Fellesmodusspenningsområde

Fellesmodusspenningsområde refers to the range of common-mode voltages that an operational amplifier or other analog circuit can handle while maintaining its specified performance. Common-mode voltage is the voltage that is present on both input terminals of a differential amplifier simultaneously. In an ideal differential amplifier, only the difference between the two input voltages is amplified, and the common-mode voltage is rejected. However, real-world amplifiers have limitations.

The fellesmodusspenningsområde defines the boundaries of these common-mode voltages. If the common-mode voltage exceeds the upper limit, the amplifier may saturate, leading to distorted output. If it falls below the lower limit, the amplifier's performance, such as its gain or linearity, can degrade significantly. This range is crucial for proper circuit design, ensuring that the amplifier operates within its intended specifications under various input conditions.

Factors influencing the fellesmodusspenningsområde include the amplifier's internal architecture, power supply voltages, and the specific circuit design. Datasheets for operational amplifiers typically specify the common-mode voltage range, often expressed as a range relative to the power supply rails. Understanding and adhering to this range is essential for preventing malfunction and achieving accurate signal processing in analog circuits.