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:
Jun. 11, 2002
Filed:
Sep. 29, 2000
Daniel Shkap, Cambridge, MA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
This invention relates to a gain stage of a differential amplifier used in an intermediate frequency, voltage gain amplifier to producing a substantially linear, differential output signal for both small and large differential input signals. The invention comprises a gain regulation means in parallel with a pair of transistors forming a differential amplifier. Each transistor of the pair is connected to a first terminal of a power source through a separate impedance element. A current source connects the pair of transistors to a second terminal of the power source. The gain regulation means is connected between the first terminal of the power source and the current source such that it may develop a voltage potential between the first terminal of the power supply and the current source that varies linearly in response to an input signal.