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71. 发明授权

US06922108B2 Active balun circuit for single-ended to differential RF signal conversion with enhanced common-mode rejection 有权
标题翻译：主动平衡 - 不平衡转换电路，用于单端到差分RF信号转换，具有增强的共模抑制
公开(公告)号：US06922108B2
公开(公告)日：2005-07-26
申请号：US09877900
申请日：2001-06-08
申请人： Jenshan Lin
发明人： Jenshan Lin
IPC分类号： H03H11/32 , H03F3/45
CPC分类号： H03H11/32
摘要： An active balun circuit is provided for single-ended to differential RF signal conversion with enhanced common-mode rejection which suppresses common mode signal and which achieves phase and amplitude balance without sophisticated tuning or compensation methods. The circuit has a single-ended input and balanced output with phase and amplitude balance error less than 2° and 1.2 dB, respectively, measured from 1.5 GHz to 1.8 GHz at 5V supply. When supply voltage drops down to 1.5V, its phase and amplitude balance error remains within 5° and 2 dB, respectively. The circuit achieves a balanced output via an output network which behaves as an impedance matching network for differential mode signal and is grounded for common mode signal. As a result, common mode signal is suppressed and 180-degree phase balance at output is achieved. The circuit has high-linearity (P1 dBin=5 dBm, IIP3=16.6 dBm) and low residual phase noise (
摘要翻译：提供了一种主动平衡 - 不平衡转换电路，用于单端到差分RF信号转换，具有增强的共模抑制，可抑制共模信号，无需复杂的调谐或补偿方法即可实现相位和幅度平衡。该电路具有单端输入和平衡输出，相位和幅度平衡误差分别小于2°和1.2 dB，在5V电源下从1.5 GHz到1.8 GHz测量。当电源电压降至1.5V时，其相位和幅度平衡误差分别保持在5°和2 dB之内。该电路通过输出网络实现平衡输出，该输出网络作为差分模式信号的阻抗匹配网络，并为共模信号接地。结果，抑制了共模信号，并且实现了输出时的180度相位平衡。该电路具有高线性度（在 = 5dBm，IIP3 = 16.6dBm中为P1dB <！ - SIPO - >）和低残留相位噪声（在100kHz及以上<-155dBc / Hz）用于基站接收机应用的LO和平衡混频器之间的主动平衡 - 不平衡转换/缓冲放大器。

72. 发明授权

US06917261B2 Component operating with bulk acoustic waves, and having asymmetric/symmetrical circuitry 有权
标题翻译：组件用体声波操作，并具有不对称/对称电路
公开(公告)号：US06917261B2
公开(公告)日：2005-07-12
申请号：US10728462
申请日：2003-12-05
申请人： Michael Unterberger
发明人： Michael Unterberger
IPC分类号： H03H9/00 , H03H9/58 , H03H9/205 , H03H9/54 , H03H11/32
CPC分类号： H03H9/589 , H03H9/0095 , H03H9/584
摘要： A component operating with bulk acoustic waves has two Bulk Acoustic Wave (BAW) resonators that are stacked and are acoustically coupled to one another, with a first resonator being connected to an asymmetric port, and a second resonator being connected to a symmetrical port. The acoustic coupling is provided by a partially permeable coupling layer system, which has an alternating sequence of at least two λ/4 mirror layers with different acoustic impedance. The coupling layer system furthermore has a compensation layer, which has an approximate thickness of λ/8. The compensation layer according to the invention makes it possible to match any discrepancy in the phase difference (which is caused by reflections on the mirror layers) from the predetermined 180° between the connections of the symmetrical port to approximately 180°.
摘要翻译：使用体声波操作的部件具有堆叠并彼此声学耦合的两个体声波（BAW）谐振器，第一谐振器连接到非对称端口，第二谐振器连接到对称端口。声耦合由部分可渗透的耦合层系统提供，该系统具有至少两个具有不同声阻抗的λ/ 4镜层的交替序列。耦合层系统还具有补偿层，其具有λ/ 8的近似厚度。根据本发明的补偿层使得可以将对称端口的连接之间的预定180°的相位差（由反射镜层上的反射引起的）的任何差异与约180°的连接相匹配。

73. 发明授权

US6163287A Hybrid low-pass sigma-delta modulator 有权
公开(公告)号：US6163287A
公开(公告)日：2000-12-19
申请号：US286261
申请日：1999-04-05
申请人： Renyuan Huang
发明人： Renyuan Huang
IPC分类号： H03H11/04 , H03H11/32 , H03H19/00 , H03M3/02 , H03M3/00
CPC分类号： H03M3/344 , H03H11/32 , H03H19/004 , H03M3/43 , H03M3/456
摘要： A hybrid loop filter includes an integrator having an input and an output wherein the output forms an output of the hybrid loop filter, a plurality of transconductance amplifiers having an input and an output wherein each output of the plurality of transconductance amplifiers is coupled to the input of the integrator, a switched capacitor low pass chain having an input and a plurality of branches wherein each of the plurality of branches is coupled to the input of a separate one of said plurality of transconductance amplifiers, and a feedthrough branch having an input and an output wherein the input is coupled to the input of the switched capacitor low pass chain to form an input of said hybrid loop filter, and the output is coupled to the input of a separate one of the plurality of transconductance amplifiers.

74. 发明授权

US6094108A Unbalance-to-balance converter utilizing a transistor 失效
标题翻译：利用晶体管的不平衡平衡转换器
公开(公告)号：US6094108A
公开(公告)日：2000-07-25
申请号：US153329
申请日：1998-09-15
申请人： Noriharu Suematsu , Shigeru Sugiyama , Masayoshi Ono , Yoshitada Iyama , Fumimasa Kitabayashi
发明人： Noriharu Suematsu , Shigeru Sugiyama , Masayoshi Ono , Yoshitada Iyama , Fumimasa Kitabayashi
IPC分类号： H03D7/14 , H03H11/32
CPC分类号： H03H11/32
摘要： An unbalance-to-balance converter includes an FET and a balanced output adjusting capacitor connected between the source terminal of the FET and an earth conductor. The balanced output adjusting capacitor has a capacitance value equal to a capacitance difference Cpd-Cps between a drain side parasitic capacitance Cpd and a source side parasitic capacitance Cps. This makes it possible to solve a problem involved in a conventional unbalance-to-balance converter in that when the drain side parasitic capacitance Cpd differs from the source side parasitic capacitance Cps, a pair of balanced signals output from the drain terminal and source terminal do not have the same amplitude and are not in complete opposition.
摘要翻译：不平衡平衡转换器包括FET和连接在FET的源极端子与接地导体之间的平衡输出调整电容器。平衡输出调整电容器的电容值等于漏极侧寄生电容Cpd与源极侧寄生电容Cps之间的电容差Cpd-Cps。这使得可以解决传统的不平衡转换器中涉及的问题，因为当漏极侧寄生电容Cpd与源极侧寄生电容Cps不同时，从漏极端子和源极端子输出的一对平衡信号没有相同的幅度，并没有完全相反。

75. 发明授权

US5070305A Device for converting unbalanced analog electric signals into fully differential signals 失效
标题翻译：将不平衡模拟电信号转换为完全差分信号的设备
公开(公告)号：US5070305A
公开(公告)日：1991-12-03
申请号：US560428
申请日：1990-07-31
申请人： Pierangelo Confalonieri , Germano Nicollini
发明人： Pierangelo Confalonieri , Germano Nicollini
IPC分类号： H03H11/32 , H03F1/30 , H03F3/00 , H03F3/26
CPC分类号： H03F3/005 , H03F1/303 , H03F3/26
摘要： An all-differential operational amplifier (20) has a first input (22) and a second input (24) and correspondingly has a first output (26) and a second output (28), fed back on its own input respectively through a first (34) and second (36) impedance which are generally resistive and have identical values. The first output is connected to the second input of the operational amplifier across a third impedance (32). A fourth impedance (30), equal in value to the third impedance, is connected in series to the first input and acts as input terminal of the converter. The resistive components of the impedance can be implemented as switched capacitors.

76. 发明授权

US5039891A Planar broadband FET balun 失效
标题翻译：平面无线电平衡器
公开(公告)号：US5039891A
公开(公告)日：1991-08-13
申请号：US453876
申请日：1989-12-20
申请人： Cheng P. Wen , Wing Yau
发明人： Cheng P. Wen , Wing Yau
IPC分类号： H03D7/12 , H03D7/14 , H03H11/32
CPC分类号： H03D7/1441 , H03D7/125 , H03D7/1466 , H03H11/32 , H03D2200/0023 , H03D2200/0084
摘要： Three active FET baluns, using resonant, reactive and resistive/reactive compensation are disclosed suitable for monolithic implementation. A single balanced mixer configuration including a resistive/reactive active FET balun coupled with a pair of single ended FET mixers in a push pull configuration is disclosed which is also suitable for monolithic implementation.
摘要翻译：公开了使用谐振，无功和电阻/无功补偿的三个有源FET巴伦适用于单片实现。公开了一种单平衡混频器配置，其包括与推拉配置中的一对单端FET混频器耦合的电阻/反应式有源FET平衡 - 不平衡变换器，其也适用于单片实现。

77. 发明授权

US5012384A Load circuit for a differential driver 失效
标题翻译：用于差动驱动器的负载电路
公开(公告)号：US5012384A
公开(公告)日：1991-04-30
申请号：US482284
申请日：1990-02-20
申请人： Thomas Chew
发明人： Thomas Chew
IPC分类号： H03H11/32 , H03F3/45 , H04B3/04 , H04L25/02 , H04L25/03
CPC分类号： H04L25/028 , H04L25/0276 , H04L25/0278 , H04L25/0266
摘要： There is disclosed an improved output circuit for use with a differential line driver which drives a parallel inductance and resistance load coupled across the line driver output. The output circuit substantially reduces the kickback voltage produced across the load which results from a residual magnetizing current being stored in the load inductance. The output circuit includes an impedance means which is coupled across the output terminals and a common mode current source coupled between the impedance means and a common potential for sinking a portion of the residual magnetizing current to reduce the amount of residual magnetizing current flowing through the load resistance.

78. 发明授权

US4979218A Balanced output circuit 失效
标题翻译：平衡输出电路
公开(公告)号：US4979218A
公开(公告)日：1990-12-18
申请号：US345486
申请日：1989-05-01
申请人： Chris N. Strahm
发明人： Chris N. Strahm
IPC分类号： H04B3/00 , H03H11/32
CPC分类号： H03H11/32
摘要： An electronic output transformer permits elimination of hum and other ground loop interference from audio signals transmitted between separated pieces of equipment. The transformer has a balanced differential output and feedback circuits which force the differential output voltage to equal the input voltage, and which force the current in the balanced output lines to be precisely equal and out-of-phase. This permits hum and extraneous signal rejection at the input of the remotely located piece of equipment and results in common mode rejection ratios in excess of 100 db.

79. 发明授权

US4795962A Floating driver circuit and a device for measuring impedances of electrical components 失效
标题翻译：浮动驱动器电路和用于测量电气部件阻抗的装置
公开(公告)号：US4795962A
公开(公告)日：1989-01-03
申请号：US93845
申请日：1987-09-04
申请人： Kouichi Yanagawa , Kazuyuki Yagi
发明人： Kouichi Yanagawa , Kazuyuki Yagi
IPC分类号： G01R27/02 , G01R27/00 , H03H11/32
CPC分类号： G01R27/00
摘要： A floating driver circuit. A power supply is connected through a signal source to an amplifier's input terminal. The power supply is also connected to a pair of power supply terminals of the amplifier, via at least one resistor for each power supply terminal, so that direct current flows from the power supply into the power supply terminals. Further, at least one capacitor is connected to each power supply terminal. A cable, preferably coaxial, has first and second conductors. The first conductor is connected to a signal output terminal of the amplifier. The second conductor is connected to the power supply terminals through the capacitors. A pair of these circuits is combined at opposite ends of an electrical component to enable measurement of the impedances thereof.
摘要翻译：一个浮动驱动电路。电源通过信号源连接到放大器的输入端。电源还通过用于每个电源端子的至少一个电阻器连接到放大器的一对电源端子，使得直流电流从电源流入电源端子。此外，至少一个电容器连接到每个电源端子。优选地，同轴的电缆具有第一和第二导体。第一导体连接到放大器的信号输出端。第二导体通过电容器连接到电源端子。一对这些电路在电气部件的相对端组合，以便能够测量其阻抗。

80. 发明授权

US3374448A High efficiency contiguous comb filter 失效
标题翻译：高效连续梳状滤波器
公开(公告)号：US3374448A
公开(公告)日：1968-03-19
申请号：US36977264
申请日：1964-05-25
申请人： DAMON ENG INC
发明人： HURTIG CARL R
IPC分类号： H03H7/42 , H03H7/46 , H03H9/00 , H03H9/54 , H03H9/60 , H03H11/32
CPC分类号： H03H9/0095 , H03H7/46 , H03H9/60

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