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41. 发明申请

US20070279129A1 Methods and apparatus to provide slew enhancement for low power amplifiers 有权
标题翻译：为低功率放大器提供转换增强的方法和装置
公开(公告)号：US20070279129A1
公开(公告)日：2007-12-06
申请号：US11451115
申请日：2006-06-12
申请人： Joy Yue Zhang , Rodney T. Burt
发明人： Joy Yue Zhang , Rodney T. Burt
IPC分类号： H03F3/45
CPC分类号： H03F3/45475 , H03F3/45192 , H03F3/72 , H03F2200/471 , H03F2200/513 , H03F2203/45248 , H03F2203/45506 , H03F2203/45618 , H03F2203/45641
摘要： Methods and apparatus to provide increased current to a cascode amplifier to maximize slew rate are disclosed. The amplifier has a first input coupled to an input switch and a load circuit for amplifying an input voltage on the first input. A slewing input voltage to the amplifier is detected. Current is increased to the load circuit to increase the slew rate of an output voltage.
摘要翻译：公开了提供增加的电流到级联放大器以最大化转换速率的方法和装置。放大器具有耦合到输入开关的第一输入端和用于放大第一输入端的输入电压的负载电路。检测到放大器的回转输入电压。电流增加到负载电路以增加输出电压的转换速率。

42. 发明申请

US20070273444A1 Techniques for enabling a 10BT active output impedance line driver using a low power supply 有权
标题翻译：使用低功率电源实现10BT有源输出阻抗线路驱动器的技术
公开(公告)号：US20070273444A1
公开(公告)日：2007-11-29
申请号：US11798294
申请日：2007-05-11
申请人： Ovidiu Bajdechi , Christopher M. Ward
发明人： Ovidiu Bajdechi , Christopher M. Ward
IPC分类号： H03F3/45
CPC分类号： H03F3/45475 , H03F3/45183 , H03F3/4521 , H03F3/45659 , H03F2200/513 , H03F2203/45066 , H03F2203/45116 , H03F2203/45138 , H03F2203/45236 , H03F2203/45522 , H03F2203/45526
摘要： A line driver for generating 10 BT signals is disclosed. Digital symbols to be transmitted via a 10 BT Ethernet line are converted by a digital-to-analog converter into a corresponding analog voltage signal, which is fed into an active output impedance line driver. The digital-to-analog converter also receives a reference voltage reflecting variations of the supply voltage and adjusts its output signal accordingly to provide a deliberately variable analog voltage signal to the line driver.
摘要翻译：公开了一种用于产生10个BT信号的线路驱动器。要通过10 BT以太网线传输的数字符号由数模转换器转换成相应的模拟电压信号，该信号被馈送到有源输出阻抗线路驱动器。数模转换器还接收反映电源电压变化的参考电压，并相应地调整其输出信号，以向线路驱动器提供故意可变的模拟电压信号。

43. 发明授权

US07253686B2 Differential amplifiers with enhanced gain and dynamic range 有权
标题翻译：具有增益增益和动态范围的差分放大器
公开(公告)号：US07253686B2
公开(公告)日：2007-08-07
申请号：US11191871
申请日：2005-07-27
申请人： Ahmed Mohamed Abdelatty Ali
发明人： Ahmed Mohamed Abdelatty Ali
IPC分类号： H03F3/45
CPC分类号： H03F3/4565 , H03F3/45188 , H03F3/45192 , H03F3/45286 , H03F3/45291 , H03F3/45798 , H03F2200/513 , H03F2203/45288 , H03F2203/45301 , H03F2203/45311 , H03F2203/45652 , H03F2203/45722
摘要： Differential amplifier embodiments are provided for amplifying input signals with enhanced gain and dynamic range. They include first and second amplifier stages and at least one common-mode feedback circuit that is arranged to mirror and adjust a tail current to control the common-mode level of a respective one of the stages. The stages are configured with cascode elements to obtain high impedances that enhance their signal gain and the common-mode feedback circuit is configured to controllably lower the output voltage of a current source that provides the tail current to thereby enhance the amplifier's dynamic range. The amplifier embodiments are particularly suited for use in applications where they must operate with reduced supply voltages and operate in alternating operational modes.
摘要翻译：提供差分放大器实施例用于放大具有增强增益和动态范围的输入信号。它们包括第一和第二放大器级以及至少一个共模反馈电路，其布置成镜像和调整尾电流以控制相应一个级的共模电平。这些级配置有共源共栅元件以获得增强其信号增益的高阻抗，并且共模反馈电路被配置为可控地降低提供尾电流的电流源的输出电压，从而增强放大器的动态范围。放大器实施例特别适用于其必须以降低的电源电压工作并以交替工作模式操作的应用。

44. 发明授权

US07245180B2 Intelligent RF power control for wireless modem devices 有权
标题翻译：无线调制解调器设备的智能射频功率控制
公开(公告)号：US07245180B2
公开(公告)日：2007-07-17
申请号：US11161405
申请日：2005-08-02
申请人： Paul Earl , Christopher Hahn
发明人： Paul Earl , Christopher Hahn
IPC分类号： H03G5/16
CPC分类号： H03F3/24 , H03F1/0205 , H03F1/0238 , H03F1/0244 , H03F2200/511 , H03F2200/513
摘要： A bypass circuit is disclosed for use with lower power supply voltage PC cards. The bypass circuit controls the power supply voltage fed to a power amplifier when switching between a lower power 8-PSK modulation mode and a higher power GMSK modulation mode. A step-up DC/DC converter provides a higher voltage to the power amplifier than can be supplied by an original power supply. Switch control logic controls a step-up switch and a battery switch. The step-up switch is turned on when operating in an 8-PSK modulation mode to provide a higher voltage to the power amplifier than the original power supply voltage. The battery switch is turned on when operating in the GMSK modulation mode to provide the original power supply voltage to the power amplifier.
摘要翻译：公开了一种用于较低电源电压PC卡的旁路电路。当在较低功率的8-PSK调制模式和较高功率GMSK调制模式之间切换时，旁路电路控制馈送到功率放大器的电源电压。升压DC / DC转换器为功率放大器提供比原始电源提供的更高的电压。开关控制逻辑控制升压开关和电池开关。当在8-PSK调制模式下工作时，升压开关导通，以向功率放大器提供比原始电源电压更高的电压。在GMSK调制模式下工作时，电池开关处于开启状态，为功率放大器提供原始电源电压。

45. 发明授权

US07205610B2 Source follower circuit or bootstrap circuit, driver circuit comprising such circuit, and display device comprising such driver circuit 有权
公开(公告)号：US07205610B2
公开(公告)日：2007-04-17
申请号：US10808344
申请日：2004-03-25
申请人： Jun Koyama
发明人： Jun Koyama
IPC分类号： H01L27/12
CPC分类号： G09G3/3688 , G09G3/2074 , G09G2330/021 , H01L29/78672 , H03F1/02 , H03F1/223 , H03F3/505 , H03F2200/51 , H03F2200/513
摘要： In the case of using an analog buffer circuit, an input voltage is required to be added a voltage equal to a voltage between the gate and source of a polycrystalline silicon TFT; therefore, a power supply voltage is increased, thus a power consumption is increased with heat. In view of the foregoing problem, the invention provides a depletion mode polycrystalline silicon TFT as a polycrystalline silicon TFT used in an analog buffer circuit such as a source follower circuit. The depletion mode polycrystalline silicon TFT has a threshold voltage on its negative voltage side; therefore, an input voltage does not have to be increased as described above. As a result, a power supply voltage requires no increase, thus a low power consumption of a liquid crystal display device in particular can be realized.

46. 发明授权

US07193465B2 Variable gain amplifier capable of functioning at low power supply voltage 失效
标题翻译：能够在低电源电压下工作的可变增益放大器
公开(公告)号：US07193465B2
公开(公告)日：2007-03-20
申请号：US10964460
申请日：2004-10-12
申请人： Masahiko Ota
发明人： Masahiko Ota
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F2200/513 , H03F2203/45466 , H03F2203/45638 , H03F2203/45641
摘要： A variable gain amplifier contains first and second amplifying elements for signal amplification, which are differentially connected to a first constant current source. Third and fourth amplifying elements for gain control are differentially connected to a signal input terminal connected to a second constant current source. Fifth and sixth amplifying elements for gain control are differentially connected to a signal input terminal connected to a third constant current source. In addition, an output terminal of the first amplifying element is connected to the second constant current source and an output terminal of the second amplifying element is connected to the third constant current source. The first constant current source is connected to a high potential terminal of a power source and the second and third constant current sources are connected to a low potential terminal of the power source.
摘要翻译：可变增益放大器包含用于信号放大的第一和第二放大元件，它们差分地连接到第一恒定电流源。用于增益控制的第三和第四放大元件差分连接到连接到第二恒定电流源的信号输入端子。用于增益控制的第五和第六放大元件差分连接到连接到第三恒流源的信号输入端。此外，第一放大元件的输出端连接到第二恒流源，第二放大元件的输出端连接到第三恒流源。第一恒流源连接到电源的高电位端，第二和第三恒流源连接到电源的低电位端。

47. 发明申请

US20070024364A1 AMPLIFIER AND AMPLIFICATION METHOD 审中-公开
标题翻译：放大器和放大方法
公开(公告)号：US20070024364A1
公开(公告)日：2007-02-01
申请号：US11425753
申请日：2006-06-22
申请人： Akira Yasuda , Toru Ido
发明人： Akira Yasuda , Toru Ido
IPC分类号： H03F3/68
CPC分类号： H03F3/68 , H03F1/02 , H03F3/211 , H03F2200/513
摘要： An amplifier having an increased the upper limit on the amplitude of an audio signal generated between one common terminal and the output terminals of left and right channels without raising the power supply voltage. The level at common terminal C is changed corresponding to the average of the input audio signals (ViL, ViR) to increase the amplitudes of the output audio signals (VL, VR). In this way, the amplitudes of audio signals (VL, VR) supplied to the headphone can be increased compared with the case when the level at terminal C is kept constant. Also, the upper limit on the amplitudes of audio signals (VL, VR) can be increased without raising the power supply voltage.
摘要翻译：放大器具有增加在一个公共端子与左右声道的输出端子之间产生的音频信号的振幅的上限而不增加电源电压。公共端C的电平根据输入音频信号（ViL，ViR）的平均值而变化，以增加输出音频信号（VL，VR）的幅度。以这种方式，与端子C上的电平保持恒定的情况相比，提供给耳机的音频信号（VL，VR）的幅度可以增加。此外，可以在不提高电源电压的情况下增加音频信号（VL，VR）的振幅的上限。

48. 发明授权

US07164317B1 Apparatus and method for a low-voltage class AB amplifier with split cascode 有权
标题翻译：具有分离共源共栅的低压AB类放大器的装置和方法
公开(公告)号：US07164317B1
公开(公告)日：2007-01-16
申请号：US11003299
申请日：2004-12-03
申请人： Perry Scott Lorenz
发明人： Perry Scott Lorenz
IPC分类号： H03F3/45
CPC分类号： H03F1/301 , H03F1/223 , H03F3/347 , H03F3/45179 , H03F3/45219 , H03F2200/513 , H03F2203/45648 , H03F2203/45651
摘要： An op amp is arranged for low-voltage, rail-to-rail operation with a class AB output. The op amp includes a transconductance input stage, a folded cascode middle stage that includes a split cascode, a high-side driver, a low-side driver, a sampling circuit, and a split-cascode bias circuit. The split cascode includes two cascode transistors with their sources coupled to each other. Also, the sampling circuit that is arranged to sample the high-side driver current and the low-side sample current. The split cascode bias current is arranged to compare the sample current with a reference current, and to provide bias voltages to the gates of the two cascode transistors in the split cascode.
摘要翻译：运放用于低压，轨至轨运行，具有AB类输出。运算放大器包括跨导输入级，包括分离共源共栅的折叠共源共栅中间级，高侧驱动器，低侧驱动器，采样电路和分离共源共栅偏置电路。分离共源共栅包括两个共源共栅晶体管，其源极彼此耦合。此外，采样电路被配置为对高侧驱动电流和低侧采样电流进行采样。分离共源共栅偏置电流被布置为将采样电流与参考电流进行比较，并且在分离共源共栅中为两个共源共栅晶体管的栅极提供偏置电压。

49. 发明申请

US20060261891A1 Low voltage CMOS differential amplifier 有权
标题翻译：低电压CMOS差分放大器
公开(公告)号：US20060261891A1
公开(公告)日：2006-11-23
申请号：US11494356
申请日：2006-07-26
申请人： Sugato Mukherjee , Yangsung Joo
发明人： Sugato Mukherjee , Yangsung Joo
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , H03F3/4521 , H03F2200/513 , H03F2200/78 , H03F2203/45101 , H03F2203/45451 , H03K5/2481
摘要： A low voltage CMOS differential amplifier is provided. More specifically, in one embodiment, there is provided a method of manufacturing a device comprising coupling a fixed biased transistor in parallel to a self-biased transistor and configuring the fixed biased transistor and the self-biased transistor to provide a current to a differential amplifier, wherein the fixed biased transistor is configured to provide current to the differential amplifier when the self-biased transistor is operating in a triode or cut-off region.
摘要翻译：提供了一个低电压CMOS差分放大器。更具体地，在一个实施例中，提供了一种制造器件的方法，包括将固定偏置晶体管并联到自偏置晶体管并且配置固定偏置晶体管和自偏置晶体管以向差分放大器提供电流，其中所述固定偏置晶体管被配置为当所述自偏置晶体管在三极管或截止区域中操作时向所述差分放大器提供电流。

50. 发明授权

US07132887B1 Low voltage semi-folded metal oxide semiconductor field effect transistor (MOSFET) amplifier circuit 有权
标题翻译：低压半折金属氧化物半导体场效应晶体管（MOSFET）放大电路
公开(公告)号：US07132887B1
公开(公告)日：2006-11-07
申请号：US10957976
申请日：2004-10-04
申请人： Arlo Aude
发明人： Arlo Aude
IPC分类号： H03F3/45
CPC分类号： H03F3/45192 , H03F3/45183 , H03F3/45475 , H03F2200/513 , H03F2203/45326 , H03F2203/45652
摘要： A low voltage semi-folded metal oxide semiconductor field effect transistor (MOSFET) amplifier circuit for use in a ring oscillator. Operation at a reduced minimum power supply voltage is achieved via a circuit topology with selectively coordinated transistor biasing and channel dimensions.
摘要翻译：用于环形振荡器的低压半折叠金属氧化物半导体场效应晶体管（MOSFET）放大器电路。通过具有选择性协调的晶体管偏置和沟道尺寸的电路拓扑实现在降低的最小电源电压下的操作。

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