the video description) if you want more in-depth information on the subject.
Hi there ! Great research about this schematic ! I wonder if the use of two transistors in current mode isn't also related to the TCR compensation of the resistors. When using only one transistor the collector current will also vary as the resistor heats up. Maybe using two of those preserves the currents ratios across temperature ?
Very nice and simple mathematical explanation ! I wonder how Jim figured this out, as I'm sure he wasn't really into solving things numerically... great video.
+weed2luke Thanks! AFAIK, Jim Williams didn't come up with this, it's actually a well known "trick" used in band gap voltage reference circuits. IIRC, Bob Widlar pioneered a lot of this stuff, and Paul Brokaw's work is very well documented (he wrote a book and did a ~1 hour video on the subject, both very informative!).
Can share the multimeter link or part number? Quite impressive!! Recently I worked on DC to DC buck converter but while turing OFF negative spike is there. It is causing problem for micro controller. If you interested to help me out I will share the design details and waveform also.
Thanks for the video, all good :) I think you shall record your data and show them with the help of R language + ggplot2. You can even do linear regression based on your measurements. If you like manipulate data and statistics, R if for you, ggplot2 just render them even better cran.r-project.org/doc/manuals/r-release/R-intro.pdf is a good start point.
+np Yes, pretty graphs might be a bit easier to read. :) I've never used R before, is there an advantage to using R+ggplot2 over a Python based solution (e.g., Python+pyqtgraph)?
+devttys0 That depend what you need, want to do, R is more likely Mathlab or Octave. Python + pyqtgraph should be enough if you want just for graph your dataset. In R it's pretty easy to use/plot without known so much about programming, R is data manipulation centric, python is more generalist programming language.
Can share the multimeter link or part number? Quite impressive!! Recently I worked on DC to DC buck converter but while turing OFF negative spike is there. It is causing problem for micro controller. If you interested to help me out I will share the design details and waveform also.
