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:
Jul. 29, 2014
Filed:
Dec. 27, 2013
Lsi Corporation, San Jose, CA (US);
Michael Straub, Longmont, CO (US);
Andrew P. Krebs, Eagan, MN (US);
LSI Corporation, San Jose, CA (US);
Abstract
A balanced amplifier with a relatively high input impedance with wide bandwidth for use as a fly-height sensor head preamplifier in a magnetic storage read system. The balanced amplifier has two substantially identical halves, each amplifier half having an input transistor, responsive to the input node of the amplifier half disposed in series with a cross-coupling transistor receiving a buffered cross-coupled version of the input signal applied to the other half of the balanced amplifier. Use of cascoded transistors and voltage-followers to limit voltages across various the input and cross-coupling transistors enhance the common mode rejection and power supply rejection ratios of the amplifier while retaining a low high-frequency noise figure similar to low-input impedance balanced amplifier designs.