Video amplifier chips are used in circuits used to process video signals. They carry performance specifications such as operating temperature, output power, supply voltage, and supply current. Total harmonic distortion (THD) is also an important consideration. With video amplifier chips, TDH is a measure of the purity of a signal. This value is defined as the ratio of the sum of the powers of harmonic components to the power of the fundamental. Bandwidth, another important consideration, refers to the ability of an audio amplifier chip to provide a maximum output voltage swing with increasing frequency.