jännitelähteinen

Jännitelähteinen is a Finnish term that translates to "voltage-driven" or "voltage-source" in English. It refers to an electrical circuit or component that is characterized by its ability to maintain a constant voltage output, regardless of the load connected to it. This means that as the current drawn from the source changes, the voltage across its terminals remains stable.

This characteristic is fundamental in many electronic applications. For instance, power supplies in electronic devices are designed to be voltage sources, providing a stable voltage to power various components. Batteries, when they are not significantly discharged, also approximate voltage sources. In contrast, a current source aims to maintain a constant current output, irrespective of the voltage across its terminals.

The ideal voltage source has zero internal resistance. In reality, all voltage sources have some internal resistance, which causes the output voltage to drop slightly as the load current increases. However, for many practical purposes, a good voltage source exhibits a very low internal resistance, making its voltage output relatively insensitive to load variations within its operational limits. Understanding whether a circuit element is voltage-driven or current-driven is crucial for analyzing circuit behavior and designing functional electronic systems.