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    • 4. 发明授权
    • Variable gain amplifier
    • 可变增益放大器
    • US07199660B2
    • 2007-04-03
    • US10730832
    • 2003-12-08
    • Chong Ki KwonGyu Hyung ChoMun Yang ParkJong Dae Kim
    • Chong Ki KwonGyu Hyung ChoMun Yang ParkJong Dae Kim
    • H03F3/45
    • H03F3/45179H03G1/0023
    • Disclosed is a CMOS variable gain amplifier (VGA). The variable gain amplifier comprises a voltage-current converter for converting voltages of a wide input range into currents, a current shared circuit for receiving the currents from the voltage-current converter and controlling values of output currents depending on first and second control voltages, and a current-voltage converter for converting the output currents from the current shared circuit into differential voltages depending on a bias voltage in order to obtain a variable gain. The voltage amplifier having a variable gain is provided by controlling the value of the output current of the drain terminal against the gate voltage of the NMOS transistor constituting the current shared circuit. Therefore, an integrated circuit (IC) type variable gain amplifier operating a high speed at a low supply voltage can be obtained.
    • 公开了一种CMOS可变增益放大器(VGA)。 可变增益放大器包括用于将宽输入范围的电压转换为电流的电压 - 电流转换器,用于接收来自电压 - 电流转换器的电流的电流共享电路,以及根据第一和第二控制电压控制输出电流的值;以及 电流 - 电压转换器,用于根据偏置电压将来自当前共享电路的输出电流转换成差分电压,以获得可变增益。 具有可变增益的电压放大器是通过根据构成当前共享电路的NMOS晶体管的栅极电压控制漏极端子的输出电流的值来提供的。 因此,可以获得在低电源电压下高速运行的集成电路(IC)型可变增益放大器。
    • 5. 发明授权
    • Variable gain amplifier
    • 可变增益放大器
    • US06989716B2
    • 2006-01-24
    • US10732720
    • 2003-12-09
    • Chong Ki KwonGyu Hyung ChoMun Yang ParkJong Dae Kim
    • Chong Ki KwonGyu Hyung ChoMun Yang ParkJong Dae Kim
    • H03F3/45
    • H03G1/0023H03F3/4508
    • Disclosed is a variable gain amplifier having low voltage, low distortion, high linearity and wideband operating characteristics. The variable gain amplifier comprises an input signal provision and variable gain controller for receiving first and second input signals via a differential pair of a cascode shape and amplifying a difference signal of the first and second input signals to output first and second differential signals, wherein the controller controls a variable voltage gain of the difference signal according to a gain control voltage signal, and a current/voltage converter for receiving the first and second differential signals outputted from the input signal provision and variable gain controller and converting the first and second differential signals into first and second output voltages of a voltage inputted type depending on first and second bias voltages, wherein the input signal provision and variable gain controller has a construction of a current inputted type or a voltage inputted type along with negative feedback connection.
    • 公开了具有低电压,低失真,高线性度和宽带工作特性的可变增益放大器。 可变增益放大器包括输入信号提供和可变增益控制器,用于通过级联形状的差分对接收第一和第二输入信号,并且放大第一和第二输入信号的差分信号以输出第一和第二差分信号,其中, 控制器根据增益控制电压信号控制差分信号的可变电压增益;以及电流/电压转换器,用于接收从输入信号提供和可变增益控制器输出的第一和第二差分信号,并将第一和第二差分信号 根据第一和第二偏置电压,输入电压输入型的第一和第二输出电压,其中输入信号提供和可变增益控制器具有电流输入类型或电压输入类型以及负反馈连接的结构。
    • 6. 发明授权
    • Variable gain amplifier
    • 可变增益放大器
    • US07046089B2
    • 2006-05-16
    • US10731610
    • 2003-12-08
    • Chong Ki KwonGyu Hyung ChoMun Yang ParkJong Dae Kim
    • Chong Ki KwonGyu Hyung ChoMun Yang ParkJong Dae Kim
    • H03F3/45
    • H03G1/0029H03F1/3211H03F3/45188H03F2203/45288H03F2203/45398H03F2203/45702
    • Disclosed is a CMOS variable gain amplifier. The variable gain amplifier comprises a first means for first and second differential input voltages, a second means for controlling its transconductance to generate an output current according to a control voltage, a third means for a bias voltage to generate bias current by current mirror, and to supply a stabilized bias current to the second means using the replica current, and a fourth means for generating an output voltage with a variable gain according to control voltage by its output current generated in the second means. Therefore, the present invention provides a function of controlling low distortion and high linearity in low voltage and a high-speed operation by the supply of a stabilized sharing current bias, and can control a voltage gain in a wide range by the control voltage.
    • 公开了一种CMOS可变增益放大器。 可变增益放大器包括用于第一和第二差分输入电压的第一装置,用于根据控制电压控制其跨导以产生输出电流的第二装置,用于由电流镜产生偏置电流的偏置电压的第三装置,以及 使用复制电流向第二装置提供稳定的偏置电流;以及第四装置,用于根据控制电压通过其在第二装置中产生的输出电流产生具有可变增益的输出电压。 因此,本发明提供了通过提供稳定的共享电流偏压来控制低电压和高速操作的低失真和高线性度的功能,并且可以通过控制电压来控制宽范围内的电压增益。