Registers – Coded record sensors – Particular sensor structure
Patent
1980-02-11
1981-07-28
Cook, Daryl W.
Registers
Coded record sensors
Particular sensor structure
360 26, 360123, G06K 708, G11B 543, G11B 520
Patent
active
042812429
ABSTRACT:
A balancing apparatus particularly useful in a quadrature magnetic head pickup device employs separate amplitude and phase detecting circuitry. A phase detector provides a DC level indicative of a phase variation between a reference signal and a random signal to be compensated. A DC signal is provided which then causes a phase shifter to provide a square wave output indicative of a phase lag or lead, which phase signal is of a magnitude to compensate for the phase angle error of the random signal. An amplitude detector compares the amplitude of the random signal with a predetermined reference signal to provide another DC voltage signal indicative of the amplitude offset. The generated phase and amplitude signals are combined in a summing amplifier to provide an output signal which is fed back to the drive circuitry associated with a magnetic head to compensate for the random signal over a wide range of temperatures. The circuitry provides an output null over a wide temperature range to enable accurate and reliable operation of the magnetic head during a valid read operation associated with the presence of a magnetic material in the vicinity of the head.
REFERENCES:
patent: 3651282 (1972-03-01), Gerry
patent: 3728523 (1973-04-01), Torok
patent: 4130242 (1978-12-01), Mannion
Continental Instruments Corporation
Cook Daryl W.
Plevy Arthur L.
LandOfFree
Balancing apparatus for magnetic circuits employed in data stora does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Balancing apparatus for magnetic circuits employed in data stora, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Balancing apparatus for magnetic circuits employed in data stora will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-550771