Be yourself; Everyone else is already taken.
— Oscar Wilde.
This is the first post on my new blog. I’m just getting this new blog going, so stay tuned for more. Subscribe below to get notified when I post new updates.
Introduce Yourself (Example Post)
This is an example post, originally published as part of Blogging University. Enroll in one of our ten programs, and start your blog right.
You’re going to publish a post today. Don’t worry about how your blog looks. Don’t worry if you haven’t given it a name yet, or you’re feeling overwhelmed. Just click the “New Post” button, and tell us why you’re here.
Why do this?
- Because it gives new readers context. What are you about? Why should they read your blog?
- Because it will help you focus you own ideas about your blog and what you’d like to do with it.
The post can be short or long, a personal intro to your life or a bloggy mission statement, a manifesto for the future or a simple outline of your the types of things you hope to publish.
To help you get started, here are a few questions:
- Why are you blogging publicly, rather than keeping a personal journal?
- What topics do you think you’ll write about?
- Who would you love to connect with via your blog?
- If you blog successfully throughout the next year, what would you hope to have accomplished?
You’re not locked into any of this; one of the wonderful things about blogs is how they constantly evolve as we learn, grow, and interact with one another — but it’s good to know where and why you started, and articulating your goals may just give you a few other post ideas.
Can’t think how to get started? Just write the first thing that pops into your head. Anne Lamott, author of a book on writing we love, says that you need to give yourself permission to write a “crappy first draft”. Anne makes a great point — just start writing, and worry about editing it later.
When you’re ready to publish, give your post three to five tags that describe your blog’s focus — writing, photography, fiction, parenting, food, cars, movies, sports, whatever. These tags will help others who care about your topics find you in the Reader. Make sure one of the tags is “zerotohero,” so other new bloggers can find you, too.
A Comparison of three amplifier circuits of transistors
A Comparison of three amplifier circuits of transistors
In an electronic circuit, the object of amplification is variation, and the essence of amplification is to control and convert the energy of the DC power supply through active elements (transistors or field effect transistors) under the action of input signal, so that the energy of the output signal obtained by the load from the power source is much larger than that provided by the signal source to the amplifier circuit. Transistor amplifier circuits can be divided into common emitter amplifier circuits, common collector amplifier circuits and common-base amplifier circuits. While field effect transistors can be divided into common source amplifier circuit and common drain amplifier circuit, which are corresponding to common-emitter amplifier circuits and common collector amplifier circuits of transistors.
The three basic amplifier circuits of transistors are compared through the following three main performance indicators (magnification times A, input resistance Ri, and output resistance Ro).
Common emitter amplifier circuit:
Alternating current:
Micro change equivalent circuit:
Magnification times: A=Uo/Ui=-βRc/rbe;
Input resistance: Ri=Rb//rbe;
Input resistance: Ro=Rc;
Common collector amplifier circuit:
alternating current path:
Micro change equivalent circuit:
Magnification times: A=Uo/Ui=IeRe/[Ib(Rb+rbe)+(1+β)IbRe];
Input resistance: Ri=Ui/Ii=Ui/Ib=[Ib(Rb+rbe)+IeRe]/Ib=Rb+rbe+(1+β)Re;
Output resistance: Ro=Re//[(Rb+rbe)/(1+β)];
Common base amplifier circuit:
alternating current path:
Micro change equivalent circuit:
Magnification times: A=Uo/Ui=Ic*Rc/(Ie*Re+Ib*rbe)=βRc/[rbe+(1+β)Re];
Input resistance: Ri=Ui/Ii=Ui/Ie=(Ie*Re+Ib*rbe)/Ie=Re+rbe/(1+β);
Output resistance: Ro=Rc.
The Comparison of three amplification circuits:
A common emitter amplifier circuit can amplify both current and voltage, and the input and output resistances are among the middle place of the three kinds of circuits. The frequency band is narrow. It is commonly used as the unit circuit of a low-frequency voltage amplifier circuit.
A common collector amplifier circuit can only amplify current but voltage. It has the largest input resistance and the smallest output resistance in the three circuits. It has the characteristics of voltage following and is often used in the input and output stages of voltage amplifier circuits.
A common base amplifier circuit can only amplify voltage but current, and the output resistance is small. The magnification times of voltage and output resistance are equivalent to those of the common emitter amplifier circuit, which is with the best high frequency characteristics in the three amplifier circuits. It is often used as a broadband amplifier circuit.
For more information about transistors, please visit this website: http://www.apogeeweb.net/article/72.html
Apogeeweb 