Recent content by totota

The PSUs are HP common slot, the ones used in servers. The tests I was planning on doing where regulation with load (which should be within 5% for atx) and ripple (120 mVpp for atx). Regarding inrush current (100 ms max?), I couldn't find the time needed for the overcurrent protection to...

Thanks everyone for replying. I will use automobile headlamps, then.

Hi. I have to test a couple PSUs (ripple, regulation, etc.) that are rated 12 V 62.5 A. In order to do so, I need a test load; I was thinking about using nine 2 ohm 100 W 5% resistors (about 3 usd) in parallel (giving 0.22 ohm 900 w). Taking into account the tolerance of the resistors, I get a...

Thanks, will look into that. Now I got it, thanks! You are right, I had some troubles with the sign of IB1; and it should be VE1 in my equation, not VB1. ##V_{E1}=I_{C1}/β_{1}.(R_2+R_3)-V_{BE1}=839.29 μA/325 . (22 kΩ+1 kΩ)-0.66 V=-0.60 V##In my last post I forgot to upload one simulation...

First of all, thanks for replying! I've attached the results of the simulation that I ran. For the differential amplifier I found the following (which more or less matches the simulation): ##I_{C1}=V_{EB4} /R_6=0.47 V/560 Ω=839.29 μA## ##I_{C2}=I_1-I_{C1}=1.54 mA## ##V_{B4}=V_{CC}-V_{EB4}=35...

Hi. I'm trying to analyse an audio amplifier circuit (DC, frequency response, stability, etc.). I began with the DC bias analysis but I'm having troubles finding where to start. I've attached the full circuit and a DC simplified version. I've placed an 8 ohm resistor as the load (8 ohm...