Hello Forum,
There are independent and dependent sources (VCVS, CCVS, VCCS, CCCS). A dependent source consists of two parts: controlling part and controlled part. I read that the controlling part is either an open circuit or a short circuit. The controlled part is either a voltage source or a current source.
There are different types of amplifiers:
In general, a device has just one single impedance and impedance matching is often required to avoid energy reflection at the connection interface between different elements....
I read an article about audio amplifiers and speakers (http://www.the-home-cinema-guide.com/speaker-impedance-matching.html#axzz3mDqxGy7z) where it is said that "...As stated earlier, the amplifier doesn't have an output impedance....It is the speaker that has the impedance....Therefore, the impedance you may see listed for an amplifier refers to the optimum speaker impedance that it is designed to drive....You can connect speakers of any impedance to an amplifier and they will work. However, if the amplifier isn't designed to drive speakers with a lower impedance (4 ohms for example), then the amplifier may overheat if you turn the volume up very loud - because it will draw more current than the power supply is designed to deliver...."
thanks!
There are independent and dependent sources (VCVS, CCVS, VCCS, CCCS). A dependent source consists of two parts: controlling part and controlled part. I read that the controlling part is either an open circuit or a short circuit. The controlled part is either a voltage source or a current source.
There are different types of amplifiers:
- voltage amplifiers: the output voltage is larger than the input voltage
- current amplifiers
- power amplifiers
In general, a device has just one single impedance and impedance matching is often required to avoid energy reflection at the connection interface between different elements....
I read an article about audio amplifiers and speakers (http://www.the-home-cinema-guide.com/speaker-impedance-matching.html#axzz3mDqxGy7z) where it is said that "...As stated earlier, the amplifier doesn't have an output impedance....It is the speaker that has the impedance....Therefore, the impedance you may see listed for an amplifier refers to the optimum speaker impedance that it is designed to drive....You can connect speakers of any impedance to an amplifier and they will work. However, if the amplifier isn't designed to drive speakers with a lower impedance (4 ohms for example), then the amplifier may overheat if you turn the volume up very loud - because it will draw more current than the power supply is designed to deliver...."
thanks!