What is the primary cause of linear distortion?

The primary cause of linear distortion is attributed to passive devices reflecting energy or altering signal shape. Linear distortion occurs when the waveform of a signal is altered as it passes through a component, such as a cable, filter, or other passive device. This alteration typically manifests as changes in amplitude or phase without introducing new frequencies, affecting the overall integrity of the signal.

When signals travel through passive devices, such as resistors, capacitors, or inductors, their characteristics can change due to the frequency response of those components. For example, if a signal has a certain shape, the passive device might not uniformly allow all frequencies within that signal to pass unaltered, thereby distorting the original waveform. This kind of distortion can lead to a loss of clarity or the introduction of unwanted artifacts in the signal.

Understanding the impact of passive devices on signal transmission is essential for anyone involved in digital communication and electronic design. This knowledge helps in selecting the right components to minimize distortion and maintain signal fidelity.