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1. 发明申请

US20050088252A1 Balun transformer with means for reducing a physical dimension thereof 有权
标题翻译：平衡变压器，具有用于减小其物理尺寸的装置
公开(公告)号：US20050088252A1
公开(公告)日：2005-04-28
申请号：US10984771
申请日：2004-11-10
申请人： Lawrence Burns , Carl Pobanz
发明人： Lawrence Burns , Carl Pobanz
IPC分类号： H01P5/10 , H05K1/02
CPC分类号： H05K1/0239 , H01P5/10 , H05K2201/10015
摘要： The invention is a balun transformer that converts a single-ended (or unbalanced) signal to a differential (or balanced) signal. The balun is a printed metal pattern on a circuit board in conjunction with several low cost chip capacitors and a low cost chip inductor. The balun transformer is a modified Marchand balun that is implemented using printed transmission lines. The balun has a plurality of coupled transmission lines to improve tolerances to variations in PC board fabrication. To make the balun compact, it is electrically lengthened through the use of capacitive loading, which reduces the required physical size. Additionally, the capacitors increase the bandwidth due to the resonant interaction between the short inductive balun and the capacitors that are placed in series with the input and the output.
摘要翻译：本发明是将单端（或不平衡）信号转换为差分（或平衡）信号的平衡 - 不平衡变压器。平衡 - 不平衡转换器是电路板上的印刷金属图案，结合几个低成本芯片电容器和低成本芯片电感器。平衡 - 不平衡变压器是采用印刷传输线实现的经修改的Marchand平衡 - 不平衡变压器。平衡 - 不平衡转换器具有多个耦合传输线，以改善对PC板制造变化的公差。为了使平衡 - 不平衡变压器紧凑，通过使用电容负载来电延长，这减少了所需的物理尺寸。此外，由于短路感应平衡 - 不平衡变压器和与输入和输出串联放置的电容器之间的谐振相互作用，电容器增加了带宽。

2. 发明申请

US20050093661A1 Printed bandpass filter for a double conversion tuner 失效
标题翻译：双转换调谐器的带通滤波器
公开(公告)号：US20050093661A1
公开(公告)日：2005-05-05
申请号：US10994633
申请日：2004-11-23
申请人： Ramon Gomez , Lawrence Burns , Sung-Hsien Chang , Carl Pobanz
发明人： Ramon Gomez , Lawrence Burns , Sung-Hsien Chang , Carl Pobanz
IPC分类号： H01P1/203 , H05K1/16 , H01P1/20
CPC分类号： H01P7/00 , H01P1/20 , H01P1/203 , H01P1/20381 , H05K1/165
摘要： A printed bandpass filter is mounted on a precision substrate to eliminate the need for post-fabrication tuning. The filter input is capacitively coupled to a series of quarter wavelength resonators and the filter output. The quarter wavelength resonators are printed as spirals to reduce filter size. The resonators define the bandpass characteristics of the filter. The filter also weakly couples the input signal to the filter output in a manner to cancel the signal image. Mechanical clips mitigate thermal stress on solder connections when the precision substrate is mounted on a second printed circuit board.
摘要翻译：印刷的带通滤波器安装在精密基板上，以消除对制造后调谐的需要。滤波器输入电容耦合到一系列四分之一波长谐振器和滤波器输出。四分之一波长谐振器被打印为螺旋线以减小滤波器尺寸。谐振器定义滤波器的带通特性。滤波器也以以消除信号图像的方式将输入信号弱耦合到滤波器输出。当精密基板安装在第二印刷电路板上时，机械夹可减轻焊接连接处的热应力。

3. 发明申请

US20080036557A1 Compact bandpass filter for double conversion tuner 失效
标题翻译：紧凑型带通滤波器，用于双转换调谐器
公开(公告)号：US20080036557A1
公开(公告)日：2008-02-14
申请号：US11892097
申请日：2007-08-20
申请人： Sung-Hsien Chang , Ramon Gomez , Lawrence Burns , Carl Pobanz
发明人： Sung-Hsien Chang , Ramon Gomez , Lawrence Burns , Carl Pobanz
IPC分类号： H01P1/20
CPC分类号： H01P7/00 , H01P1/20 , H01P1/203 , H01P1/20381 , H05K1/165
摘要： A bandpass filter includes a plurality of resonators. An input pin is connected to a first resonator of the plurality of resonators. An output pin is connected to a second resonator of the plurality of resonators. The first and second resonators are magnetically coupled to each other. The first and second resonators are coupled to other resonators using mixed coupling. The other resonators are coupled to each other using electric coupling.
摘要翻译：带通滤波器包括多个谐振器。输入引脚连接到多个谐振器的第一谐振器。输出引脚连接到多个谐振器的第二谐振器。第一和第二谐振器彼此磁耦合。第一和第二谐振器使用混合耦合耦合到其它谐振器。其他谐振器使用电耦合彼此耦合。

4. 发明申请

US20050280435A1 OUTPUT BUFFER WITH TIME VARYING SOURCE IMPEDANCE FOR DRIVING CAPACITIVELY-TERMINATED TRANSMISSION LINES 有权
标题翻译：输出缓冲器随时间变化的阻力，用于驱动能力终端传输线
公开(公告)号：US20050280435A1
公开(公告)日：2005-12-22
申请号：US10871459
申请日：2004-06-18
申请人： Nikhil Srivastava , Gopal Raghavan , Carl Pobanz
发明人： Nikhil Srivastava , Gopal Raghavan , Carl Pobanz
IPC分类号： H03K3/00 , H03K19/003 , H03K19/0175 , H04L25/02
CPC分类号： H04L25/0288 , H03K19/017545 , H04L25/026
摘要： An output buffer for driving a capacitively-terminated transmission line produces a waveform which comprises a first portion during which the waveform transitions from a voltage V1 to a voltage V2; a second portion during which it remains fixed at V2; a third portion during which it transitions to a voltage V3; and a fourth portion during which it remains fixed at V3. The waveform is created within a unit interval whenever successive data bits transition between logic states. The first and second portions are generated with circuitry arranged such that V2 is maximized by reducing the buffer's output impedance. The fourth portion is generated with circuitry which has a non-zero output impedance preferably equal to the transmission line's characteristic impedance, to absorb transitions reflected back to the source circuitry by the capacitive termination.
摘要翻译：用于驱动电容端接的传输线的输出缓冲器产生波形，该波形包括波形从电压V 1转换到电压V 2的第一部分; 第二部分，其保持固定在V 2处; 第三部分，其中它转变到电压V 3; 以及第四部分，其中它保持固定在V 3。当连续的数据位在逻辑状态之间转换时，波形在单位间隔内创建。第一和第二部分通过布置成使得V 2通过减小缓冲器的输出阻抗而最大化的电路产生。第四部分由具有非零输出阻抗的电路产生，其优选地等于传输线的特性阻抗，以吸收通过电容性端接反射回到源电路的转变。

5. 发明申请

US20050147136A1 Fast high-swing modulator driver circuit 有权
标题翻译：快速高频调制驱动电路
公开(公告)号：US20050147136A1
公开(公告)日：2005-07-07
申请号：US10748506
申请日：2003-12-29
申请人： Carl Pobanz
发明人： Carl Pobanz
IPC分类号： G02F1/01 , H01S3/00 , H01S3/10 , H01S5/042
CPC分类号： G02F1/0121 , H01S5/0427
摘要： A fast, high-swing driver circuit for driving an electro-optical modulator includes an output stage comprising first and second transistors arranged as a differential pair. The collector of the first transistor is coupled to ground, and its base provides the stage's input. The collector of the second transistor is coupled via an impedance to a supply voltage, and provides the stage's output. A reference voltage is provided to the second transistor's base, which is also AC-coupled to ground. A bias generator provides the second transistor's base voltage, and a second differential pair converts a differential input signal to a single-ended output that drives the output stage's input—preferably via a pair of cascaded emitter-follower stages that serve to present a low impedance. A complete electro-optical modulator driver is formed with the addition of a bias-T network at the output stage's output.
摘要翻译：用于驱动电光调制器的快速，高摆幅驱动器电路包括输出级，包括布置为差分对的第一和第二晶体管。第一晶体管的集电极耦合到地，并且其基极提供阶段的输入。第二晶体管的集电极通过阻抗耦合到电源电压，并提供该级的输出。参考电压被提供给第二晶体管的基极，其也被AC耦合到地。偏置发生器提供第二晶体管的基极电压，并且第二差分对将差分输入信号转换成驱动输出级输入的单端输出，优选地经由一对级联发射极跟随器级，用于呈现低阻抗。在输出级的输出端添加一个偏置T网络形成完整的电光调制器驱动器。

6. 发明授权

US06750709B2 Bipolar transistor-based linearizer with programmable gain and phase response system 失效
标题翻译：具有可编程增益和相位响应系统的双极晶体管线性化
公开(公告)号：US06750709B2
公开(公告)日：2004-06-15
申请号：US10021423
申请日：2001-11-30
申请人： Gopal Raghavan , Michael G. Case , Carl Pobanz
发明人： Gopal Raghavan , Michael G. Case , Carl Pobanz
IPC分类号： H03F126
CPC分类号： H03F3/58 , H03F1/3223 , H03F3/211
摘要： A bipolar transistor-based linearizer with programmable gain and phase response apparatus uses a splitter to separate an incoming RF signal into two equal components: in-phase (I) and quadrature (Q, ninety degrees delayed). The I signal then passes through a first bipolar variable gain amplifier (VGA) while the Q signal passes through a second bipolar VGA. After passing through the first and second VGAs, the amplified signals are combined at the output using a summer to produce a predistorted signal that drives a TWTA. The gains of each VGA are controlled using an RF power detector in conjunction with a bipolar gain/phase slope controller. Each gain can be adjusted separately to product a large range of linearization characteristics.
摘要翻译：具有可编程增益和相位响应装置的基于双极晶体管的线性化电路使用分离器将输入的RF信号分成两个相等的分量：同相（I）和正交（Q，九十度延迟）。然后，I信号通过第一双极可变增益放大器（VGA），同时Q信号通过第二个双极VGA。经过第一和第二VGA后，放大的信号在输出端使用一个加法器组合，以产生一个驱动TWTA的预失真信号。每个VGA的增益都使用RF功率检测器和双极增益/相位斜率控制器进行控制。每个增益可以单独调整，以产生大范围的线性化特性。

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