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6 条记录 (耗时 0.031 秒)

    Low noise CMOS transmitter circuit with high range of gain
    2.
    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。

    High frequency tunable filter
    3.
    发明授权
    High frequency tunable filter 有权
    高频可调滤波器

    公开(公告)号：US06646498B2

    公开(公告)日：2003-11-11

    申请号：US10026280

    申请日：2001-12-18

    申请人： Ahmed N. Mohieldin ,  Abdellatif Bellaouar ,  Sherif Embabi ,  Michel Frechette

    发明人： Ahmed N. Mohieldin ,  Abdellatif Bellaouar ,  Sherif Embabi ,  Michel Frechette

    IPC分类号： H03K500

    CPC分类号： H03H11/1213 ,  H03B5/04 ,  H03B5/24 ,  H03H11/1286

    摘要： An integrated circuit (ICT) comprising a filter (50). The filter comprises an input (&ugr;in+) for receiving an input signal and an output (56) for producing an output signal having a frequency cutoff point. The filter further comprises at least one resistor network (RN1) coupled between the input and the output. The resistor network comprises a first non-switched resistance (R1.1) and a first resistance series connection connected in parallel with the first non-switched resistance. The first resistance series connection comprises a switched resistance (R1.2) connected in series with a source/drain path of a switching transistor (TRR1.2), the switching transistor having a gate for receiving a control signal. The frequency cutoff point is adjustable in response to the control signal. Additionally, the switched resistance has a first resistance and the switching transistor has an on-resistance. Further, the on-resistance is at least 20 percent of the total of the first resistance and the on-resistance.

    摘要翻译： 一种包括滤波器（50）的集成电路（ICT）。 滤波器包括用于接收输入信号的输入（upsilonin +）和用于产生具有频率截止点的输出信号的输出（56）。 滤波器还包括耦合在输入和输出之间的至少一个电阻网络（RN1）。 电阻网络包括与第一非开关电阻并联连接的第一非开关电阻（R1.1）和第一电阻串联连接。 第一电阻串联包括与开关晶体管（TRR1.2）的源极/漏极路径串联连接的开关电阻（R1.2），开关晶体管具有用于接收控制信号的栅极。 频率截止点可根据控制信号进行调节。 此外，开关电阻具有第一电阻，并且开关晶体管具有导通电阻。 此外，导通电阻是第一电阻和导通电阻的总和的至少20％。

    Direct voltage to PTAT current converter for multiple gain control slope for wide dynamic range VGA
    4.
    发明授权
    Direct voltage to PTAT current converter for multiple gain control slope for wide dynamic range VGA 有权
    直接电压到PTAT电流转换器，用于宽动态范围VGA的多增益控制斜率

    公开(公告)号：US06184723B2

    公开(公告)日：2001-02-06

    申请号：US09261590

    申请日：1999-03-03

    申请人： Michel Frechette ,  Maher A. Abuzaid

    发明人： Michel Frechette ,  Maher A. Abuzaid

    IPC分类号： H03K522

    CPC分类号： H03G1/04

    摘要： A system and method for converting an analog control voltage to a PTAT current. A plurality of differential transistor pairs is provided, each differential pair including a reference transistor and a non-reference transistor, each transistor having a current path and a control electrode. A first output is coupled to a first end of the current path of each of said non-reference transistors and output means is coupled to a first end of the current path of each of the reference transistors. A plurality of current sources is provided, one current source for each differential pair, each current source having a current path coupled to an opposing end of the current path of a different one of the transistor pairs and a control electrode. A PTAT current generator is coupled to the control electrode of each of the current sources. Each differential pair is provided with a pair of electron emitting electrodes coupled together, the current source being coupled to the electron emitting electrodes. The current sources can provide the same or different current outputs. A pair of such circuits can be provided, each with a different slope, with a control determining which circuit output will be provided to the system.

    摘要翻译： 一种用于将模拟控制电压转换为PTAT电流的系统和方法。 提供多个差分晶体管对，每个差分对包括参考晶体管和非参考晶体管，每个晶体管具有电流路径和控制电极。 第一输出耦合到每个所述非参考晶体管的电流路径的第一端，并且输出装置耦合到每个参考晶体管的电流路径的第一端。 提供多个电流源，每个差分对的一个电流源，每个电流源具有耦合到晶体管对的不同一个的电流路径的相对端的电流路径和控制电极。 PTAT电流发生器耦合到每个电流源的控制电极。 每个差分对设置有耦合在一起的一对电子发射电极，电流源耦合到电子发射电极。 电流源可以提供相同或不同的电流输出。 可以提供一对这样的电路，每个具有不同的斜率，控制器确定将哪个电路输出提供给系统。

    Variable gain amplifier having automatic power consumption optimization
    5.
    发明授权
    Variable gain amplifier having automatic power consumption optimization 有权
    具有自动功耗优化的可变增益放大器

    公开(公告)号：US08179198B2

    公开(公告)日：2012-05-15

    申请号：US12840933

    申请日：2010-07-21

    申请人： Abhijit Kumar Das ,  Michel Frechette

    发明人： Abhijit Kumar Das ,  Michel Frechette

    IPC分类号： H03G3/10

    CPC分类号： H03G1/0029 ,  H03F3/45183 ,  H03F2203/45466 ,  H03F2203/45521 ,  H03F2203/45641 ,  H03F2203/45654 ,  H03G7/08

    摘要： A variable gain amplifier may include a master amplifier that may be configured to generate a first current and a diode coupled with the master amplifier so that the first current passes through the diode which, when the first current is passing through the diode, generates a diode voltage signal. According to embodiments, an error amplifier may include a first input configured to receive a gain control voltage signal and a second input configured to receive the diode voltage signal. The output of the error amplifier may provide a feedback signal. The amplifier may include a circuit configured to generate at least one voltage control signal based on the feedback signal and a slave amplifier configured to adjust a gain amount based on the at least one voltage control signal.

    摘要翻译： 可变增益放大器可以包括主放大器，其可以被配置为产生与主放大器耦合的第一电流和二极管，使得第一电流通过二极管，当第一电流通过二极管时，二极管产生二极管 电压信号。 根据实施例，误差放大器可以包括被配置为接收增益控制电压信号的第一输入和被配置为接收二极管电压信号的第二输入。 误差放大器的输出可以提供反馈信号。 放大器可以包括被配置为基于反馈信号生成至少一个电压控制信号的电路和被配置为基于至少一个电压控制信号来调整增益量的从放大器。

    VARIABLE GAIN AMPLIFIER HAVING AUTOMATIC POWER CONSUMPTION OPTIMIZATION
    6.
    发明申请
    VARIABLE GAIN AMPLIFIER HAVING AUTOMATIC POWER CONSUMPTION OPTIMIZATION 有权
    具有自动消耗功率优化的可变增益放大器

    公开(公告)号：US20110210793A1

    公开(公告)日：2011-09-01

    申请号：US12840933

    申请日：2010-07-21

    申请人： Abhijit Kumar Das ,  Michel Frechette

    发明人： Abhijit Kumar Das ,  Michel Frechette

    IPC分类号： H03F3/45

    CPC分类号： H03G1/0029 ,  H03F3/45183 ,  H03F2203/45466 ,  H03F2203/45521 ,  H03F2203/45641 ,  H03F2203/45654 ,  H03G7/08

    摘要： A variable gain amplifier may include a master amplifier that may be configured to generate a first current and a diode coupled with the master amplifier so that the first current passes through the diode which, when the first current is passing through the diode, generates a diode voltage signal. According to embodiments, an error amplifier may include a first input configured to receive a gain control voltage signal and a second input configured to receive the diode voltage signal. The output of the error amplifier may provide a feedback signal. The amplifier may include a circuit configured to generate at least one voltage control signal based on the feedback signal and a slave amplifier configured to adjust a gain amount based on the at least one voltage control signal.

    摘要翻译： 可变增益放大器可以包括主放大器，其可以被配置为产生与主放大器耦合的第一电流和二极管，使得第一电流通过二极管，当第一电流通过二极管时，二极管产生二极管 电压信号。 根据实施例，误差放大器可以包括被配置为接收增益控制电压信号的第一输入和被配置为接收二极管电压信号的第二输入。 误差放大器的输出可以提供反馈信号。 放大器可以包括被配置为基于反馈信号生成至少一个电压控制信号的电路和被配置为基于至少一个电压控制信号来调整增益量的从放大器。