Design

Switching power supplies and overcurrent protection
I see three types of overcurrent proctection in SPSs these days - Shutdown, hiccup mode and constant current limiting. Unlike with shutdown and hiccup types, is it correct to assume that voltage is never disconnected from the load, during an overcurrent condition, for CC limiting types? And if so, wouldn't this be ... 6 Dec 2009 16:09

SMD identification: please help!
Hello, I'm asking for help with identification of three sm devices. 1. Q1, marked "I GE": probably N-channel JFET _ 2. D2, marked "A 7": diode or BJT used as a diode <http://www.bilder-hochladen.net/files/12b4-4w-jpg.html> _ 3. Q2, marked "M 5": probably PNP BJT <http://www.b... 4 Dec 2009 16:17

MOSFET transient dissipation
For the drag race Christmas tree project I opened for discussion several days ago, I intend to use IRFZ44N MOSFETs to switch car headlight bulbs. The MOSFET has an ON resistance of 17.5m? (say 25m? warm). The lamps are 12V/45W used in small cars and should be just enough to get the transistors slightly warm to ... 6 Dec 2009 13:56

Voltage controlled high current source problem with low valuesense resistor
Steve wrote: I've put together a voltage controlled current source for use at high currents (5 Amps) based on the desgin at http://www.daycounter.com/Circuits/Current-Servo/Current-Servo.phtml It uses a single supply op amp (OPA340 or OPA703) driving a low gate threshold logic level MOSFET (RFP30N06LE). ... 3 Dec 2009 07:02

Advanced Circuits 4PCB
Ok, I know I've asked these questions a thousand times but heres the final one(as I'm ready to send off for fab). I have an approximately 20x2.5 pcb(actually 19.5x2.3). It is non-rectanular(sorta tapers) and consists of 2 layers with about 350 10mil(hole) vias. It has a total of 222 components. About 20 IC's i... 3 Dec 2009 11:29

Solutions Manual
Hi Dear Students; I have the comprehensive Solution Manual for all of the following textbooks for most of them in electronic format PDF fomat. The solutions manual are comprehensive with answers to both even & odd problems in the text. The methods of payment is through PAYPAL (It is easy, safe, and you can use de... 1 Dec 2009 15:02

WHO IS MUHAMMAD
I believe that my topic is useful and I would like to share my thoughts. THANK YOU. WHO IS MUHAMMAD? Muhammad was born in Makkah in the year 570, at a time when Christianity was not yet fully established in Europe. Since his father died before his birth, and his mother shortly afterwards, he was raised by his ... 7 Dec 2009 16:15

Piezo Amplifier
Hello to everybody! It is the first time I write here and I apoligize for my poor english. I am working on an amplifier for driving piezo stacks and I need a sinusoidal voltage of 500 V peak with mean value of 500 V. To keep things "quite simple" I'll work at slow frequencies, so that the current in the stack (c... 11 Dec 2009 13:36

Would magn. pole reversal actually mess up electronic equipment?
Hi this has perhaps been asked before(?) Apologies in that case. What I wanted to ask is, if earths magnetic pole now would manage to flip in a really quick timespan (let's say less than 5 minutes), would that have any effect on electronic equipment, and if so, why? I mean I would think that the would not... 18 Jan 2010 22:09

Integrated AGC 100kHz-10MHz
I have a signal between 100kHz to 10MHz sinusoidal DAC output. The signal starts out at 650mVpp low frequency with a small DC offset of about 10mV. As the frequency increases the DC offset increases and the pk-pk voltage decreases. At 10 MHz my signal pk-pk has deteriorated to about 100mVpp with about 500mV DC offs... 4 Dec 2009 19:38