Source: http://www.google.com/patents/US7847636?dq=system+for+measuring+web+traffic&ei=Lg8FT__TIIr-sQKzxaGRCg
Timestamp: 2016-10-27 20:47:46
Document Index: 624630571

Matched Legal Cases: ['Application No. 2005', 'art 2', 'art 2', 'art 106', 'art 106', 'art 2']

Patent US7847636 - Low noise amplifier for ultra wide band - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA low noise amplifier (LNA) for ultra wide band receives and amplifies identical RF signals in different frequency bands, and includes more than one pair of narrow band LNAs coupled in parallel, and a load circuit which increases load impedance of the entire circuit of the narrow band LNAs. The LNA can...http://www.google.com/patents/US7847636?utm_source=gb-gplus-sharePatent US7847636 - Low noise amplifier for ultra wide bandAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7847636 B2Publication typeGrantApplication numberUS 12/352,380Publication dateDec 7, 2010Filing dateJan 12, 2009Priority dateFeb 1, 2005Fee statusLapsedAlso published asUS7616061, US20060170502, US20090140815Publication number12352380, 352380, US 7847636 B2, US 7847636B2, US-B2-7847636, US7847636 B2, US7847636B2InventorsChoong-yul Cha, Hoon-Tae Kim, Sang-Gug LeeOriginal AssigneeSamsung Electronics Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (8), Classifications (20), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetLow noise amplifier for ultra wide band
US 7847636 B2Abstract
more than one pair of narrow band LNAs which is coupled in parallel, each receives and amplifies identical RF signals in a predetermined frequency band; and
a load circuit which increases load impedance of the entire circuit of the narrow band LNAs,
wherein the amplifying element of each narrow band LNA is connected to a common-gate amplifying element which forms a cascode amplifier together with the amplifying element, and
a buffer amplifying element which includes the load circuit located between a gate and a drain of the buffer amplifying element.
a plurality of narrow band LNAs coupled in parallel, wherein each narrow band LNA receives an identical RF signal and amplifies the RF signal in a predetermined frequency band; and
a load circuit which increases load impedance of the entire circuit,
wherein an amplifying element of each narrow band LNA is connected to a common-gate amplifying element which forms a cascode amplifier together with the amplifying element, and
10. A low noise amplifier (LNA), for ultra wide band (UWB), comprising:
wherein an amplifying element of each narrow band LNA is connected to a common-gate amplifying element which forms a cascode amplifier together with the amplifying element,
wherein each narrow band LNA comprises an inductor connected to a source of the amplifying element, and an inductor connected to a gate of the amplifying element, and
11. The low noise amplifier of claim 8, wherein the inductor connected to the source of the amplifying element and the inductor connected to the gate of the amplifying element are sized to provide a 50Ω input impedance for each narrow band LNA. Description
This is a continuation of application Ser. No. 11/336,788 filed Jan. 23, 2006 now U.S. Pat. No. 7,616,061. The entire disclosure of the prior application, application Ser. No. 11/336,788 is hereby incorporated by reference.
This application claims the benefit under 35 U.S.C. �119(a) from Korean Patent Application No. 2005-9135 filed on Feb. 1, 2005 in the Korean Intellectual Property Office, the entire disclosure of which is incorporated herein by reference.
U.S. Pat. No. 6,806,777 hereafter, referred to as a prior art 2 titled “Ultra Wide Band Low Noise Amplifier And Method” discloses a wide band LNA using a common-gate input as shown in FIG. 3. The LNA of the prior art 2 includes a cascode 102 with a load tracking (LT) network 104, and a common-gate part 106. The common-gate part 106 is in a common-gate amplifier arrangement since an RF signal is input to its source and its gate is AC grounded. Hence, the wide band amplifier can be designed since an RFin terminal can match the wide band impedance. However, the LNA of the prior art 2 cannot obtain high gain due to the impedance but produces high NF as the RF signal is input to the source.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS6806777 *Jan 2, 2003Oct 19, 2004Intel CorporationUltra wide band low noise amplifier and methodUS6809581Apr 23, 2002Oct 26, 2004Broadcom Corp.Integrated circuit low noise amplifier and applications thereofUS7023272Apr 19, 2004Apr 4, 2006Texas Instruments IncorporatedMulti-band low noise amplifier systemUS7081796Feb 11, 2004Jul 25, 2006Silicon Laboratories, Inc.Radio frequency low noise amplifier with automatic gain controlUS7098737May 30, 2003Aug 29, 2006Kabushiki Kaisha ToshibaVariable inductor, oscillator including the variable inductor and radio terminal comprising this oscillator, and amplifier including the variable inductor and radio terminal comprising this amplifierUS7187239 *May 18, 2004Mar 6, 2007Mediatek IncorporationMulti-band low noise amplifierUS7203472Mar 15, 2002Apr 10, 2007Nokia CorporationMethod and apparatus providing calibration technique for RF performance tuningUS7256646 *Jun 21, 2005Aug 14, 2007Seiko Epson CorporationNeutralization techniques for differential low noise amplifiers* Cited by examinerClassifications U.S. Classification330/295, 330/126, 330/283International ClassificationH03F3/68Cooperative ClassificationH03F3/345, H03F1/42, H03F2200/39, H03F2200/372, H03F1/26, H03F2200/36, H03F3/211, H03F2200/294, H03F1/483, H03F1/223European ClassificationH03F1/22B, H03F1/26, H03F3/21C, H03F1/48B, H03F1/42, H03F3/345Legal EventsDateCodeEventDescriptionJul 18, 2014REMIMaintenance fee reminder mailedDec 7, 2014LAPSLapse for failure to pay maintenance feesJan 27, 2015FPExpired due to failure to pay maintenance feeEffective date: 20141207RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services