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US Patent 7872530 Flexible dynamic range amplifier

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Patent
Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7872530
Patent Inventor Names
Kittichai Phansathitwong1
Henrik Sjöland1
Date of Patent
January 18, 2011
Patent Application Number
12530865
Date Filed
March 13, 2007
Patent Primary Examiner
‌
Henry K Choe
Patent abstract

An amplifying device (10) includes first, second, third and fourth transistors (M1, M2, M3, M4). In the first and third transistors (M1, M3) the source is connected to an input signal source (IN+, IN−), the gate is connected to a biasing potential (VB) and the drain is connected to a signal output (O+, O−). There is a first and second branch (B1, B2) between the source and drain of the first and third transistor (M1, M3), respectively, each including a corresponding second or fourth transistor (M2, M4). The device also includes a third branch (B3) comprising a first capacitor (C1) and a first switch (SW1) connected between the first transistor (M1) source and the third transistor (M3) gate, and a fourth branch (B4) comprising a second capacitor (C2) and a second switch (SW2) connected between the third transistor (M3) source and the first transistor (M1) gate.

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