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Everything posted by sundin13
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Oh yeah series circuit basics. Ooops...So the other voltage drop would be 33.3 Vdc. Now the smallest the Resistor value before turn off would be 33.3 divided by .006 5550 Ohms......Am I right? Resistor tolerences are not factored in. Thanks Audioguru
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Hey I'm a ;Dtech student in need of some help. A 34V dc supply is applied to an SCR in series with a resistor, R. When the SCR is turned on, its Ih= 6mA, and V a-k= 0.7 V. What is the minimum value of R before the SCR can turn off? Rmin=_______ohms rounded to the nearest hole number. Do I just divided 34V by 0.006 Amps or would that be the Max value... Confused??? Any help would be great...
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I've got it figure out. The Q was throwing me off. As far as I know the Q-point is on the dc load line if I'm not mistaken. This stuff doesn't get any easier thats for sure.
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Well it didn't take me long to get stumped again. The only formulas I have for ICQ & VCEQ need a VBB. With this circuit there is no VBB, am I right? Any help would be great. We're not using any curve charts or data sheets, just formulas, which are not in my text book. Q is queiscent. ??? Determine: a.) ICQ (in mA) (Without using Vb= VccxR2/(R1+R2)) <---voltage divider b.) VCEQ (in Volts) Regards.... :D
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The closest I've been to Sweden is IKEA. I'm from Ontario. First year Tech student with out a clue whats going on in Electronics class! I'm looking for all the help I can get. It turns that I just left out the Vbe. I've fixed the diagram. So now because there is no current through Rb -> Vce = VCC approx.... I'm still thinking about the next two parts. I'll check back tommorrow after some more reading. Thanks everyone for the help so far. ;D
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Thanks guys. And Yeah we use 0.7 V (silicon) for Vbe Oops sory :-\
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This is my first post here so go easy on me. I'm a electrical tech student who is just starting out. I'm stumped on this question... For the circuit shown, Vcc = 14 V, BetaDC = 162, and Rc = 543 Ohms a) Vce (in Volts) when Vin = 0 V b) the min value of Ib (in uA) required to saturate the transistor assuming Vce(sat) = 0 V c) the max value of Rb (in kohms) for saturation operation if V in = 2.9 V I'm not asking for anyone to do my home work here I just need some feedback so that I can wrap my head around this stuff so one day I can be answering these types of question with ease. Thanks in advance.. ;D