LOW NOISE AMPLIFIER
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专利名称：LOW NOISE AMPLIFIER 发明人：FENZI, Neal, O.,LONG, Stephen, I. 申请号：US1994 003113 申请日：1994 0323 公开号：WO94 /0234 70P 1 公开日：1994 1013
摘要：A detector for electromagnetic radiation includes a high Q, low loss antenna (56, 58) and a low noise amplifier (66) requiring a high input impedance. In the preferred embodiment, the antenna comprises a low resistance (58), superconductive coil (56). The antenna forms a resonant circuit with a low loss capacitor (64), optionally a capacitor including superconductors. The output of the resonant circuit is provided as input to the semiconductor amplifier. In the preferred embodiment, junction FETs, preferably arranged in a cascode pair, are included in the semiconductor amplifier. In one aspect of the invention, feedback is provided from the output of the amplifier to its input. Effective loading of the antenna results, lowering the Q of the antenna, and broadening the bandwidth of the detector. Optimum matching of the antenna to the noise factor of the amplifier is achieved.
申请人：SUPERCONDUCTOR TECHNOLOGIES, INC. 地址：US 国籍：US 代理机构：MURPHY, David, B. 更多信息请下载全文后查看
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专利名称：LOW NOISE AMPLIFIER 发明人：FENZI, Neal, O.,LONG, Stephen, I. 申请号：US1994 003113 申请日：1994 0323 公开号：WO94 /0234 70P 1 公开日：1994 1013
摘要：A detector for electromagnetic radiation includes a high Q, low loss antenna (56, 58) and a low noise amplifier (66) requiring a high input impedance. In the preferred embodiment, the antenna comprises a low resistance (58), superconductive coil (56). The antenna forms a resonant circuit with a low loss capacitor (64), optionally a capacitor including superconductors. The output of the resonant circuit is provided as input to the semiconductor amplifier. In the preferred embodiment, junction FETs, preferably arranged in a cascode pair, are included in the semiconductor amplifier. In one aspect of the invention, feedback is provided from the output of the amplifier to its input. Effective loading of the antenna results, lowering the Q of the antenna, and broadening the bandwidth of the detector. Optimum matching of the antenna to the noise factor of the amplifier is achieved.
申请人：SUPERCONDUCTOR TECHNOLOGIES, INC. 地址：US 国籍：US 代理机构：MURPHY, David, B. 更多信息请下载全文后查看
ห้องสมุดไป่ตู้