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1. 发明授权

US06188279B1 Low cost miniature broadband linearizer 有权
标题翻译：低成本微型宽带线性化电路
公开(公告)号：US06188279B1
公开(公告)日：2001-02-13
申请号：US09433128
申请日：1999-11-03
申请人： Cindy H. C. Yuen , Mark D. Adams , James A. Fuchs , Kirk G. Laursen , Steve S. Yang
发明人： Cindy H. C. Yuen , Mark D. Adams , James A. Fuchs , Kirk G. Laursen , Steve S. Yang
IPC分类号： H03F126
CPC分类号： H03F1/3252 , H03F1/3276
摘要： A broadband linearizer for use with a power amplifier. The broadband linearizer includes a preamplifier, a postamplifier and a broadband linearizer bridge coupled between the preamplifier and postamplifier. The linearizer bridge comprises a power divider for coupling power to linear and nonlinear arms, and a power combiner for combining outputs of the linear and nonlinear arms. The linear arm includes a first equalizer and a delay line, and the nonlinear arm includes a distortion generator and an attenuator. A second equalizer is coupled between the power combiner and the postamplifier. A control circuit controls settings of the preamplifier, the broadband linearizer bridge, and the postamplifier. The control circuit outputs voltage bias and constant current signals to control operation of the broadband linearizer. The broadband linearizer provides for independent, flexible gain and phase control that can mate with different kinds of power amplifiers, such as travelling wave tube amplifiers and solid state power amplifiers having various gain and phase performance.
摘要翻译：用于功率放大器的宽带线性化电路。宽带线性化器包括前置放大器，后置放大器和耦合在前置放大器和后置放大器之间的宽带线性化电路桥。线性化电桥包括用于将功率耦合到线性和非线性臂的功率分配器和用于组合线性和非线性臂的输出的功率组合器。线性臂包括第一均衡器和延迟线，非线性臂包括失真发生器和衰减器。功率组合器和后置放大器之间耦合第二均衡器。控制电路控制前置放大器，宽带线性化电路桥和后置放大器的设置。控制电路输出电压偏置和恒流信号，以控制宽带线性化电路的工作。宽带线性化电路提供独立，灵活的增益和相位控制，可以与不同种类的功率放大器匹配，如行波管放大器和具有各种增益和相位性能的固态功率放大器。

2. 发明授权

US5966049A Broadband linearizer for power amplifiers 有权
标题翻译：用于功率放大器的宽带线性化电路
公开(公告)号：US5966049A
公开(公告)日：1999-10-12
申请号：US203257
申请日：1998-12-01
申请人： Cindy H. C. Yuen , Steve S. Yang , Mark D. Adams , Kirk G. Laursen
发明人： Cindy H. C. Yuen , Steve S. Yang , Mark D. Adams , Kirk G. Laursen
IPC分类号： H03F1/32 , H03F1/42 , H03F1/26 , H03F3/68
CPC分类号： H03F1/3276 , H03F1/3252
摘要： A broadband linearizer for use with a power amplifier. The broadband linearizer includes a broadband linearizer bridge, a preamplifier/attenuator, a post amplifier/attenuator, and a control circuit. The broadband linearizer bridge includes a power divider and a power combiner interconnected by linear and nonlinear arms. The linear arm has a phase shifter, a passive equalizer, and a first delay line that are serially coupled together. The nonlinear arm has a distortion generator, an attenuator and a second delay line that are serially coupled together. The control circuit controls respective settings of the broadband linearizer bridge, preamplifier/attenuator and post amplifier/attenuator. The control circuit provides bias circuitry and sends command and telemetry signals to control operation of the broadband linearizer. The broadband linearizer provides for independent, flexible gain and phase control that can mate with different kinds of power amplifiers having various gain and phase performance.
摘要翻译：用于功率放大器的宽带线性化电路。宽带线性化器包括宽带线性化电桥，前置放大器/衰减器，后置放大器/衰减器和控制电路。宽带线性化电路桥包括功率分配器和通过线性和非线性臂互连的功率组合器。线性臂具有串联连接在一起的移相器，无源均衡器和第一延迟线。非线性臂具有串联耦合的失真发生器，衰减器和第二延迟线。控制电路控制宽带线性化电路桥，前置放大器/衰减器和后置放大器/衰减器的各个设置。控制电路提供偏置电路并发送命令和遥测信号以控制宽带线性化电路的工作。宽带线性化电路提供独立，灵活的增益和相位控制，可以与具有各种增益和相位性能的不同种类的功率放大器配合使用。

3. 发明授权

US5317284A Wide band, low noise, fine step tuning, phase locked loop frequency synthesizer 失效
标题翻译：宽带，低噪声，精细阶跃调谐，锁相环频率合成器
公开(公告)号：US5317284A
公开(公告)日：1994-05-31
申请号：US15957
申请日：1993-02-08
申请人： Steve S. Yang
发明人： Steve S. Yang
IPC分类号： H03L7/197 , H03L7/22 , H03L7/23 , H03L7/00
CPC分类号： H03L7/23
摘要： A wide bandwidth, low noise, fine frequency step phase locked loop frequency synthesizer (10) and processing method. The synthesizer (10) includes a first divider (16) for dividing a first signal provided by a reference frequency source (12). A first phase locked loop (20) is provided for receiving a divided first signal from the first divider (16) and providing an intermediate frequency signal in response thereto. The first phase locked loop (20) includes a first phase detector (22) for comparing the phase of the first signal to the phase of a first feedback signal and providing a first phase difference signal in response thereto. The first phase locked loop (20) includes a first voltage controlled oscillator (30) for providing the intermediate signal in response to the first phase difference signal. The first phase locked loop (20) includes a first mixer (32) for mixing the intermediate signal with a second signal at a second frequency F2 and providing the first feedback signal in response thereto. A second divider (38) is included in the first phase locked loop (20) for dividing the first feedback signal prior to its application to the first phase detector (22). A third divider (39) is provided for shifting the frequency of the intermediate frequency signal, and a second phase locked loop (40) is coupled to the third divider for processing the frequency shifted intermediate frequency signal and providing an output frequency signal from the synthesizer. The second phase locked loop (40) includes a second phase detector (42) for comparing the phase of the shifted intermediate signal to the phase of a second feedback signal and providing a second phase difference signal in response thereto. A second voltage controlled oscillator (50) is included for providing the output frequency signal from the synthesizer (10).
摘要翻译：宽带宽，低噪声，精细频率步进锁相环频率合成器（10）及处理方法。合成器（10）包括用于分割由参考频率源（12）提供的第一信号的第一分频器（16）。提供第一锁相环（20），用于从第一分频器（16）接收分频的第一信号，并响应于此提供中频信号。第一锁相环（20）包括第一相位检测器（22），用于将第一信号的相位与第一反馈信号的相位进行比较，并响应于此提供第一相位差信号。第一锁相环（20）包括用于响应于第一相位差信号提供中间信号的第一压控振荡器（30）。第一锁相环（20）包括用于将中间信号与第二频率F2的第二信号混合的第一混频器（32），并响应于此提供第一反馈信号。第二分频器（38）包括在第一锁相环（20）中，用于在施加到第一相位检测器（22）之前将第一反馈信号分割。第三分频器（39）被提供用于移动中频信号的频率，并且第二锁相环（40）耦合到第三分频器，用于处理频移中频信号并提供来自合成器的输出频率信号。第二锁相环（40）包括第二相位检测器（42），用于将移位的中间信号的相位与第二反馈信号的相位进行比较，并响应于此提供第二相位差信号。包括第二压控振荡器（50），用于提供来自合成器（10）的输出频率信号。

4. 发明授权

US5422605A Low-noise push-pull crystal oscillator 失效
标题翻译：低噪声推挽晶体振荡器
公开(公告)号：US5422605A
公开(公告)日：1995-06-06
申请号：US210482
申请日：1994-03-21
申请人： Steve S. Yang , Yiu-Man So
发明人： Steve S. Yang , Yiu-Man So
IPC分类号： H03B5/36
CPC分类号： H03B5/36
摘要： A low phase noise oscillator 10 having a balanced feedback transformer 24 and a push-pull resonant circuit 12 for generating an oscillation excitation signal. The resonant circuit 12 is loaded by an output buffer 20 connected between first and second feedback terminals 16 and 18. The feedback transformer 24 provides first and second feedback paths of opposite phase polarity which link the resonant circuit 12 with the first and second feedback terminals 16 and 18.
摘要翻译：具有平衡反馈变压器24和用于产生振荡激励信号的推挽谐振电路12的低相位噪声振荡器10。谐振电路12由连接在第一和第二反馈端子16和18之间的输出缓冲器20加载。反馈变压器24提供反向相位极性的第一和第二反馈路径，其将谐振电路12与第一和第二反馈端子16连接和18。

5. 发明授权

US4794343A Method and apparatus for calibrating and equalizing a multi-channel automatic gain control amplifier 失效
标题翻译：用于校准和均衡多通道自动增益控制放大器的方法和装置
公开(公告)号：US4794343A
公开(公告)日：1988-12-27
申请号：US926317
申请日：1986-10-31
申请人： Steve S. Yang
发明人： Steve S. Yang
IPC分类号： H03F1/30 , G01S20060101 , G01S7/34 , G01S7/40 , G01S13/44 , H03G20060101 , H03G1/04 , H03G3/00 , H03G3/10 , H03G3/30 , H03F3/68
CPC分类号： H03G3/00 , G01S13/4436 , G01S7/4021
摘要： A plurality of amplifier channels, wherein each channel is automatically gain controlled by a gain control signal and wherein the gain of each channel is a known function of a plurality of constants of corresponding to each amplifier and of the gain control signal, can be calibrated by the following method. The method comprising the steps of measuring each output of each amplifier at a corresponding plurality of gain control values and at a corresponding input to each amplifier. The number of the plurality of the constants equals the number of the plurality of the gain control values. The method continues by computing the gain of each amplifier at the step of measuring. The constants corresponding to each amplifier are then computed according to the function and computed gain. A corresponding changed gain control signal is applied to each amplifier according to the function to set the corresponding gain of each amplifier to a corresponding predetermined calibrated value. By virtue of this methodology, the gain of each channel of a multiple channel amplifier can be not only calibrated to equal a preset value, but the gains of each of the channels can be matched, all without the use of any other additional test equipment.
摘要翻译：多个放大器通道，其中每个通道由增益控制信号自动增益控制，并且其中每个通道的增益是对应于每个放大器和增益控制信号的多个常数的已知功能，可以通过以下方法。该方法包括以对应的多个增益控制值和每个放大器的相应输入端测量每个放大器的每个输出的步骤。多个常数的数量等于多个增益控制值的数量。该方法通过在测量步骤中计算每个放大器的增益来继续。然后根据功能和计算的增益计算对应于每个放大器的常数。根据用于将每个放大器的相应增益设置为相应的预定校准值的功能，将对应的改变的增益控制信号施加到每个放大器。凭借这种方法，多通道放大器的每个通道的增益不仅可以校准为等于预设值，而且可以匹配每个通道的增益，而不需要使用任何其他附加的测试设备。

6. 发明授权

US6118342A System and method for providing precise RF amplifier gain control over temperature 有权
标题翻译：提供精确的RF放大器增益控制的系统和方法
公开(公告)号：US6118342A
公开(公告)日：2000-09-12
申请号：US290812
申请日：1999-04-13
申请人： Steve S. Yang
发明人： Steve S. Yang
IPC分类号： H03F1/30 , H03G1/00 , H03G1/04 , H03G3/20 , H03G3/30 , H03F3/60
CPC分类号： H03F1/30 , H03G1/0058 , H03G1/04 , H03G3/3036
摘要： A system that precisely controls the gain of an RF amplifier over varying temperatures. The system monitors the temperature of the RF amplifier and precisely controls the diode current in PIN diodes to precisely control the gain of the RF amplifier.
摘要翻译：一种在不同温度下精确控制RF放大器增益的系统。该系统监控RF放大器的温度，并精确控制PIN二极管中的二极管电流，以精确控制RF放大器的增益。

7. 发明授权

US5150078A Low noise fine frequency step synthesizer 失效
标题翻译：低噪声精细频率步进合成器
公开(公告)号：US5150078A
公开(公告)日：1992-09-22
申请号：US799817
申请日：1991-11-29
申请人： Steve S. Yang , Keith P. Arnold
发明人： Steve S. Yang , Keith P. Arnold
IPC分类号： H03L7/197 , H03L7/183 , H03L7/185 , H03L7/22 , H03L7/23
CPC分类号： H03L7/185 , H03L7/23
摘要： A frequency synthesizer (10) and method that achieves low phase noise and provides synthesized frequency signals in fine frequency step intervals. The synthesizer (10) comprises an L-band low phase noise frequency synthesizer with fine frequency step increments. The synthesizer (10) employs half-integer digital frequency dividing (25), VCO frequency offsetting, local oscillator harmonic mixing (34) and two phase locked loop circuits (12,13). The synthesizer (10) comprises a reference oscillator (11) for providing a reference frequency signal, and two phase locked loops (12,13). The first loop (12) is the fine loop and generates the frequency step size. The second loop (13) reduces the phase noise, reduces the frequency step size and translates to the desired freqeuncy. The output from a first VCO (21) is divided by a predetermined fixed number (31) to reduce the frequency step size and to reduce the phase noise. The second loop (13) has a second VCO (32) whose output, at L-band, for example, is divided by two (33), and then mixed (34) with the third harmonic of the reference frequency signal to generate an offset frequency signal that is locked to the low phase noise fine frequency step signal of the first loop (12). The output frequency is adjusted by changing the digital programmable half-integer frequency divider (25). The low phase noise and fine frequency step frequency synthesizer (10) provides a major improvement for Doppler radar and communication receivers.

8. 发明授权

US4677392A Cascaded internal impedance dependent amplifier with accurate variable gain control 失效
标题翻译：级联的内部阻抗相关放大器，具有精确的可变增益控制
公开(公告)号：US4677392A
公开(公告)日：1987-06-30
申请号：US809628
申请日：1985-12-16
申请人： Steve S. Yang
发明人： Steve S. Yang
IPC分类号： H03F1/30 , G01S7/34 , G01S7/40 , G01S13/44 , H03G20060101 , H03G1/04 , H03G3/00 , H03G3/10 , H03G3/30
CPC分类号： H03G3/3057 , G01S13/4436 , G01S7/4021 , H03G3/00
摘要： An internal impedance dependent amplifier has a gain as determined by the impedance at a predetermined node within the amplifier. A PIN diode is coupled to the predetermined node. The PIN diode is driven with a forward biased current which serves as the accurate gain control (AGC) signal for the amplifier. In the preferred embodiment, the PIN diode is driven by an operational amplifier in such a manner that the impedance thus coupled to the predetermined node in the amplifier is temperature independent. Because the PIN diode has an impedance given by:log R=A+B log Ip,whereR is the impedance of the PIN diode;IP is the forward biasing current; andA and B constants which are different for each PIN diode,the AGC voltage applied to the operational amplifier driving the PIN diode is linear with respect to the impedance of the PIN diode and hence is also linear with respect to the voltage gain of the impedance controlled amplifier to which the PIN diode is coupled. This characteristic of the gain of the amplifier allows the amplifier to be cascaded in series and to preserve the same impedance relation as expressed above for the cascaded series of amplifiers as well. Thus, the gain in dB of the cascaded series of amplifiers is log linear with respect to a common AGC voltage applied to each of the amplifiers of the series.
摘要翻译：内部阻抗相关放大器具有由放大器内的预定节点处的阻抗确定的增益。 PIN二极管耦合到预定节点。 PIN二极管由正向偏置电流驱动，作为放大器的精确增益控制（AGC）信号。在优选实施例中，PIN二极管由运算放大器驱动，使得这样耦合到放大器中的预定节点的阻抗是温度无关的。因为PIN二极管的阻抗由下式给出：log R = A + B log Ip，其中R是PIN二极管的阻抗; IP是正向偏置电流; 和对于每个PIN二极管不同的A和B常数，施加到驱动PIN二极管的运算放大器的AGC电压相对于PIN二极管的阻抗是线性的，因此也相对于阻抗的电压增益是线性的 PIN二极管耦合到的控制放大器。放大器增益的这一特性允许放大器串联级联，并保持与上面级联放大器系列相同的阻抗关系。因此，级联串联放大器的dB增益相对于施加到串联的每个放大器的公共AGC电压是对数线性的。

9. 发明授权

US06937563B2 Homing and controlling IP telephones 失效
标题翻译：归属和控制IP电话
公开(公告)号：US06937563B2
公开(公告)日：2005-08-30
申请号：US09802195
申请日：2001-03-08
申请人： Andrew C. Preston , Steve J. McKinnon , Steve S. Yang , Joshua Me
发明人： Andrew C. Preston , Steve J. McKinnon , Steve S. Yang , Joshua Me
IPC分类号： H04L12/24 , H04M7/00 , G01R31/08
CPC分类号： H04L41/0893 , H04L65/1033 , H04M7/006
摘要： The present invention relates to providing server functionality in a dedicated module or a specially configured packet-switched telephone. The server function is preferably adapted to control the configuration and operation of a plurality of packet-switched telephones configured to operate as clients of the server function. The server function may control specific operation of the packet-switched telephones as well as support communications between the packet-switched telephones and other telephony devices over the packet-switched network. The server function may operate to facilitate communications with the supported packets-switched telephones using a first protocol and with the other telephony devices using a second protocol. The second protocol is preferably the Session Initiation Protocol (SIP).
摘要翻译：本发明涉及在专用模块或专门配置的分组交换电话中提供服务器功能。服务器功能优选地适于控制被配置为作为服务器功能的客户端来操作的多个分组交换电话的配置和操作。服务器功能可以控制分组交换电话的特定操作，并且通过分组交换网络支持分组交换电话和其他电话设备之间的通信。服务器功能可以操作以促进使用第一协议与支持的分组交换电话的通信，以及使用第二协议与其他电话设备进行通信。第二协议优选地是会话发起协议（SIP）。

10. 发明授权

US06242976B1 Low cost linearized channel amplifier for use with high power amplifiers 有权
标题翻译：低成本线性化通道放大器，用于大功率放大器
公开(公告)号：US06242976B1
公开(公告)日：2001-06-05
申请号：US09328748
申请日：1999-06-09
申请人： Cindy Yuen , Steve S. Yang , Kevin Smith , Mark Adams , David Ethridge
发明人： Cindy Yuen , Steve S. Yang , Kevin Smith , Mark Adams , David Ethridge
IPC分类号： H03G320
CPC分类号： H03F1/30 , H03F1/3247 , H03F1/3282
摘要： A linearized channel amplifier comprising a linear channel amplifier circuit 20 and a nonlinear linearizer circuit located immediately before a high power amplifier. A common control circuit controls the linear channel amplifier circuit and the nonlinear linearizer circuit. The linearized channel amplifier functions as a driver amplifier and improves the linearity and efficiency performance of the high power amplifier across a desired frequency bandwidth. The linearized channel amplifier employs low cost temperature compensation circuits in an interface circuit and a temperature compensation network circuit, and uses a novel methodology to provide for command and control functions that includes a measurement, analytical calculation and setting process. An external personality plug may be to set the performance of the channel amplifier and linearizer.
摘要翻译：一种线性化信道放大器，包括线性信道放大器电路20和紧邻大功率放大器之前的非线性线性化电路。公共控制电路控制线性通道放大器电路和非线性线性化电路。线性化通道放大器用作驱动器放大器，并且在期望的频率带宽上提高高功率放大器的线性度和效率性能。线性化通道放大器在接口电路和温度补偿网络电路中使用低成本温度补偿电路，并且使用新颖的方法来提供包括测量，分析计算和设置过程的命令和控制功能。外部个性插头可以设置通道放大器和线性化器的性能。

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