Quote by michael1978 thank you for answer, and R1, R2? but first i am bussy with transistor, is difficult jfet to learn, and for the book, you can buy it chip used boooks in amazone, because i want to open one visa of mastercard
When you use a credit card to open an account with Amazon, make sure don't let your computer remember your password, and Amazon ask you whether you want to keep logging in even you close the page......DON'T. Always logout when you close the page and don't let the computer remember your pass word.

 Quote by yungman When you use a credit card to open an account with Amazon, make sure don't let your computer remember your password, and Amazon ask you whether you want to keep logging in even you close the page......DON'T. Always logout when you close the page and don't let the computer remember your pass word.
yeh i know but there are a lot of hackers today, i have to open only with 200E if it is possible, because i think they will not open with low credit

 Quote by michael1978 JONEY thank you for reply i am learning a lot from you, you are the beste;-) COMPLIMENT
HI Jony how are you, may i ask you something, the schematic of designin of amplifier , you make it with light spice of some other software , because you told me i use light spice,
greetings

 Quote by michael1978 yeh i know but there are a lot of hackers today, i have to open only with 200E if it is possible, because i think they will not open with low credit
Well, there is a balance of being safe and missing out. Write to Amazon and ask what is the best way. It is their utmost interest to keep it safe as their business depends on this too.

 Quote by yungman Well, there is a balance of being safe and missing out. Write to Amazon and ask what is the best way. It is their utmost interest to keep it safe as their business depends on this too.
thnx for reply, yes i know, but i will go first to my bank to ask

 The bank cannot help much, call the credit card company like VISA also. Ask Amazon, they should be able to help you. I have very good experience with Amazon, I have been ordering from them for years, never have a single problem. Their service is second to none......absolutely none. One time I order a tiller.....over 100lbs gas tiller for turning the ground, There was a small crack on some non critical area, I asked for exchange, they shipped me a second one immediately and arranged to pickup the first one. The kicker was I decided to keep the original, they said "no problem", they just arranged to pickup the second one!!!! I buy computers, guitar pickups, protein powders, gifts.....I just paid $1600 to buy a new Nikon camera and Tamron lens from them just a month ago. I even paid a little more just to buy on Amazon because of their service. Oh Yeh, thousands of dollars of text books used from Amazon also. When they say is good condition, they ARE in good condition. Half the time, they look new. One thing about studying, you need books, lots of books. I buy 7 to 8 text books on each subject to compare as no book is good in all topics, each has their strong and weak points. You need a few to get the whole picture. Malvino is one exceptional one. Can you imagine if I buy my two tall book shelves of new books?!!! That would have been very expensive. I just bought the Malvino 6th edition for$8 shipped!!!!

 Quote by yungman The bank cannot help much, call the credit card company like VISA also. Ask Amazon, they should be able to help you. I have very good experience with Amazon, I have been ordering from them for years, never have a single problem. Their service is second to none......absolutely none. One time I order a tiller.....over 100lbs gas tiller for turning the ground, There was a small crack on some non critical area, I asked for exchange, they shipped me a second one immediately and arranged to pickup the first one. The kicker was I decided to keep the original, they said "no problem", they just arranged to pickup the second one!!!! I buy computers, guitar pickups, protein powders, gifts.....I just paid $1600 to buy a new Nikon camera and Tamron lens from them just a month ago. I even paid a little more just to buy on Amazon because of their service. Oh Yeh, thousands of dollars of text books used from Amazon also. When they say is good condition, they ARE in good condition. Half the time, they look new. One thing about studying, you need books, lots of books. I buy 7 to 8 text books on each subject to compare as no book is good in all topics, each has their strong and weak points. You need a few to get the whole picture. Malvino is one exceptional one. Can you imagine if I buy my two tall book shelves of new books?!!! That would have been very expensive. I just bought the Malvino 6th edition for$8 shipped!!!!
i will try, so chip you buy malvino, and do you have 7 edition, if you have 7 edition, wich is better, 6 of 7 edition,

 I have not received it yet. I must had the first edition in the late 70s!!! I long lost the book. The book is in my head and been using what I learned to do a lot of designs all these years. I just want to keep a copy for my collection, not that I need it. I since learn a whole lot more about transistors and op-amps. It is a very good introduction book for electronics.

 Quote by yungman I have not received it yet. I must had the first edition in the late 70s!!! I long lost the book. The book is in my head and been using what I learned to do a lot of designs all these years. I just want to keep a copy for my collection, not that I need it. I since learn a whole lot more about transistors and op-amps. It is a very good introduction book for electronics.
you can find it in internet

 Quote by michael1978 you can find it in internet
I am old school, I want it to be in my hands!!!

I am keeping it as a collection, it's the very first book I used to really learn electronics, it has a special meaning for me. I studied electronics all by myself all these years, books are like my university. I have more books on the subjects I studied than the Stanford University library......A whole lot more. The only way for me is to buy online where I have the resource of the whole world. That's the reason I keep telling you to find a way to buy on Amazon, you can't just go to a book store in your area to look for books, they don't have the vast collection.

 Quote by yungman I am old school, I want it to be in my hands!!! I am keeping it as a collection, it's the very first book I used to really learn electronics, it has a special meaning for me. I studied electronics all by myself all these years, books are like my university. I have more books on the subjects I studied than the Stanford University library......A whole lot more. The only way for me is to buy online where I have the resource of the whole world. That's the reason I keep telling you to find a way to buy on Amazon, you can't just go to a book store in your area to look for books, they don't have the vast collection.
yes i know, because i buy some books here but pfff they dont explain good and you dont learn nothing special to give you some idea to make something, that book understand i think only the author;-), you have so much books, and if you want to buy at amazon, you have to look for used books

 Quote by michael1978 yes i know, because i buy some books here but pfff they dont explain good and you dont learn nothing special to give you some idea to make something, that book understand i think only the author;-), you have so much books, and if you want to buy at amazon, you have to look for used books
I bought 100% used, still cost me thousands!!! The new ones are mostly over $100, even used ones are$40 to $60 each. That's the reason why I was suggesting you to work it out on Amazon. BTW, I received the Malvino, this one is old!! But hey, it's$8.00 to the front door!!! I can't complain.

 Quote by yungman I bought 100% used, still cost me thousands!!! The new ones are mostly over $100, even used ones are$40 to $60 each. That's the reason why I was suggesting you to work it out on Amazon. BTW, I received the Malvino, this one is old!! But hey, it's$8.00 to the front door!!! I can't complain.
yes i understand, i with try first with this book, and to look to open my card, because i dont have so much time, you download books from internet? do you know any site?

 Quote by Jony130 We need Re2 resistor simply because it is almost impassible to build amplifier with desired low voltage gain and Ve > Vbe. Which is needed for good bias point stability. But if you determined to use only Re1 resistor. We need to change DC bias method. So we are not going to use voltage divider, instead of voltage divider we will use a collector-feedback bias circuit. So for our example for Vcc = 10V and Rc = 1K;RL = 10K; Ic = 5mA and Av = 50. re = 26mV/Ic = 5.2Ω Re1 = (Rc||RL)/Av - re = 909Ω/50 - 5.2 = 12Ω Vc = Vcc - Ic*Rc = 5V Vb = Ic*Re1 + Vbe = 0.71V And Ib = Ic/hfe = 5mA/150 = 33.4μA Rb1+Rb2 = (Vc - Vb)/Ib = 4.29V/33.4μA = 128KΩ Rb1 = Rb2 = 128K/2 = 68KΩ And simulation show that voltage gain is equal to AV = 51.8092[V/V]

hi Jony can you help me with this equation
on page 3 post 48
this one Re2 = ( 220 * 11.5 ) / (220 - 12.5) = 12.1 = 12Ω.
is not like you told me Re2 = ( 220 * 11.5 ) / (220 + 12.5) = 12.1 = 12Ω in place from - in plus +

 Quote by michael1978 hi Jony can you help me with this equation on page 3 post 48 this one Re2 = ( 220 * 11.5 ) / (220 - 12.5) = 12.1 = 12Ω. is not like you told me Re2 = ( 220 * 11.5 ) / (220 + 12.5) = 12.1 = 12Ω in place from - in plus +
I read the post 48, I am pretty sure that was not the description of this circuit. There is no Re2, the collector current setting is different.

 Quote by michael1978 yes i understand, i with try first with this book, and to look to open my card, because i dont have so much time, you download books from internet? do you know any site?
I type "free download solution manual Malvino.........." and see what comes up!!!

It's a lot of leg work, you might go around in circles and they end up asking for money, then you have to quit and look for another site. There is no one site for this. But you'll likely find one if you work at it.

 Quote by yungman I read the post 48, I am pretty sure that was not the description of this circuit. There is no Re2, the collector current setting is different.
look page 4 post 49, and you will see
this one Re2 = ( 220 * 11.5 ) / (220 - 12.5) = 12.1 = 12Ω.
is not like you told me Re2 = ( 220 * 11.5 ) / (220 + 12.5) = 12.1 = 12Ω in place from - in plus +
but i think in place from 12.5 is 11.5 jony i think he say to me i make mistake