Inventor

JOHANN DONALD F

US6 patents

⚠️ This page may combine multiple inventors who share the name “JOHANN DONALD F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

MAXOPTIX CORP

3 patents

US5341360AAug 23, 1994

Method and apparatus for calibrating laser write power by averaging upper and lower knees of a calibration profile

MAXOPTIX CORP55 citations93

US5396479AMar 7, 1995

Apparatus and method for setting a threshold level to maintain duty cycle in a pulse width modulated optical recording system

MAXOPTIX CORP21 citations90

US5355356AOct 11, 1994

Charge pump for restoring DC in an optical recording read channel

MAXOPTIX CORP28 citations89

SPERRY RAND CORP

2 patents

US4268905AMay 19, 1981

Autonomous fault diagnosis for disk drive using an internal microprocessor

SPERRY RAND CORP54 citations91

US4233666ANov 11, 1980

Drive power sequencing

SPERRY RAND CORP33 citations90

JOHANN DONALD F

1 patent

US5184343AFeb 2, 1993

Compensation for dust on an optical disk by increasing laser writing power

JOHANN DONALD F31 citations88