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21. 发明申请

WO2008021707A3 A WIDE-BAND LOW-NOISE CMOS AMPLIFIER 审中-公开
标题翻译：宽带低噪声CMOS放大器
公开(公告)号：WO2008021707A3
公开(公告)日：2008-07-10
申请号：PCT/US2007074703
申请日：2007-07-30
申请人： MOTOROLA INC , SYED SHAFIULLAH
发明人： SYED SHAFIULLAH
IPC分类号： H03F3/45
CPC分类号： H03F3/45179 , H03F1/26 , H03F3/3022 , H03F2200/294 , H03F2200/372 , H03F2200/451 , H03F2203/45278 , H03F2203/45282 , H03F2203/45288 , H03F2203/45306 , H03F2203/45318 , H03F2203/45352 , H03F2203/45374 , H03F2203/45511 , H03F2203/45722
摘要： A CMOS low-noise wide-band amplifier (LNA) (211) is provided. The LNA can include a Gm doubler (410), a source follower (420), and a coupling circuit (430/440) that couples a differential input to the Gm doubler with the source follower for achieving high linearity over a wide frequency range at a low supply voltage. The coupling circuit can capacitively couple (434/444) a differential input to a gate of the source follower. The gate can be biased to a supply voltage through variable resistors (436/446). A cross coupler (480) can be included in a push-pull buffer (450) for additional gain and for allowing the source follower to drive a low impedance load at low power.
摘要翻译：提供了CMOS低噪声宽带放大器（LNA）（211）。 LNA可以包括Gm倍频器（410），源极跟随器（420）和耦合电路（430/440），其将差分输入与源极跟随器耦合到Gm倍频器，以在宽频率范围内实现高线性度低电源电压。耦合电路可以将差分输入电容耦合（434/444）到源极跟随器的栅极。栅极可以通过可变电阻（436/446）偏置到电源电压。交叉耦合器（480）可以包括在推挽缓冲器（450）中用于额外的增益，并且允许源极跟随器以低功率驱动低阻抗负载。

22. 发明申请

WO9631945A3 AN AMPLIFIER STAGE HAVING A SWITCHABLE GAIN AND REAN AMPLIFIER STAGE HAVING A SWITCHABLE GAIN AND REDUCED DISTORTION DUCED DISTORTION 审中-公开
标题翻译：具有可切换增益的放大器级和具有可切换增益和减少失真导致失真的反相放大器级
公开(公告)号：WO9631945A3
公开(公告)日：1996-12-19
申请号：PCT/IB9600228
申请日：1996-03-18
申请人： PHILIPS ELECTRONICS NV , PHILIPS NORDEN AB
发明人： RIJNS JOHANNES JOZEF FRANCISCU
IPC分类号： H03G3/10 , H03F1/32 , H03F3/45 , H03F3/72
CPC分类号： H03F1/3211 , H03F3/45197 , H03F3/72 , H03F2203/45504 , H03F2203/45511 , H03F2203/45711
摘要： An amplifier stage comprising a differential pair (T1, T2) is provided with a resistive ladder (R1...R2n) coupled between the second control electrodes of said differential pair. Taps on mirror positions along the resistive ladder (R1...R2n) are switchably connected to first and second current source transistors (T3, T4), said current source transistors having their control electrodes connected to the first main electrodes of the transistors forming the differential pair. By placing the switches in series with the current source transistors (T3, T4), the influence of the non-linear impedance of the switches is reduced to negligibly small proportions as the output impedance of the current source transistors (T3, T4) is considerably higher than the impedance of the switches. Thus a linear conversion impedance is obtained, resulting in an amplifier stage having a switchable gain and reduced distortion.

23. 发明申请

WO1993024993A1 INSTRUMENTATION AMPLIFIER 审中-公开
标题翻译：仪表放大器
公开(公告)号：WO1993024993A1
公开(公告)日：1993-12-09
申请号：PCT/NL1993000112
申请日：1993-06-01
申请人： STICHTING VOOR DE TECHNISCHE WETENSCHAPPEN , METTING VAN RIJN, Alexander, Coenraad
发明人： STICHTING VOOR DE TECHNISCHE WETENSCHAPPEN
IPC分类号： H03F03/45
CPC分类号： H03F3/347 , H03F3/45475 , H03F2200/261 , H03F2203/45511 , H03F2203/45512 , H03F2203/45521
摘要： Instrumentation amplifier comprising a reference stage containing a reference amplifier and a differential stage containing a differential amplifier, a first input of the reference amplifier being connected to a first input of the instrumentation amplifier, a first input of the differential amplifier being connected to a second input of the instrumentation amplifier, and an output of the differential amplifier being connected to an output of the instrumentation amplifier, and a second input of the differential amplifier being connected via a first impedance to an output of the reference amplifier and via a second impedance to the output of the differential amplifier. A filter circuit is incorporated between the second impedance and the output of the differential amplifier, of which filter circuit an output is connected to the second impedance, a first input is connected via a third impedance to the output of the differential amplifier, and a second input is connected to the output of the reference amplifier.
摘要翻译：仪表放大器包括：参考级，其包含参考放大器和包含差分放大器的差分级，所述参考放大器的第一输入端连接到所述仪表放大器的第一输入端;所述差分放大器的第一输入端连接到第二输入端并且所述差分放大器的输出端连接到所述仪表放大器的输出端，并且所述差分放大器的第二输入端通过第一阻抗被连接到所述参考放大器的输出，并且经由第二阻抗连接到所述第二阻抗输出差分放大器。滤波器电路被并入在差分放大器的第二阻抗和输出之间，其中滤波电路的输出端连接到第二阻抗，第一输入经由第三阻抗连接到差分放大器的输出，输入连接到参考放大器的输出。

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