Amplifier modulation
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IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0978329
(2001-10-15)
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발명자
/ 주소 |
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출원인 / 주소 |
- 3M Innovative Properties Company
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
7 인용 특허 :
9 |
초록
▼
In general, the invention is directed to an efficient amplifier for use in radio-frequency identification (RFID) applications. In particular, the invention provides a highly efficient amplifier that requires little power, yet has significant modulation bandwidth to achieve high data communication ra
In general, the invention is directed to an efficient amplifier for use in radio-frequency identification (RFID) applications. In particular, the invention provides a highly efficient amplifier that requires little power, yet has significant modulation bandwidth to achieve high data communication rates. The amplifier makes use of many components of a class E amplifier including a first transistor, an inductor coupling the first transistor to a power supply, and a shunt capacitor connected in parallel to the first transistor. A second transistor is connected in parallel to the first transistor. A controller selectively controls the first and second transistors to achieve amplitude modulation at a high modulation bandwidth.
대표청구항
▼
In general, the invention is directed to an efficient amplifier for use in radio-frequency identification (RFID) applications. In particular, the invention provides a highly efficient amplifier that requires little power, yet has significant modulation bandwidth to achieve high data communication ra
In general, the invention is directed to an efficient amplifier for use in radio-frequency identification (RFID) applications. In particular, the invention provides a highly efficient amplifier that requires little power, yet has significant modulation bandwidth to achieve high data communication rates. The amplifier makes use of many components of a class E amplifier including a first transistor, an inductor coupling the first transistor to a power supply, and a shunt capacitor connected in parallel to the first transistor. A second transistor is connected in parallel to the first transistor. A controller selectively controls the first and second transistors to achieve amplitude modulation at a high modulation bandwidth. O; WO99/001595, WO; WO99/013504, WO; WO99/029924, WO; WO99/041423, WO; WO00/011721, WO; WO00/015865, WO; WO00/015881, WO; WO00/016377, WO; WO00/054320, WO; WO00/063957, WO; WO00/079019, WO; WO00/079576, WO; WO01/015220, WO; WO01/015220, WO; WO01/027346, WO; WO01/027347, WO; WO01/029280, WO; WO01/029891, WO; WO01/029893, WO; WO01/036702, WO; WO01/040541, WO; WO01/066832, WO
이 특허에 인용된 특허 (9)
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Liptak ; Jr. Frank J. (Webster NY) North Arthur J. (Rochester NY), Alarm system for computers and the like.
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Ezequiel Mejia, Apparatus and method for remotely testing a passive integrated transponder tag interrogation system.
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Bowers John H. ; Dutcher Alan, Drive circuit for reactive loads.
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Gallagher ; III William F. ; Barber Russell E. ; Eckstein Eric, Low noise signal generator for use with an RFID system.
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Warble Keith Vaclav ; Myers Ronald Gene ; Cook Dean Lawrence, Low voltage transceiver.
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O'Toole James E. ; Tuttle John R. ; Tuttle Mark E. ; Lowrey Tyler ; Devereaux Kevin M. ; Pax George E. ; Higgins Brian P. ; Ovard David K. ; Yu Shu-Sun ; Rotzoll Robert R., Method of speeding power-up of an amplifier, and amplifier.
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Gallagher ; III William F. ; Barber Russell E., Optical interface between receiver and tag response signal analyzer in RFID system for detecting low power resonant tag.
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Troyk Philip R. (Morton Grove IL) Schwan Martin A. K. (Chicago IL), Self-regulating class E resonant power converter maintaining operation in a minimal loss region.
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Troyk Philip R. (Morton Grove IL) Heetderks William (Silver Spring MD) Schwan Martin (Chicago IL) Loeb Gerald (Northridge CA), Suspended carrier modulation of high-Q transmitters.
이 특허를 인용한 특허 (7)
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Jesme, Ronald David, Amplifier modulation.
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Jiang, Xiaoping, Automobile top antenna devices and antenna amplifiers thereof.
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Bellantoni,John Vincent, Integrated switching device for routing radio frequency signals.
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Bellantoni,John Vincent, Multiprotocol RFID reader.
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Abe, Kazuhide; Sasaki, Tadahiro; Itaya, Kazuhiko; Funaki, Hideyuki, Power amplifier.
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Hammond, Dorothy L., Security device and alarm system.
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Salesky,Ronald; Paranzino,John; Shah,Nimesh, System and method for detecting EAS/RFID tags using step listen.
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