Schedule as of Oct 11, 2022 - subject to change

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Thursday, October 20 • 9:20am - 9:40am
Reducing Condenser Microphone Distortion Using a Single Chip Phantom Power Circuit

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A phantom power supply increases the load on the output circuit of a condenser microphone and produces harmonic distortion. This effect can be cancelled by substituting two voltage-controlled current sources for the phantom power supply that reduce the load on the microphone output.
This article presents measurements obtained with a single chip. The circuit is produced in an 80 V bipolar process. Distortion artefacts are reduced by up to 4 dB.
A theoretical derivation for predicting the distortion of a phantom power circuit is given. Calculations based on the nonlinearity of transistors used in microphone output stages are compared with measurements and simulations.


Axel Germann

Analog Design Engineer, Prema Semiconductor GmbH
Axel Germann began to study electrical engineering because he became interested in the sound equipment the band he played with was using.As a student, he was involved in the design of a mixing console and a sensor interface that measured small signals in the presence of large voltages.Since... Read More →
avatar for Joost Kist

Joost Kist

Joost Kist is a recording technicien for classical music. Building his own gear, he strives for the best solutions. He invented the True Phantom power because he felt the need to reduce the distortion inherent in recording with phantom power. So he decided to make an addition to standard... Read More →

Thursday October 20, 2022 9:20am - 9:40am EDT
  Transducers, Papers Oct 19 & 20
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