发明授权
US4115786A Constant wavelength magnetic recording 失效
恒定波长磁记录

Constant wavelength magnetic recording
摘要:
Constant wavelength magnetic imaging is provided by generating a signal having a frequency proportional to the speed of a rotational recording member, multiplying that frequency up to a higher, desired recording frequency, and phase-locking the higher frequency signal to the unmultiplied lower frequency, thus synchronizing the recording frequency with the motor speed.
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