A dependent voltage source in SPICE is a circuit element that generates a voltage proportional to a specified current or voltage in another part of the circuit. This dependency allows it to model behaviors in active devices like transistors and operational amplifiers, where the output voltage is influenced by an input signal. Dependent voltage sources are characterized by a gain factor and are often denoted by a specific letter in SPICE, such as E for a voltage-controlled voltage source or H for a current-controlled voltage source. They are essential for accurately simulating the dynamic interactions and characteristics of complex electronic circuits.
A dependent current source in SPICE is a circuit element that produces a current proportional to a specified voltage or current elsewhere in the circuit. This dependency allows it to model behavior in active devices like transistors or operational amplifiers, where the output current is influenced by an input signal. Dependent current sources are characterized by a proportionality factor (gain) and are often represented in SPICE with a specific notation, such as G for a transconductance (current controlled by voltage) or F for a current-controlled current source. They are crucial for accurately simulating the dynamic behavior of complex circuits.
Dependent Sources
To add an dependent source click on one of the buttons in the Simulate→Source ribbon button group
 VCVS |
 VCCS |
 CCVS |
 CCCS |