Forums

ADC limitations for bandpass/IF sampling

Started by clam December 13, 2005
Peter K. wrote:

> Al Clark <dsp@danvillesignal.com> writes: > > >>I still call powering up a circuit the first time, the smoke test. >> >>Its been a long time since one actually smoked (they don't always work, >>but they tend to be a lot more benign). > > > When I was tutoring 1st year engineering labs, by far the biggest > mistake students had made when they said "it doesn't work" was to > leave the power supply off. > > I _know_ it's bad, but I used to shout <BANG> when they turned the > power supply on. :-) > > And nine times out of ten, everything worked. There were just two > times I remember anything "letting the smoke out". Once it was an > electrolytic capacitor that went <BANG> and the other time the > students got some diodes to glow faintly red... and they we'ren't > SUPPOSED to be LEDs. > > Ciao, > > Peter K.
I had a coworker for a while who could make a perfect 120-cycle buzz, loudly, just like a piece of power electronics about to go up in smoke. I think if we hadn't been doing stuff that was all DC we would have dragged him out and shot him... -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Hello Tim,

> I had a coworker for a while who could make a perfect 120-cycle buzz, > loudly, just like a piece of power electronics about to go up in smoke. > > I think if we hadn't been doing stuff that was all DC we would have > dragged him out and shot him... >
This was from the days when smoking was still allowed in labs: Engineer drinks coffee. Nature calls. While engineer is at the ceramics department someone shoves a screw cap with a not-quite-extinguished butt under the prototype. Engineer comes back. Smoke billowing out of prototype. Engineer panics and rips all supplies off. Regards, Joerg http://www.analogconsultants.com