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1. 发明申请

US20070060086A1 CANDIDATE SYSTEM SEARCH AND SOFT HANDOFF BETWEEN FREQUENCIES IN A MULTI-CARRIER MOBILE COMMUNICATION SYSTEM 有权
标题翻译：在多载波移动通信系统中的频率之间的候选系统搜索和软交换
公开(公告)号：US20070060086A1
公开(公告)日：2007-03-15
申请号：US11555656
申请日：2006-11-01
申请人： Tao Chen , Seyfollah Bazarjani , Edward Tiedemann
发明人： Tao Chen , Seyfollah Bazarjani , Edward Tiedemann
IPC分类号： H04B1/18
CPC分类号： H04B7/0491 , H04B7/022
摘要： The present invention encompasses a mobile station comprising a transmitter for transmitting outgoing signals from the mobile station and a receiver for receiving incoming signals, the receiver coupled to the transmitter and having N subreceivers, where N is an integer greater than one and each of the N subreceivers may independently be tuned to a desired frequency. The present invention also encompasses a wireless communication system comprising a plurality of base stations, where each of the base stations transmits signals on at least one of a plurality of frequencies and a plurality of mobile stations, at least one of the plurality of mobile stations comprises a transmitter for transmitting signals to at least one of the plurality of base stations and a receiver coupled to the transmitter for receiving signals from at least one of the plurality of base stations, the receiver having N subreceivers, where N is an integer greater than one and each of the N subreceivers is independently tuned to a desired frequency.
摘要翻译：本发明包括一个移动台，它包括用于从移动台发送输出信号的发射机和用于接收输入信号的接收机，该接收机耦合到该发射机并具有N个子接收机，其中N是大于1的整数，并且N个子接收器可以独立地调谐到期望的频率。本发明还包括一种包括多个基站的无线通信系统，其中每个基站在多个频率和多个移动台中的至少一个上传输信号，多个移动站中的至少一个包括用于向所述多个基站中的至少一个发送信号的发射机和耦合到所述发射机的接收机，用于从所述多个基站中的至少一个基站接收信号，所述接收机具有N个子接收器，其中N是大于1的整数并且N个子接收器中的每一个被独立地调谐到期望的频率。

2. 发明授权

US08238855B2 Candidate system search and soft handoff between frequencies in a multi-carrier mobile communication system 有权
标题翻译：候选系统搜索和多载波移动通信系统中的频率之间的软切换
公开(公告)号：US08238855B2
公开(公告)日：2012-08-07
申请号：US11555656
申请日：2006-11-01
申请人： Tao Chen , Seyfollah Bazarjani , Edward G. Tiedemann, Jr.
发明人： Tao Chen , Seyfollah Bazarjani , Edward G. Tiedemann, Jr.
IPC分类号： H04B7/08
CPC分类号： H04B7/0491 , H04B7/022
摘要： The present invention encompasses a mobile station comprising a transmitter for transmitting outgoing signals from the mobile station and a receiver for receiving incoming signals, the receiver coupled to the transmitter and having N subreceivers, where N is an integer greater than one and each of the N subreceivers may independently be tuned to a desired frequency. The present invention also encompasses a wireless communication system comprising a plurality of base stations, where each of the base stations transmits signals on at least one of a plurality of frequencies and a plurality of mobile stations, at least one of the plurality of mobile stations comprises a transmitter for transmitting signals to at least one of the plurality of base stations and a receiver coupled to the transmitter for receiving signals from at least one of the plurality of base stations, the receiver having N subreceivers, where N is an integer greater than one and each of the N subreceivers is independently tuned to a desired frequency.
摘要翻译：本发明包括一个移动台，它包括用于从移动台发送输出信号的发射机和用于接收输入信号的接收机，该接收机耦合到该发射机并具有N个子接收机，其中N是大于1的整数，并且N个子接收器可以独立地调谐到期望的频率。本发明还包括一种包括多个基站的无线通信系统，其中每个基站在多个频率和多个移动台中的至少一个上传输信号，多个移动站中的至少一个包括用于向所述多个基站中的至少一个发送信号的发射机和耦合到所述发射机的接收机，用于从所述多个基站中的至少一个基站接收信号，所述接收机具有N个子接收器，其中N是大于1的整数并且N个子接收器中的每一个被独立地调谐到期望的频率。

3. 发明授权

US07136648B2 Candidate system search and soft handoff between frequencies in a multi-carrier mobile communication system 有权
标题翻译：候选系统搜索和多载波移动通信系统中的频率之间的软切换
公开(公告)号：US07136648B2
公开(公告)日：2006-11-14
申请号：US10456218
申请日：2003-06-06
申请人： Tao Chen , Seyfollah Bazarjani , Edward G. Tiedemann, Jr.
发明人： Tao Chen , Seyfollah Bazarjani , Edward G. Tiedemann, Jr.
IPC分类号： H04Q7/20
CPC分类号： H04B7/0491 , H04B7/022
摘要： The present invention encompasses a mobile station comprising a transmitter for transmitting outgoing signals from the mobile station and a receiver for receiving incoming signals, the receiver coupled to the transmitter and having N sub receivers, where N is an integer greater than one and each of the N sub receivers may independently be tuned to a desired frequency. The present invention also encompasses a wireless communication system comprising a plurality of base stations, where each of the base stations transmits signals on at least one of a plurality of frequencies and a plurality of mobile stations, at least one of the plurality of mobile stations comprises a transmitter for transmitting signals to at least one of the plurality of base stations and a receiver coupled to the transmitter for receiving signals from at least one of the plurality of base stations, the receiver having N sub receivers, where N is an integer greater than one and each of the N sub receivers is independently tuned to a desired frequency.
摘要翻译：本发明包括一个移动台，该移动台包括用于从移动台发送输出信号的发射机和用于接收输入信号的接收机，该接收机耦合到该发射机并具有N个子接收机，其中N是大于1的整数， N个子接收机可以独立地调谐到期望的频率。本发明还包括一种包括多个基站的无线通信系统，其中每个基站在多个频率和多个移动台中的至少一个上传输信号，多个移动站中的至少一个包括用于向所述多个基站中的至少一个发送信号的发射机和耦合到所述发射机的接收机，用于从所述多个基站中的至少一个基站接收信号，所述接收机具有N个子接收机，其中N是大于 N个子接收机中的一个和每个独立地被调谐到期望的频率。

4. 发明授权

US06606485B1 Candidate system search and soft handoff between frequencies in a multi-carrier mobile communication system 有权
公开(公告)号：US06606485B1
公开(公告)日：2003-08-12
申请号：US09413648
申请日：1999-10-06
申请人： Tao Chen , Seyfollah Bazarjani , Edward G. Tiedemann, Jr.
发明人： Tao Chen , Seyfollah Bazarjani , Edward G. Tiedemann, Jr.
IPC分类号： H04B118
CPC分类号： H04B7/0491 , H04B7/022
摘要： The present invention encompasses a mobile station comprising a transmitter for transmitting outgoing signals from the mobile station and a receiver for receiving incoming signals, the receiver coupled to the transmitter and having N subreceivers, where N is an integer greater than one and each of the N subreceivers may independently be tuned to a desired frequency. The present invention also encompasses a wireless communication system comprising a plurality of base stations, where each of the base stations transmits signals on at least one of a plurality of frequencies and a plurality of mobile stations, at least one of the plurality of mobile stations comprises a transmitter for transmitting signals to at least one of the plurality of base stations and a receiver coupled to the transmitter for receiving signals from at least one of the plurality of base stations, the receiver having N subreceivers, where N is an integer greater than one and each of the N subreceivers is independently tuned to a desired frequency.

5. 发明申请

US20090002075A1 AMPLIFIER WITH CONFIGURABLE DC-COUPLED OR AC-COUPLED OUTPUT 有权
标题翻译：具有可配置直流耦合或交流耦合输出的放大器
公开(公告)号：US20090002075A1
公开(公告)日：2009-01-01
申请号：US12034479
申请日：2008-02-20
申请人： Uma Chilakapati , Anurag Pulincherry , Seyfollah Bazarjani
发明人： Uma Chilakapati , Anurag Pulincherry , Seyfollah Bazarjani
IPC分类号： H03F3/04
CPC分类号： H03F3/20 , H03F3/3022 , H03F3/45192 , H03F3/45475 , H03F3/68 , H03F2200/03 , H03F2203/45101
摘要： A multi-mode amplifier with configurable DC-coupled or AC-coupled output is described. In one design, the multi-mode amplifier includes an amplifier and at least one DC level shifting circuit. The amplifier receives and amplifies an input signal and provides an output signal that is suitable for DC coupling to a load in a DC-coupled mode and for AC coupling to the load in an AC-coupled mode. The at least one DC level shifting circuit performs DC level shifting for at least one (e.g., input and/or output) common-mode voltage of the amplifier and is controlled based on whether the amplifier is operating in the DC-coupled or AC-coupled mode. The amplifier operates between VDD and VNEG supplies in the DC-coupled mode and between VDD and VSS supplies in the AC-coupled mode. The amplifier may include at least one gain stage, an internal DC level shifting circuit, and an output stage.
摘要翻译：描述了具有可配置DC耦合或AC耦合输出的多模放大器。在一种设计中，多模放大器包括放大器和至少一个DC电平移位电路。放大器接收并放大输入信号，并提供适合于DC耦合到DC耦合模式的负载并以AC耦合模式与负载进行AC耦合的输出信号。所述至少一个DC电平移位电路对放大器的至少一个（例如，输入和/或输出）共模电压执行DC电平移位，并且基于放大器是在DC耦合还是AC- 耦合模式。放大器在DC耦合模式下的VDD和VNEG电源之间以及在交流耦合模式下的VDD和VSS电源之间工作。放大器可以包括至少一个增益级，内部DC电平移位电路和输出级。

6. 发明授权

US06407623B1 Bias circuit for maintaining a constant value of transconductance divided by load capacitance 有权
标题翻译：用于保持跨导恒定值除负载电容的偏置电路
公开(公告)号：US06407623B1
公开(公告)日：2002-06-18
申请号：US09773404
申请日：2001-01-31
申请人： Seyfollah Bazarjani , Jeremy Goldblatt
发明人： Seyfollah Bazarjani , Jeremy Goldblatt
IPC分类号： G05F110
CPC分类号： G05F3/205
摘要： A bias circuit is described for use in biasing an operational amplifier to maintain a constant transconductance divided by load capacitance (i.e. a constant gm/CL) despite temperature and process variations and despite body effects. In one example, the bias circuit includes a pair of current source devices and a switched capacitor (SC) equivalent resistor circuit for developing an equivalent resistance between the current source devices. The equivalent resistor circuit includes a sampling capacitor. First and second clock inputs are connected to the capacitor providing non-overlapping clock signals at a predetermined sampling frequency to establish a resistance equivalent. By providing an SC equivalent resistor circuit clocked by non-overlapping fixed clock signals, the gm/CL of the bias circuit is maintained substantially constant. Hence, a fixed bandwidth is maintained within the operational amplifier being biased. When employed in connection with operational amplifiers of an SC circuit, the constant bandwidth enables the SC circuit to operate at a constant switching speed despite temp and process variations. Furthermore, by positioning the resistance equivalent circuit between the current source devices of the bias circuit, voltage differentials between the sources are eliminated thereby removing any threshold voltage mismatch and thus compensating for body effect variations. Other bias circuit examples are also described including a stray insensitive bias circuit and a bias circuit employing three mutually non-overlapping clock signals.
摘要翻译：描述偏置电路用于偏置运算放大器，以保持恒定的跨导除以负载电容（即，恒定的gm / CL），尽管温度和工艺变化以及身体效应。在一个示例中，偏置电路包括一对电流源装置和用于在电流源装置之间产生等效电阻的开关电容器（SC）等效电阻器电路。等效电阻电路包括采样电容器。第一和第二时钟输入连接到电容器，以预定的采样频率提供不重叠的时钟信号以建立电阻等效。通过提供由非重叠固定时钟信号时钟的SC等效电阻电路，偏置电路的gm / CL保持基本恒定。因此，在运算放大器内维持固定带宽被偏置。当与SC电路的运算放大器结合使用时，恒定带宽使得SC电路能够以恒定的开关速度工作，尽管温度和工艺变化。此外，通过将电阻等效电路定位在偏置电路的电流源装置之间，消除源之间的电压差，从而消除任何阈值电压失配，从而补偿体效应变化。还描述了其它偏置电路示例，其包括杂散不敏感偏置电路和采用三个相互不重叠的时钟信号的偏置电路。

7. 发明授权

US07859340B2 Metal-oxide-semiconductor circuit designs and methods for operating same 有权
标题翻译：金属氧化物半导体电路设计及其操作方法
公开(公告)号：US07859340B2
公开(公告)日：2010-12-28
申请号：US12056137
申请日：2008-03-26
申请人： Guoqing Miao , Seyfollah Bazarjani
发明人： Guoqing Miao , Seyfollah Bazarjani
IPC分类号： H02H7/20
CPC分类号： H03F1/14 , H03F1/523 , H03F3/45183
摘要： Complimentary Metal-Oxide-Semiconductor (CMOS) circuits made with core transistors are capable of reliable operation from an IO power supply with voltage that exceeds the reliability limit of the transistors. In embodiments, biasing of an operational amplifier is changed in part to a fixed voltage corresponding to the reliability limit. In embodiments, switched capacitor networks are made with one or more amplifiers and switches including core transistors, but without exposing the core transistors to voltages in excess of their reliability limit. In embodiments, operational transconductance amplifiers (OTAs) include core transistors and operate from IO power supplies. Level shifters for shifting the levels of a power down signal may be used to avoid excessive voltage stress of the OTAs' core transistors during turn-off. Non-level shifting means may be used to clamp output voltages and selected internal voltages of the OTAs, also avoiding excessive voltage stress of the core transistors during turn-off.
摘要翻译：由核心晶体管制成的免费金属氧化物半导体（CMOS）电路能够从具有超过晶体管可靠性限制的电压的IO电源进行可靠的工作。在实施例中，运算放大器的偏置部分地改变为对应于可靠性极限的固定电压。在实施例中，开关电容器网络由包括核心晶体管的一个或多个放大器和开关制成，但是不将核心晶体管暴露于超过其可靠性限制的电压。在实施例中，运算跨导放大器（OTA）包括核心晶体管并且从IO电源操作。用于移动掉电信号电平的电平移位器可以用于避免在关断期间OTAs的核心晶体管的过大的电压应力。可以使用非电平转换装置来钳位OTA的输出电压和选定的内部电压，同时也避免了在关断期间核心晶体管的过大的电压应力。

8. 发明申请

US20100239102A1 DIGITAL FILTERING IN A CLASS D AMPLIFIER SYSTEM TO REDUCE NOISE FOLD OVER 有权
标题翻译： D类放大器系统中的数字滤波，以减少噪音
公开(公告)号：US20100239102A1
公开(公告)日：2010-09-23
申请号：US12407238
申请日：2009-03-19
申请人： Guoqing Miao , Matt Sienko , Seyfollah Bazarjani
发明人： Guoqing Miao , Matt Sienko , Seyfollah Bazarjani
IPC分类号： H04R3/02 , H03G5/00
CPC分类号： H03F3/217 , H03F1/26 , H03M3/504
摘要： An improved power amplifier system is provided. The power amplifier system includes a programmable digital filter and a power amplifier, each responsive to a plurality of frequency response settings and switching frequency settings, respectively. Each frequency response setting and switching frequency setting is adaptively selected by a processor device to match a bandwidth of an incoming audio signal. The processor device identifies the current bandwidth of an incoming audio signal and adaptively selects a switching rate setting and a frequency response setting based on the current bandwidth. The frequency response setting is selected so as to reduce noise fold over in the power amplifier for a corresponding bandwidth, sampling rate setting, and switching frequency setting.
摘要翻译：提供了一种改进的功率放大器系统。功率放大器系统包括可分别响应于多个频率响应设置和开关频率设置的可编程数字滤波器和功率放大器。每个频率响应设置和切换频率设置由处理器设备自适应地选择以匹配输入音频信号的带宽。处理器设备识别输入音频信号的当前带宽，并根据当前带宽自适应地选择切换速率设置和频率响应设置。选择频率响应设置，以便在相应的带宽，采样率设置和开关频率设置下减少功率放大器中的噪声折叠。

9. 发明申请

US20090220110A1 SYSTEM AND METHOD OF REDUCING POWER CONSUMPTION FOR AUDIO PLAYBACK 有权
标题翻译：降低音频播放功耗的系统和方法
公开(公告)号：US20090220110A1
公开(公告)日：2009-09-03
申请号：US12041414
申请日：2008-03-03
申请人： Seyfollah Bazarjani , Guoqing Miao , Joseph R. Fitzgerald , Prajakt V. Kulkarni , Justin Joseph Rosen Gagne , Gene H. McAllister , Jeffrey Hinrichs , Jan Paul van der Wagt
发明人： Seyfollah Bazarjani , Guoqing Miao , Joseph R. Fitzgerald , Prajakt V. Kulkarni , Justin Joseph Rosen Gagne , Gene H. McAllister , Jeffrey Hinrichs , Jan Paul van der Wagt
IPC分类号： H03F21/00
CPC分类号： H03F1/0222 , H03F1/0211 , H03F2200/03 , H03G3/30 , H03G3/3005 , H03G3/32
摘要： A system and method of improving the efficiency in the power consumption of an audio system. In essence, the technique is to adjust the power delivered from the power supply to the analog section, such as the power amplifier, in response to the volume level indicated by the volume control module and/or in response to the detected characteristic of the input audio signal. Thus, in this manner, the analog section is operated in a manner that is related to the level of the signal it is processing. Additionally, the system and method also relate to a technique of adjusting the dynamic ranges of the digital signal and the analog signal to improve the overall dynamic range of the system without needing to consume additional power.
摘要翻译：一种提高音频系统功耗效率的系统和方法。实质上，该技术是根据由音量控制模块指示的音量水平和/或响应于检测到的输入特性来调节从电源传递到模拟部分（例如功率放大器）的功率音频信号。因此，以这种方式，模拟部分以与其正在处理的信号的电平相关的方式操作。此外，该系统和方法还涉及一种调整数字信号和模拟信号的动态范围的技术，以改善系统的整体动态范围，而不需要消耗附加功率。

10. 发明授权

US07415088B2 Multi-standard baseband receiver 有权
标题翻译：多标准基带接收机
公开(公告)号：US07415088B2
公开(公告)日：2008-08-19
申请号：US10123841
申请日：2002-04-15
申请人： Vincenzo Filip Andre Peluso , Seyfollah Bazarjani , Peter Jivan Shah , James Jaffee
发明人： Vincenzo Filip Andre Peluso , Seyfollah Bazarjani , Peter Jivan Shah , James Jaffee
IPC分类号： H04L7/00
CPC分类号： H04B1/16
摘要： Techniques for processing incoming signals conforming to a plurality of standards or communication formats with a single baseband receive section are disclosed. In one aspect, a plurality of analog processing components are adjusted in response to a format select signal, set according to one of a plurality of supported formats or standards. In another aspect, the operating mode of an A/D converter is tuned in response to the format select signal. In yet another aspect, the response characteristics of a jammer filter are tuned in response to the format select signal. In yet another aspect, the adjustment of the plurality of analog processing components is carried out by varying the frequency of a sample clock in response to the format select signal. Various other aspects are also presented. These aspects have the benefit of allowing a single baseband receive section to be deployed to process analog signals conforming to a plurality of communications standards or formats, in a power and area efficient manner.
摘要翻译：公开了用于处理符合多个标准或与单个基带接收部分的通信格式的输入信号的技术。在一个方面，响应于根据多种支持的格式或标准之一设置的格式选择信号来调整多个模拟处理组件。在另一方面，响应于格式选择信号来调整A / D转换器的工作模式。在另一方面，响应于格式选择信号来调谐干扰滤波器的响应特性。在另一方面，通过响应于格式选择信号改变采样时钟的频率来执行多个模拟处理组件的调整。还提出了各种其他方面。这些方面的好处是允许单个基带接收部分以功率和区域有效的方式被部署来处理符合多个通信标准或格式的模拟信号。

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