Current-Controlled Voltage Source (CCVS)

Symbol

Information

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

\[V_{out} = R_m \cdot I_{control}\]

Where:

\(V_{out}\) is the output voltage (Volts)
\(I_{control}\) is the controlling input current (Amperes)
\(R_m\) is the transresistance gain (Ohms)

CCVS is commonly used in transimpedance amplifiers, sensors, and analog signal processing.

Ports

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

Symbol description

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

Model

The CCVS model implements an ideal current-controlled voltage source.

A CCVS provides an output voltage proportional to the control current.

Attributes:

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

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

Rm (param): Transresistance gain (Ohms), default is 1.0 Ω.

Methods:

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

\[V_{out} = R_m \cdot I_{control}\]

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

class CCVS(model):
    """
    Current-Controlled Voltage Source (CCVS) model.
    Implements the equation: V_out = Rm * I_control
    """

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

        # Parameter declaration
        self.Rm = param(1.0, 'Ω', 'Transresistance gain')

    def analog(self):
        """Defines the CCVS behavior"""
        self.V_out += self.Rm * self.I_control

Command syntax

The syntax for defining a CCVS in a PyAMS simulation:

# Import the model
from pyams.models import CCVS

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