> I figured I'd ask this in public since it might be of general interest > to know the answer. Also, I don't mind asking dumb questions in > public. I hope I am not putting you on the spot, DJ!
No problem ;-) > I noticed that on p. 3, the ST part (U300) has PVDD and PVSS > connections through 4.7 ohm resistors to PWR and GND, respectively. I > can see using a small resistor + shunt cap to GND in series with the > power connection to attenuate power supply noise. However, why is the > PVSS connection to GND also going through a resistor? There's noise on both power and ground lines. The P* pins are for the PLL's power supply, which need as clean a power source as you can provide. > I guess I could look at the part's datasheet, but the resolution of > the PNG file isn't good enough for me to resolve the part no. (Or > maybe my computer's screen doesn't offer enough resolution.....) Click on the text link, which links to the *.sch directly. The mp3 chip is an STA013 dsp chip. _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user