Current-Controlled Current Source (CCCS)

Symbol

Information

A Current-Controlled Current Source (CCCS) is a dependent current source whose output current is proportional to a reference (control) current flowing through a separate circuit branch. The fundamental equation governing CCCS is:

\[I_{out} = k \cdot I_{control}\]

Where:

\(I_{out}\) is the output current (Amperes)
\(I_{control}\) is the controlling input current (Amperes)
\(k\) is the current gain (unitless)

CCCS is commonly used in amplifiers, active filters, and analog signal processing.

Ports

cp, cn: Control current terminals
p, n: Output current terminals

Symbol description

Field	Value
Symbol.name	CCCS
Symbol.file	CCCS.sym
Symbol.directory	Basic
Symbol.referance	`C`
Model.name	`CCCS`
Model.file	CCCS.py

Model

The CCCS model implements an ideal current-controlled current source.

A CCCS provides an output current proportional to the control current.

Attributes:

I_control (signal): Input current signal that controls the output current, defined between nodes (cp, cn).

I_out (signal): Output current signal delivered to the circuit, defined between nodes (p, n).

k (param): Current gain (dimensionless), default is 1.0.

Methods:

analog(): Defines the CCCS behavior using the equation:

\[I_{out} = k \cdot I_{control}\]

from pyams.lib import model, signal, param, current

class CCCS(model):
    """
    Current-Controlled Current Source (CCCS) model.
    Implements the equation: I_out = k * I_control
    """

    def __init__(self, cp, cn, p, n):
        # Signal declaration
        self.I_control = signal('in', current, cp, cn)
        self.I_out = signal('out', current, p, n)

        # Parameter declaration
        self.k = param(1.0, '', 'Current gain')

    def analog(self):
        """Defines the CCCS behavior"""
        self.I_out += self.k * self.I_control

Command syntax

The syntax for defining a CCCS in a PyAMS simulation:

# Import the model
from pyams.models import CCCS

# CCCSname: is the name of the CCCS instance
# cp, cn: The control current terminals
# p, n: The output current terminals
CCCSname = CCCS(cp, cn, p, n)