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:
Nov. 26, 2002
Filed:
Jun. 08, 2001
Hong Jiang, Milpitas, CA (US);
James Nodar, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A circuit ( ) and method are provided for generating a signal ( ) indicating an open impedance fault of a coil ( ) of a write head ( ) of a mass data storage device ( ). The circuit ( ) includes a differential amplifier ( ) with the electrical component ( ) being connected as a load in a first leg thereof. An impedance element ( ) is provided in a second leg of the differential amplifier ( ), and a pair of bipolar transistors ( ) are respectively connected in the first and second legs. The pair of bipolar transistors ( ) have a constant bias voltage (Bias) applied to inputs thereof, and an output circuit is connected to an output node of the first leg of the differential amplifier ( ).