Noise suppression technologies/case study introduction (Automotive)

Example of noise suppression in the power circuits of devices mounted in vehicles - Investigation of noise conditions

Investigation of noise conditions

The initial noise conditions were confirmed and the types of noise were isolated.

Noise was measured for the following three patterns.

  • Conducted noise (150 kHz to 108 MHz)
  • Radiated noise (150 kHz to 30 MHz)
  • Radiated noise (30 kHz to 300 MHz)

Confirmation of noise conditions without measures to suppress noise

Confirmation of noise conditions without measures to suppress noise_image

Investigation of conduction mode of problematic noise (1) - Conducted noise -

The conduction mode (common mode or normal mode) of problematic conducted noise was investigated.

Investigation of conduction mode of problematic noise (1) - Conducted noise - image

Investigation of conduction mode of problematic noise (2) - Radiated noise (150 kHz to 30 MHz) -

The conduction mode (common mode or normal mode) of problematic radiated noise was also investigated. (150 kHz to 30 MHz band)

Investigation of conduction mode of problematic noise (2) - Radiated noise (150 kHz to 30 MHz) - image

Investigation of conduction mode of problematic noise (3) - Radiated noise (30 MHz to 300 MHz) -

The conduction mode (common mode or normal mode) of problematic radiated noise was investigated. (30 MHz to 300 MHz band)

Investigation of conduction mode of problematic noise (3) - Radiated noise (30 MHz to 300 MHz) - image

Related articles