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公开(公告)号：US20050212600A1
公开(公告)日：2005-09-29
申请号：US10806139
申请日：2004-03-23
申请人： Janice Chiu
发明人： Janice Chiu
CPC分类号： H03G3/3052 , H03G3/3068
摘要： A circuit is provided for controlling the gain of an amplifier, such as an amplifier that may be used in telecommunication devices. The circuit includes an analog portion that receives signals from one or more mixers and that produces an output that is an inverse logarithmic function of the input signal. The output signal is digitally processed by a digital portion of the circuit, which determines whether gain of the amplifier should be increased, decreased, or held constant. Also, methods are provided for controlling the gain of an amplifier.
摘要翻译： 提供用于控制放大器的增益的电路，例如可以在电信设备中使用的放大器。 该电路包括从一个或多个混频器接收信号并产生作为输入信号的反对数函数的输出的模拟部分。 输出信号由电路的数字部分进行数字处理，其确定放大器的增益是否应当增加，减小或保持恒定。 此外，提供了用于控制放大器的增益的方法。
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公开(公告)号：US07133655B2
公开(公告)日：2006-11-07
申请号：US10806140
申请日：2004-03-23
申请人： Janice Chiu
发明人： Janice Chiu
IPC分类号： H04B17/00
CPC分类号： H04B17/318 , H03F2203/45654 , H04W52/52
摘要： A signal strength indicator circuit that includes a first amplifier configured to receive a first input signal from a first mixer and a second input signal from a second mixer;. The circuit also includes a second amplifier configured to receive a first set of differential inputs from the first amplifier. The circuit further includes a third amplifier configured to receive a second set of differential inputs from the second amplifier stage. Even further, the circuit includes an output port for emitting an output signal that is a rectified combination of the first input signal and the second input signal. Also, a method of processing signals input into a signal strength indicator circuit.
摘要翻译： 信号强度指示器电路，其包括被配置为从第一混频器接收第一输入信号的第一放大器和来自第二混频器的第二输入信号。 电路还包括配置成从第一放大器接收第一组差分输入的第二放大器。 电路还包括配置成从第二放大器级接收第二组差分输入的第三放大器。 另外，该电路包括用于发射作为第一输入信号和第二输入信号的整流组合的输出信号的输出端口。 另外，处理输入信号强度指示电路的信号的方法。
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公开(公告)号：US20050208901A1
公开(公告)日：2005-09-22
申请号：US10852470
申请日：2004-05-24
申请人： Janice Chiu , Shahla Khorram , Qiang (Tom) Li
发明人： Janice Chiu , Shahla Khorram , Qiang (Tom) Li
摘要： A transceiver front end includes a transmit/receive (T/R) switch, a first balun, a second balun, a low noise amplifier, a power amplifier, and compensation circuitry. The T/R switch is operably coupled to an antenna for receiving inbound radio frequency (RF) signals and for transmitting outbound RF signals. The first balun includes a single ended winding and a differential winding, where the single ended winding is operably coupled to the T/R switch. The second balun includes a single ended winding and a differential winding, where the single ended winding is operably coupled to the T/R switch. The low noise amplifier is operably coupled the differential winding of the first balun. The power amplifier is operably coupled to the differential winding of the second balun. The compensation circuitry is operably coupled to the first balun to compensate for at least one of phase imbalance, amplitude imbalance, and impedance imbalance of the first balun.
摘要翻译： 收发器前端包括发射/接收（T / R）开关，第一平衡 - 不平衡转换器，第二平衡 - 不平衡转换器，低噪声放大器，功率放大器和补偿电路。 T / R开关可操作地耦合到天线，用于接收入站射频（RF）信号和用于发送出站RF信号。 第一个平衡 - 不平衡变压器包括单端绕组和差动绕组，其中单端绕组可操作地耦合到T / R开关。 第二平衡 - 不平衡变压器包括单端绕组和差动绕组，其中单端绕组可操作地耦合到T / R开关。 低噪声放大器可操作地耦合第一平衡 - 不平衡变换器的差动绕组。 功率放大器可操作地耦合到第二巴伦的差动绕组。 补偿电路可操作地耦合到第一平衡 - 不平衡变换器，以补偿第一平衡 - 不平衡变换器的相位不平衡，幅度不平衡和阻抗不平衡中的至少一个。
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公开(公告)号：US20120326795A1
公开(公告)日：2012-12-27
申请号：US13170106
申请日：2011-06-27
申请人： Janice Chiu , Srinivas Badam
发明人： Janice Chiu , Srinivas Badam
摘要： A technique to use a two-step calibration procedure to calibrate a voltage controlled oscillator (VCO) of a phase-locked loop. The first calibration step is an open-loop calibration procedure in which a control voltage of the VCO is temperature compensated and the VCO is tuned using a search routine to generate a corresponding output frequency based on the control voltage. The second step is a closed-loop calibration procedure to adjust the tuning components of the VCO to correct for a 1 LSB error.
摘要翻译： 一种使用两步校准程序来校准锁相环的压控振荡器（VCO）的技术。 第一校准步骤是开环校准程序，其中VCO的控制电压被温度补偿，并且使用搜索程序调谐VCO，以基于控制电压产生相应的输出频率。 第二步是闭环校准程序，以调整VCO的调谐组件，以校正1 LSB误差。
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公开(公告)号：US20070293158A1
公开(公告)日：2007-12-20
申请号：US11455798
申请日：2006-06-19
申请人： Janice Chiu
发明人： Janice Chiu
IPC分类号： H04B17/00
CPC分类号： H04B17/15
摘要： An apparatus and method are described that provide efficient testing of an integrated circuit wireless transceiver. A digital to analog converter and suitable connection and control logic are integrated on the chip to allow testing of the internal parts of the transceiver by selecting one of a number of predefined test points within the transceiver circuitry. The control logic may configure the digital to analog converter differently, depending on which test point is selected. Also, the digital to analog converter may experience an offset voltage, depending on which test point is selected. Thus, the digital to analog converter may be a current-source digital to analog converter having an offset current source to counter the offset voltage.
摘要翻译： 描述了提供集成电路无线收发器的有效测试的装置和方法。 数字到模拟转换器和合适的连接和控制逻辑集成在芯片上，以通过选择收发器电路内的多个预定义的测试点之一来测试收发器的内部部件。 根据选择哪个测试点，控制逻辑可以不同地配置数模转换器。 此外，数模转换器可能会经历偏移电压，具体取决于选择了哪个测试点。 因此，数模转换器可以是具有偏移电流源以抵消偏移电压的电流源数模转换器。
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公开(公告)号：US07420497B2
公开(公告)日：2008-09-02
申请号：US11477271
申请日：2006-06-28
申请人： Janice Chiu
发明人： Janice Chiu
IPC分类号： H03M1/12
CPC分类号： H03M1/0607 , H03M1/365
摘要： A quantizer is described for use in a flash analog to digital converter (ADC), which may be implemented as part of an integrated wireless transceiver or other highly integrated electrical circuit. The quantizer may be configured to operate within such a flash ADC in an accurate manner within a desired voltage range, while minimizing factors that may otherwise lead to errors in the analog-to-digital conversion process. For example, a comparator of the quantizer may be used that has properties that are particularly well-suited for such an environment, where such properties may include, for example, a relatively low input referred offset voltage that is associated with a preamplifier of the comparator.
摘要翻译： 描述了用于闪存模数转换器（ADC）的量化器，其可以被实现为集成无线收发器或其它高度集成的电路的一部分。 量化器可以被配置为在期望的电压范围内以精确的方式在这样的闪存ADC内操作，同时最小化否则将导致模数转换处理中的错误的因素。 例如，可以使用量化器的比较器，该比较器具有特别适合于这样的环境的特性，其中这样的特性可以包括例如与比较器的前置放大器相关联的相对低的输入参考偏移电压 。
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公开(公告)号：US20080001807A1
公开(公告)日：2008-01-03
申请号：US11477271
申请日：2006-06-28
申请人： Janice Chiu
发明人： Janice Chiu
IPC分类号： H04N7/26
CPC分类号： H03M1/0607 , H03M1/365
摘要： A quantizer is described for use in a flash analog to digital converter (ADC), which may be implemented as part of an integrated wireless transceiver or other highly integrated electrical circuit. The quantizer may be configured to operate within such a flash ADC in an accurate manner within a desired voltage range, while minimizing factors that may otherwise lead to errors in the analog-to-digital conversion process. For example, a comparator of the quantizer may be used that has properties that are particularly well-suited for such an environment, where such properties may include, for example, a relatively low input referred offset voltage that is associated with a preamplifier of the comparator.
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公开(公告)号：US07269391B2
公开(公告)日：2007-09-11
申请号：US10852470
申请日：2004-05-24
申请人： Janice Chiu , Shahla Khorram , Qiang (Tom) Li
发明人： Janice Chiu , Shahla Khorram , Qiang (Tom) Li
IPC分类号： H04B1/44
摘要： A transceiver front end includes a transmit/receive (T/R) switch, a first balun, a second balun, a low noise amplifier, a power amplifier, and compensation circuitry. The T/R switch is operably coupled to an antenna for receiving inbound radio frequency (RF) signals and for transmitting outbound RF signals. The first balun includes a single ended winding and a differential winding, where the single ended winding is operably coupled to the T/R switch. The second balun includes a single ended winding and a differential winding, where the single ended winding is operably coupled to the T/R switch. The low noise amplifier is operably coupled the differential winding of the first balun. The power amplifier is operably coupled to the differential winding of the second balun. The compensation circuitry is operably coupled to the first balun to compensate for at least one of phase imbalance, amplitude imbalance, and impedance imbalance of the first balun.
摘要翻译： 收发器前端包括发射/接收（T / R）开关，第一平衡 - 不平衡转换器，第二平衡 - 不平衡转换器，低噪声放大器，功率放大器和补偿电路。 T / R开关可操作地耦合到天线，用于接收入站射频（RF）信号和用于发送出站RF信号。 第一个平衡 - 不平衡变压器包括单端绕组和差动绕组，其中单端绕组可操作地耦合到T / R开关。 第二平衡 - 不平衡变压器包括单端绕组和差动绕组，其中单端绕组可操作地耦合到T / R开关。 低噪声放大器可操作地耦合第一平衡 - 不平衡变换器的差动绕组。 功率放大器可操作地耦合到第二巴伦的差动绕组。 补偿电路可操作地耦合到第一平衡 - 不平衡变换器，以补偿第一平衡 - 不平衡变换器的相位不平衡，幅度不平衡和阻抗不平衡中的至少一个。
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公开(公告)号：US20050227655A1
公开(公告)日：2005-10-13
申请号：US10820812
申请日：2004-04-09
申请人： Janice Chiu
发明人： Janice Chiu
CPC分类号： H04B17/318
摘要： A signal strength indicator circuit including a set of rectifiers. The set of rectifiers include an asymmetric switching pair of rectifiers that may be configured to provide an output signal that is inversely proportional to an input signal obtained from a device in a telecommunications system. The pair may be connected directly on one side thereof to a power supply and may be connected on another side thereof to the power supply through a resistor. Also, a method of processing a signal received by a signal strength indicator circuit.
摘要翻译： 一种信号强度指示电路，包括一组整流器。 整流器组包括整流器的非对称开关对，其可被配置为提供与从电信系统中的设备获得的输入信号成反比的输出信号。 该对可以直接在其一侧连接到电源，并且可以通过电阻器将另一侧连接到电源。 而且，一种处理由信号强度指示电路接收的信号的方法。
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公开(公告)号：US07187914B2
公开(公告)日：2007-03-06
申请号：US10820812
申请日：2004-04-09
申请人： Janice Chiu
发明人： Janice Chiu
IPC分类号： H04B17/00
CPC分类号： H04B17/318
摘要： A signal strength indicator circuit including a set of rectifiers. The set of rectifiers include an asymmetric switching pair of rectifiers that may be configured to provide an output signal that is inversely proportional to an input signal obtained from a device in a telecommunications system. The pair may be connected directly on one side thereof to a power supply and may be connected on another side thereof to the power supply through a resistor. Also, a method of processing a signal received by a signal strength indicator circuit.
摘要翻译： 一种信号强度指示电路，包括一组整流器。 整流器组包括整流器的非对称开关对，其可被配置为提供与从电信系统中的设备获得的输入信号成反比的输出信号。 该对可以直接在其一侧连接到电源，并且可以通过电阻器将另一侧连接到电源。 而且，一种处理由信号强度指示电路接收的信号的方法。
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