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. 24, 2015
Filed:
May. 06, 2013
Maxim Integrated Products, Inc., San Jose, CA (US);
Edward W. Liu, Milpitas, CA (US);
Maxim Integrated Products, Inc., San Jose, CA (US);
Abstract
A differential amplifier circuit that includes a negative resistor in parallel to synthesize a larger source resistance is disclosed. In one or more implementations, a differential amplifier circuit includes a first transistor and a second transistor. The first transistor is configured to receive a first differential input and the second transistor is configured to receive a second differential input. The differential amplifier circuit also includes a third transistor and a fourth transistor that form a pair of cross-coupled transistors coupled to the first transistor and the second transistor. The pair of cross-coupled transistors are configured to generate a negative impedance at an output node, and the negative impedance, combined with an impedance of the first transistor, is configured to generate a sufficient termination impedance for a transmission line electrically connected to the output node.