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:
Mar. 12, 2002
Filed:
Jul. 16, 2000
Andrija Jezdic, Arlington, TX (US);
John L. Wallberg, Richardson, TX (US);
Bryan E. Bloodworth, Irving, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Fixed gain amplifiers have particular use in the read channel of hard disk drives. A CMOS fixed gain amplifier c having a constant gain over the large dynamic range of hard disk drive applications is provided by incorporating super follower transistors M and M into the input stage of the fixed gain amplifier. The super follower transistors are folded into the output stage of the amplifier. The differential current through the degeneration resistor RE travels through the super follower transistors M and M and into the current mirrors I and I Thus the ac differential current goes directly to the cascoded stage, into the load resistors RL and RL and to the output load.