Low distortion audio range class-AB full H-bridge pre-driver amplifier
作者： Edward N. Jeffrey
DOI:
关键词:
摘要: A circuit ( 40 ) and method for applying drive voltages to a voice coil motor (VCM) 22 of mass data storage device 10 has two driver sets, each having high side (HSD) 42,46 low (LSD) 44,48 connected the VCM ). Each set SENSEFETs 50,52 ), power FET sense FET. 106,104 is provided sensing current in LSD, 60,76,74 increasing bias on gates SENSEFET 52 LSD when falls below predetermined level (VREF). Also, 113,114,110 driving HSD level. Thus, at always flows
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