The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 1991
Filed:
Jul. 25, 1989
Applicant:
Inventor:
Jack S Swartz, San Jose, CA (US);
Assignee:
Areal Technology, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364707 ; 307 29 ; 360 69 ; 360137 ;
Abstract
A portable computer having an associated disk drive includes a voltage multiplier coupled between a microprocessor and a head positioning actuator that operates in two modes. In a moderate performance mode, the dual mode actuator operates with the power supplied by a storage battery or by a commercial power source with the voltage multiplier turned off. In a high performance mode, the voltage multiplier under control of the microprocessor boosts the voltage supplied to the actuator so that more power is made available for fast head positioning and job execution with an improvement in computer performance.