There are four kinds of dependent sources which are named as the voltage controlled voltage source (VCVS), the current controlled voltage source (CCVS), the voltage controlled current source (VCCS), and current controlled current source.

• 一个理想的电流源或电压源，如果它的值受到电路其它量（通常是一个电压或一个电流）的控制，称它为受控源。