Page tree
Skip to end of metadata
Go to start of metadata

AM_ModTuned (AM Modulator, Tuned)

Symbol

Available in ADS

Parameters

Name

Description

Units

Default

ModIndex

Modulation index

None

1.0

Fnom

Nominal input frequency

GHz

1

Rout

Output resistance

Ohm

50

Notes/Equations
  1. This is a tuned modulator that selects the input harmonic defined by the specified Fnom frequency and amplitude modulates it by the baseband modulation input.
    If there is no analysis harmonic frequency close enough to the Fnom frequency, a warning is issued and the output is 0. The two input impedances are infinite. The output impedance is set by Rout, and is limited to a minimum value of 0.1 Ohm. The open circuit output voltage is defined by

    where
    k represents the value at the analysis harmonic frequency closest to the Fnom value
    0 represents the baseband component of the modulation input voltage.
  2. The RF carrier is injected at pin 1; the modulating signal is injected at pin 3. The resulting AM signal is present at pin 2. The RF carrier should be a frequency-domain source; the modulating signal should be a time-domain source.
  3. This model works in transient and baseband envelope simulations. Because the describing equation is valid for baseband signals, Fnom has no effect.
  • No labels