ECE-105 Chapter Notes - Chapter 11: Differential Gain, Root Mean Square, Short Circuit
Document Summary
Amplifiers produce an output signal with identical waveshape to the input signal but with a larger amplitude. The voltage produced by the signal source is expressed as: The voltage gain is expressed as the constant: If is negative, the amplifier is called an inverting amplifier. If is positive, the amplifier is called a noninverting amplifier. The output voltage can thus be expressed as: Amplifier input terminals and output terminals are often connected to a common ground node: contact with the chassis ground simultaneous to the respective power-system ground can be fatal diligent caution is advised. If the circuit is open, the voltage gain or open-circuit voltage gain is expressed as: In an open circuit: the current at input or input current is expressed as, the current at output or output current is expressed as, thus, current gain can be expressed as: Uppercase symbols are reserved for root-mean-square (rms) values of current and voltage.
