[Tank ckt]

Hi audioguru

Anything that resonates with a high impedance makes a sine-wave

can u please explain this point by mathematical way

[Tank ckt]

Hi indulis
  my main question is that how it produces sharp wave form

Thanks

[Tank ckt]

HI

does tank ckt works like this shown in figure

[Tank ckt]

Hi to all

[audioguru fm transmitter]

Hi audioguru
I calculated the frequency of the tank ckt of ur transmitter in which

[Darlington TR]

Hi audioguru

I will design this then I give u for checking
Thanks

[Darlington TR]

Hi audioguru
We have two formulas
1=Cin(miller)=Cbc(Av(mid)+1)
2=Cout(miller)=Cbc((Av+1)/Av)
Can i use these formulas in high frequency
Thanks

[help plzzzzzzz]

Hi mrgjc

[TR datasheet request]

HI hotwaterwizard
Thanks for ur help but the data sheet of CM5943 transistor is by central semiconductor corp plz find any other company which make same part
Thanks

[Darlington TR]

HI audioguru

With VceQ of only 0.5V then the transistor can't do anything useful. Its power dissipation is only 0.5mW (not 5mW) if you need it to operate at such a low power.

i mean

[Darlington TR]

Hi  audioguru
I know that every transistor has its own specfications but today i saw the book of electronic devices by Robert .T. paynter in which he designed the common emitter amplifier by transistor 2N3904 he take VCC=10 and ICQ=1ma and in his design he told that datasheet of 2N3904 gives HFE =70 at ICQ=1ma but we are using HFE= 230 at ICQ=1ma .and he takes VCEQ=0.5VCC as i did so power dissipation by 2N3904 will Pd=ICQ*VCEQ=5mw will be within its maximum rating
it OK for 2N3904 but if we apply the same rule to 2N2222 transistor it datasheet gives this values Ic=150ma,VEC=10v,HFE=100min HFE=max so if we take  this Ic as ICQ and VCE as VCEQ than  1.5W  it is out of rang of 2N2222 800mw
so there fore i asked  this question

[Darlington TR]

HI audioguru
i have a question that indata sheet of any transistor these values are given
Ic=10ma,VCE=10V HFEmin=100,HFEmax=300. so these Ic  and VCE are saturation values    OR    quiescent values

Thanks

[Darlington TR]

HI audioguru
I saw  ur ckt ur using 900mv as input but I m using 5mv and amplifying upto 16.47mv  Av=~3 is this CKT clips on 5mv
Thanks

[Darlington TR]

HI audioguru

I rebiased it again with new values Rc=3.6k,RE=1k,R1=90k,R2=18kC1,C2=10uF
PLZ

[TR datasheet request]

Hi to all
Can any one give me the datasheet of following three

[Darlington TR]

HI audioguru
can u plz make my ckt in ur sim the values are
Rc=3.6K,RE=1K,R1=90k,R2=24k
C1,C2=10uF
Thanks

[Darlington TR]

Hi audioguru
Another problem occure that input  and output are not out of phase image shows this clearly and when i removed bypass and increase  the frequency  the out put is no longer sine wave image shows

[Darlington TR]

Hi audioguru
sorry I worngly write cross instead of gross i reduced the gross over distortion by introducing negative feedback I replace the 100uF bypass capacitor with 1.5uF and  I m attaching Two images first with distortion and second with reduced distortion and show me how much distortion is generating now

Thanks

[Darlington TR]

hi audioguru
ur talking about this cross over distortion which i encircle

[Darlington TR]

Hi audioguru
I m sending U the waveform of amplifier the yellow colour is input and green is output
Thanks :-*

[Darlington TR]

Hi audioguru

Sorry I forgot to write the values of capacitors I uses two

[Darlington TR]

HI audioguru
I rebiased the ckt with HFE=230 it works perfectly ;D ;D i checked in circuitmaker software

[Darlington TR]

HI audioguru
I don't know how to attach the ckt ??? there fore i m giving u assumptions that i made FOR

[Darlington TR]

HI audioguru

Thanks for ur fast reply

Ok Before biasing darlington I biased ordinary transistor 2N3904

[Darlington TR]

HI