Voltage-Controlled Voltage Source (VCVS)

Symbol

Information

A Voltage-Controlled Voltage Source (VCVS) is a dependent voltage source whose output voltage is proportional to a reference (control) voltage applied across a separate circuit branch. The fundamental equation governing VCVS is:

\[V_{out} = G_v \cdot V_{control}\]

Where:

\(V_{out}\) is the output voltage (Volts)
\(V_{control}\) is the controlling input voltage (Volts)
\(G_v\) is the voltage gain (dimensionless)

VCVS is commonly used in operational amplifiers, active filters, and circuit modeling.

Ports

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

Symbol description

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

Model

The VCVS model implements an ideal voltage-controlled voltage source.

A VCVS provides an output voltage proportional to the control voltage.

Attributes:

V_control (signal): Input voltage 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).

Gv (param): Voltage gain (dimensionless), default is 1.0.

Methods:

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

\[V_{out} = G_v \cdot V_{control}\]

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

class VCVS(model):
    """
    Voltage-Controlled Voltage Source (VCVS) model.
    Implements the equation: V_out = Gv * V_control
    """

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

        # Parameter declaration
        self.Gv = param(1.0, '', 'Voltage gain')

    def analog(self):
        """Defines the VCVS behavior"""
        self.V_out += self.Gv * self.V_control

Command syntax

The syntax for defining a VCVS in a PyAMS simulation:

# Import the model
from pyams.models import VCVS

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