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36 条记录 (耗时 0.014 秒)

    Constant transductance input stage and integrated circuit implementations thereof
    21.
    发明授权
    Constant transductance input stage and integrated circuit implementations thereof 失效
    恒定转换输入级及其集成电路实现

    公开(公告)号：US5714906A

    公开(公告)日：1998-02-03

    申请号：US514910

    申请日：1995-08-14

    申请人： Ali Motamed ,  Chang Ku Hwang ,  Mohammed Ismail

    发明人： Ali Motamed ,  Chang Ku Hwang ,  Mohammed Ismail

    IPC分类号： H03F3/30 ,  H03F3/45

    CPC分类号： H03F3/4521 ,  H03F3/3023 ,  H03F3/3067 ,  H03F3/45112 ,  H03F3/45219 ,  H03F2200/162 ,  H03F2203/45371 ,  H03F2203/45388 ,  H03F2203/45392

    摘要： A low voltage constant transconductance input stage is achieved with relatively simple design methodology. The approach uses current-mode techniques and is based upon the processing of signal currents, rather than handling the bias currents of input stages. Such an approach becomes universal and independent of the input stage transistor types (FET or bipolar) and their operating regions. Further, the arrangement considerably simplifies the design procedure of low voltage operational amplifiers. MOS and bipolar Op Amp input stages are described wherein almost constant g.sub.m is achieved which is independent of the common mode input voltage ranging from rail-to-rail.

    摘要翻译： 使用相对简单的设计方法实现低电压恒定跨导输入级。 该方法使用电流模式技术，并且基于信号电流的处理，而不是处理输入级的偏置电流。 这种方法变得通用且独立于输入级晶体管类型（FET或双极型）及其工作区域。 此外，该布置大大简化了低压运算放大器的设计过程。 描述MOS和双极性运算放大器输入级，其中实现几乎恒定的gm，其独立于从轨至轨的共模输入电压。

    Linear amplifier
    22.
    发明授权
    Linear amplifier 失效
    线性放大器

    公开(公告)号：US5699014A

    公开(公告)日：1997-12-16

    申请号：US627403

    申请日：1996-04-04

    申请人： Paul A. Haefner ,  William J. Linder

    发明人： Paul A. Haefner ,  William J. Linder

    IPC分类号： H03F1/32 ,  H03F3/45

    CPC分类号： H03F1/3211 ,  H03F1/3205 ,  H03F2200/162 ,  H03F2200/372

    摘要： A low-noise, low-power complementary metal-oxide-semiconductor (CMOS) integrated circuit common source differential amplifier is disclosed which is capable of amplifying low amplitude cardiac signals such as those produced by atrial depolarization of the heart. The amplifier has a pair of large area p-channel input field-effect transistors (FETs) biased in weak inversion. The amplifier also has active load FETs biased in the nonsaturation (linear) region by means of a varying gate terminal voltage applied by a dynamic bias circuit. The gate terminal voltage is varied to match the temperature dependence of the output conductance of the load FETs to the temperature dependence of the transconductance of the input FETs. The gate terminal voltage also sets a dc bias point which uses the nonlinearity in the load FET output conductance to cancel nonlinearity in the input FET transconductance.

    摘要翻译： 公开了一种低噪声，低功率互补金属氧化物半导体（CMOS）集成电路公共源差分放大器，其能够放大低振幅心脏信号，例如通过心脏去极化产生的心脏信号。 放大器具有一对在弱反相中偏置的大面积p沟道输入场效应晶体管（FET）。 放大器还通过由动态偏置电路施加的变化的栅极端子电压而在非饱和（线性）区域中偏置有有源负载FET。 栅极端子电压变化以匹配负载FET的输出电导的温度依赖性与输入FET的跨导的温度依赖性。 栅极端子电压还设置直流偏置点，其使用负载FET输出电导中的非线性来消除输入FET跨导中的非线性。

    Constant transconductance bias circuit and method
    23.
    发明授权
    Constant transconductance bias circuit and method 失效
    恒定跨导偏置电路及方法

    公开(公告)号：US5384548A

    公开(公告)日：1995-01-24

    申请号：US111708

    申请日：1993-08-25

    申请人： Satoshi Sakurai ,  Mohammed Ismail

    发明人： Satoshi Sakurai ,  Mohammed Ismail

    IPC分类号： H03F3/345 ,  H03F3/45

    CPC分类号： H03F3/345 ,  H03F3/4521 ,  H03F3/45708 ,  H03F2200/162 ,  H03F2203/45508

    摘要： The reduction of the power supply voltage of VLSI circuits to 3.3 volts results in a significant loss in input and output swing in traditional CMOS analog circuits. In order to achieve rail-to-rail operation, n-channel and p-channel MOSFETs are placed in parallel so that at least one type of transistors are operating in a high gain region throughout the entire input range. However, circuit characteristics change as transistors turn on and off. A constant transconductance bias means enables the rail-to-rail CMOS differential stage to possess a constant transconductance over the entire common mode voltage range. Significantly, the bias circuit does not require any matching between the transistors of opposite types.

    摘要翻译： 将VLSI电路的电源电压降低至3.3伏，导致传统CMOS模拟电路的输入和输出摆​​幅明显下降。 为了实现轨到轨操作，n沟道和p沟道MOSFET并联放置，使得至少一种类型的晶体管在整个输入范围内的高增益区域中工作。 然而，晶体管导通和关断时，电路特性会发生变化。 恒定的跨导偏置装置使得轨到轨CMOS差分级能够在整个共模电压范围内具有恒定的跨导。 重要的是，偏置电路不需要相反类型的晶体管之间的任何匹配。

    Low voltage low power class A/B output stage
    26.
    发明授权
    Low voltage low power class A/B output stage 有权
    低电压低功耗级A / B输出级

    公开(公告)号：US07327194B2

    公开(公告)日：2008-02-05

    申请号：US11290286

    申请日：2005-11-30

    申请人： Chin Sing Li

    发明人： Chin Sing Li

    IPC分类号： H03F3/26

    CPC分类号： H03F3/3022 ,  H03F3/21 ,  H03F3/347 ,  H03F3/45183 ,  H03F3/45188 ,  H03F2200/162 ,  H03F2200/513 ,  H03F2203/45644

    摘要： A CMOS class A/B output stage provides the advantages of high speed operation, low supply voltage requirements, and low quiescent current draw, resulting from the use of subthreshold biasing of the output driver transistors. The architecture of the output stage makes it particularly suitable for use in operational amplifiers in power demanding applications, such as portable instruments, smoke detectors, sensors, or the like.

    摘要翻译： CMOS级A / B输出级提供了由于使用输出驱动晶体管的阈值偏置而导致的高速运行，低电源电压要求和低静态电流消耗的优点。 输出级的架构使其特别适合于在诸如便携式仪器，烟雾探测器，传感器等的电力需求应用中的运算放大器中使用。

    Low noise CMOS transmitter circuit with high range of gain
    27.
    发明申请
    Low noise CMOS transmitter circuit with high range of gain 有权
    低噪声CMOS发射电路具有高增益范围

    公开(公告)号：US20070249303A1

    公开(公告)日：2007-10-25

    申请号：US11409092

    申请日：2006-04-24

    申请人： Abdellatif Bellaouar ,  Michel Frechette

    发明人： Abdellatif Bellaouar ,  Michel Frechette

    IPC分类号： H01Q11/12 ,  H04B1/28

    CPC分类号： H03G1/04 ,  H03F1/26 ,  H03F3/24 ,  H03F3/347 ,  H03F3/45071 ,  H03F2200/162 ,  H03F2200/447

    摘要： A CMOS automatic gain control (AGC) circuit that receives an analog control voltage and generates a temperature compensated gain voltage to linearly control the gain of a variable gain circuit operating in the sub-threshold region. A PTAT circuit having a resistor network coupled to a current mirror circuit operating in the sub-threshold region establishes a current having an proportional relationship to temperature. This current is used as a supply for a voltage to voltage converter circuit which generates an intermediate voltage in response to the analog control voltage. A linearizing circuit operating in the sub-threshold region pre-conditions the intermediate voltage, which is then applied to a variable gain circuit. The variable gain circuit is operated in the sub-threshold region, and the preconditioned intermediate voltage will control the amount of gain to be substantially linear with respect to the analog control voltage, and with a range of about 85 dB.

    摘要翻译： 一种CMOS自动增益控制（AGC）电路，其接收模拟控制电压并产生温度补偿增益电压，以线性地控制在子阈值区域中工作的可变增益电路的增益。 具有耦合到在次阈值区域中工作的电流镜电路的电阻网络的PTAT电路建立与温度成比例关系的电流。 该电流用作电压到电压转换器电路的电源，该电压对电压转换器电路响应于模拟控制电压产生中间电压。 在亚阈值区域中操作的线性化电路预先规定中间电压，然后将其施加到可变增益电路。 可变增益电路在子阈值区域中工作，并且预处理的中间电压将控制增益量相对于模拟控制电压基本上线性，并且在约85dB的范围内。

    AMPLIFIER CIRCUIT IMPROVED IN LINEARITY AND FREQUENCY BAND
    28.
    发明申请
    AMPLIFIER CIRCUIT IMPROVED IN LINEARITY AND FREQUENCY BAND 失效
    线性和频带改进的放大器电路

    公开(公告)号：US20070200631A1

    公开(公告)日：2007-08-30

    申请号：US11464660

    申请日：2006-08-15

    申请人： Tae Kim ,  Bonkee Kim ,  Kwyro Lee

    发明人： Tae Kim ,  Bonkee Kim ,  Kwyro Lee

    IPC分类号： H03F1/22 ,  H03F3/04

    CPC分类号： H03F1/34 ,  H03F1/223 ,  H03F1/3205 ,  H03F2200/162 ,  H03F2200/36 ,  H03F2200/366 ,  H03F2200/432

    摘要： An amplifier circuit improved in linearity and frequency band comprises an amplification block, a feedback block and an output block. The amplification block comprises a main transistor, an auxiliary transistor, a first capacitor, a second capacitor, a main transistor bias unit, and an auxiliary transistor bias unit. The main transistor bias unit comprises a first bias resistor. The auxiliary transistor bias unit comprises a second bias resistor. The feedback block comprises first and second feedback resistors, and the output block comprises an output resistor and an output transistor.

    摘要翻译： 线性度和频带改善的放大器电路包括放大块，反馈块和输出块。 放大块包括主晶体管，辅助晶体管，第一电容器，第二电容器，主晶体管偏置单元和辅助晶体管偏置单元。 主晶体管偏置单元包括第一偏置电阻器。 辅助晶体管偏置单元包括第二偏置电阻器。 反馈块包括第一和第二反馈电阻器，并且输出块包括输出电阻器和输出晶体管。

    High Sensitivity RFID TAG Integrated Circuits
    29.
    发明申请
    High Sensitivity RFID TAG Integrated Circuits 审中-公开
    高灵敏度RFID标签集成电路

    公开(公告)号：US20070046369A1

    公开(公告)日：2007-03-01

    申请号：US11459339

    申请日：2006-07-22

    申请人： Robert Schober ,  Ion Opris ,  Francois Krummenacher

    发明人： Robert Schober ,  Ion Opris ,  Francois Krummenacher

    IPC分类号： H03F21/00

    CPC分类号： H03F3/195 ,  G06K19/0707 ,  G06K19/0713 ,  G06K19/0723 ,  H03F1/0205 ,  H03F1/223 ,  H03F3/70 ,  H03F21/00 ,  H03F2200/162 ,  H03F2200/513

    摘要： A method and apparatus for an ultra-high sensitivity, low cost, passive (no battery) low-power energy harvesting data transmitting circuit energy, such as a RFID (Radio Frequency IDentification) tag integrated circuit “chip.” By using combinations of special purpose design enhancements, the low-power energy harvesting passive data transmitting circuit, such as the RFID tag chip, operates in the sub-microwatt power range. The chip power should be derived from a low-microwatt per square centimeter RF field radiated to the RFID tag antenna from the tag reader (interrogator) or derived from a suitable low signal source, such as a sonic transducer (e.g., a piezoelectric transducer or a low level DC source, such as a bimetallic or chemical source).

    摘要翻译： 一种用于超高灵敏度，低成本，无源（无电池）低功率能量采集数据传输电路能量的方法和装置，例如RFID（射频识别）标签集成电路“芯片”。 通过使用特殊设计增强功能的组合，低功率能量采集无源数据传输电路（如RFID标签芯片）在亚微瓦功率范围内工作。 芯片功率应来自于从标签读取器（询问器）辐射到RFID标签天线的低平方厘米RF场的低微瓦，或者衍生自合适的低信号源，例如声音换能器（例如，压电换能器或 低级DC源，例如双金属或化学源）。