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Why do u want to use the DC adaptor anyway.
Use power electronic converters if u wish to directly convert AC to DC.
Advantage will be that the circuit will be small in size and will not be too much complex.
Read about thyristor (SCR) and the related devices in family.
browse journals for...
zopt of the transistor
ya buddy suppose you dont have datasheet or u r a device manufacturere itself .... then how are you gonna determine things like Rn, GAMMAopt over whole band.
design jfet lna
Hi all,
We all know the importance of noise figure in LNA design. One of the most frequently encountered thing is Zopt.
CAN ANYONE TELL HOW Zopt IS FOUND OUT PRACTICALLY ?
Thank you all :)
i have some matlab coddes of wilkinson power divider, stepped impedance lpf, lange coupler. imade these as part of my design lab in mtech in last semester. if u need them, i ca give to u. mail me at abhityagi85@gmail.com . for analysing, u have to be familiar with their operation, understand...
microwave coupler using
try this
**broken link removed**
this is an article of ansoft that says coupler design is verified with hfss
Added after 1 minutes:
also u can have a look at
http://www.dr-hfss.com/HFSS%20Designs.htm
dielectric rogers fr4
i have recently fabricated dual band wilkinson power divider, i had FR4 but its specs include dielectric constant=4.3, loss tangent (electrical)=0.022, thickness=1.58mm
Hello Everybody,
I am a senior pg student of rf and microwave engineering, iit kharagpur, india.
I am working on rf front end for software defined radio.
can anyone help me a good antenna practically realisable for 400 MHz to 3.4GHz
I shll be greatly thankful to you. Articles from IEEE or other...
Hi everybody, This is abhinav, working on rf frontend for sdr
i have a querry regarding mounting of smd components on substrate. how should i do mounting??????? is it different from normal mounting of DIP packages??? if someone can send ur feedback and links related to mounting at...
EMI
emi is the thing where all the designers luks small in this issue..... rally tere are only hundreds of engineers all over the world in this field and i m sure the figure cant cross 1000 even if u count every corner :)
there a simple answer
u know conductor and semiconductor
so i feel u know that the conduction and valence band in metal overlap
but in semicond, they are seperated by few ev energy level
so we can use semi conductor as conducting or non conducting device by supplying some energy but we cant do...
output stage
h
opamp is used to drive small resistive load coz the input impedance of many stages is low. high capacitive load means a lot of device are connected to its output which it should be able to drive. simple :)
flip flop
flip flop is a data storage element that can retain the stored value ubtil next clock OR u want to change or store new data. its diferent from latch coz latch always changexs state when the data input changes but flip flop doesnt
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