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LogACDemod (Demodulating AC Logarithmic Amplifier)

Symbol

Available in ADS

Parameters

Name

Description

Units

Default

CurrentSlope

Gradient of transfer characteristic

A/decade

1.e-3

VoltIntercept

Vin for zero output

V

1.e-3

Z1

Reference impedance for port 1

Ohm

50

Notes/Equations
  1. LogACDemod uses a square-law detector and an ideal logarithmic function.
  2. The function is in the form of voltage-input/current-output.
  3. LogACDemod is not recommended for transient simulation.
  4. Several logarithmic amplifiers are available in ADS: LogACDemod, LogDC, LogSuccDetect, and LogTrue. These components accept an RF input and generate a DC output voltage proportional to the log of the input voltage.
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