vsub

Vsub is not a standalone concept with a single fixed definition; rather, it refers to the use of a subscripted voltage variable in scientific and engineering notation. In many contexts, V_sub denotes a voltage quantity labeled with a subscript to distinguish it from other voltages in a circuit, system, or model. This convention helps users track multiple voltages such as V_subin, V_subout, V_subref, or V_sub1 within the same schematic or analysis.

In electronic circuit analysis, subscripted voltages commonly indicate the potential at specific nodes or across particular components. For example, V_subA might represent the voltage at node A relative to a reference node, while V_subD could denote the drain voltage in a transistor model. The subscripted form aligns with mathematical notation like V_i or V_j and is widely used in textbooks, datasheets, and circuit simulations to avoid ambiguity when several voltages are present.

The term Vsub itself is typically encountered in plain-text documents, manuals, or informal discussions where subscripts cannot be rendered easily. In formal typesetting or digital documents, V_sub is usually written with proper subscript formatting. While Vsub can appear in various disciplines that use voltage notation or subscripts, it does not denote a distinct theory or device by itself. See also: voltage, node voltage, subscript notation, Kirchhoff’s laws.