ac bias การใช้

High frequency AC bias was used to linearize the recording.
The original patent for AC bias was filed by W . L . Carlson and Glenn L . Carpenter in 1921, eventually resulting in.
These included both the newer oxide coated PVC tape developed by I . G . Farben ( BASF division ) as well as the AC bias system.
The value of AC bias was somewhat masked by the primitive state of other aspects of magnetic recording, however, and Carlson and Carpenter's achievement was largely ignored.
When the probe and surface are in contact, an AC bias is applied, generating capacitance variations in the sample which can be detected using a GHz resonant capacitance sensor.