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. 09, 1999
Filed:
Apr. 01, 1998
Applicant:
Inventor:
Dennis L Rogers, Croton on Hudson, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330 69 ; 330308 ;
Abstract
A low noise, high gain-bandwidth preamplifier is formed which employs positive, capacitive feedback to compensate the frequency response of the amplifier for an applied input capacitance. The circuit includes a differential amplifier circuit with conventional resistive, negative feedback. The circuit further includes a pair of compensating capacitors coupled across the amplifier, providing positive feedback which compensates for an applied input capacitance. The preamplifier circuit provides a high gain-bandwidth along with enhanced noise performance.