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50 Threads found on Bjt Pdf
Hi guys, I need help identifying some TO-92 components. I asked for some BSS138 or 2N7000 mosfets at a local component shop yesterday, What i received was this: 136769 136770 - TO-92 package - front is painted in metallic blue - center leg is offset to back - markings are: SS3
Hello guys, I need some help with transistors. I need to find an addecuate model for my application. It has to be cheap and wide available (I mean, if it can be a well known model (such as 2n3904 for general use) it would be better. What I am looking for is fast transistors. I don't need UHF transistors but what I am working on is in that u
Page 4 of the LT3692 datasheet states that the current from the boost circuit to each of the high side bjt drives is 55mA. Do you know what current the low side bjts draw? LT3692 datasheet:- Also, page 2 of the LT3692 datasheet also says that Theta (JA) is 35degC/Watt?.but do you know wha
G'day Folks, In a current application a TPM411 remote temperature sensor IC is used. The IC measures the Vt of a bjt to determine temperature. The requirement is for a small (3mm) probe and given the better range of small leaded diode packages available, probe construction can be simplified
Equation 25, Page 14 of App Note AN-57 gives the small signal transfer function for the error amplifier and modulator of a topswitch-jx based flyback. (this means the error amplifier circuit of fig23 of page 14 of AN-57)?.. AN-57 We wish to modify it by having a bjt to ampl
The datasheet of a switching bjt from NXP: PMBT2369 mentions collector-base break down voltage = 40V (emitter open) collector-emitter break down voltage = 15V (base open) Now if we don't leave the base terminal open, say by shunting it with a 10K resistor between base-emitter then can we operate the bjt at higher voltages than 15V. How high ca
I am designing a startup bias circuit for my forward converter , i need a bjt of following configurations Vceo = 400V Ic= 300 mA Also this bjt should be easily available and cheap.
Hi, i googled and it took only 10 seconds to find this : Resistance reflection rule: Resistance looking into the base is (b +1) times total emitter resistance. it is from the document "bjt Amp.pdf" In other words: an amplifying bjt with variable load at emitter will transform the load resistance back to the base of the (...)
As already mentioned: The design is incomplete without details of characteristics of FETs & R values. We have no chance to check your design. Also bjt areas are important.
Heya Korawy, The article at describes driving MOSFET's from logic in considerable detail. I've used the (simple) bjt configuration shown in Fig. 10 on numerous occasions with success using complementary pairs such as the BC337 & 327. Try Rgate = 10R and Rb ~100R (depending on your transistors).
if you can successfully explain bjt operation in the most easiest way to a brain dead like me your successfull. otherwise....... you know the answer;-)
Hello, If i short the comp pin to ground with a bjt in the LM3429, will it make it do soft start? i asked on forum, but no answer there.
1) The voltage at which you get the smallest TC at your op. temp. depends on the process, see e.g. this posting. Also, you might want to study the pdf linked to here. 2) bjt is better: even a low B≈5..10 is
I have a CS amplifier. I need to know the value of gain with feedback. For that I need to know the values of A and 'beta' in the feedback gain formula. What are those values? Thanks in advance. Look at the pdf attachement. It applies to a bjt amplifier - however, you easily can transfer it to a FET circuit.
Please explain the theory behind the early effect in bjt ?
Simple charge pump consists of 4 resistors, 2 bjt's and 2 capacitors for generating square wave and then additional 2 bjts, 2 caps and 2 diodes for pumping circuit. I made something like that on 25 x 27 mm single sided pcb. I guess it could be miniaturized even more with a proffesional-made pcb. U could also swap discrete oscillation circuit for ne
Hi; You are right but simple current mirror is not as you expected from theory. As the load resistor increases they don't work. i advise you to check some modified current mirrors with 3 transistors and so on... See here
I need for my HW bjt small signal scheme of PNP and NPN. It must include Vbe Voltage. Please help me Thanks