chroot said:Resistors in parallel add this way:
[tex]\left( 50k^{-1} + 12k^{-1} \right)^{-1} = 9.68k[/tex]
- Warren
A common-emitter amplifier is a type of electronic amplifier that uses a transistor in a common-emitter configuration to amplify an input signal. It is commonly used in electronic circuits to increase the amplitude of a weak signal.
A common-emitter amplifier works by using a transistor in a common-emitter configuration, where the input signal is applied to the base of the transistor and the output signal is taken from the collector. The transistor amplifies the input signal and the output is larger in amplitude.
Some advantages of using a common-emitter amplifier include high voltage gain, high input impedance, and low output impedance. It also provides good current gain and can handle large input signals.
Common-emitter amplifiers have some limitations, including a low input impedance, which can cause loading effects on the input signal. It also has a limited bandwidth, which may result in distortion of high-frequency signals.
The gain of a common-emitter amplifier can be calculated by dividing the output voltage by the input voltage. It can also be calculated by dividing the output current by the input current. The gain can be affected by the choice of components and the operating conditions of the amplifier.