CLOSED-LOOP DIGITAL POWER CONTROL FOR A WIRELESS TRANSMITTER
    3.
    发明公开
    CLOSED-LOOP DIGITAL POWER CONTROL FOR A WIRELESS TRANSMITTER 有权
    闭环FOR一座无线电台数字电源控制

    公开(公告)号:EP2102992A1

    公开(公告)日:2009-09-23

    申请号:EP07855632.1

    申请日:2007-12-21

    申请人: Icera Canada ULC

    IPC分类号: H04B1/40 H04B7/005

    CPC分类号: H03G3/3047 H04B2001/0416

    摘要: A closed loop power output calibration system for variable power output wireless devices. The wireless device includes a wireless transceiver having a transmit core coupled to a discrete power amplifier. Power detection circuitry formed in the wireless transceiver provides a detected power level of the power amplifier, and a reference power level, both of which are converted to digital signals using existing I and Q signal analog to digital converters in the receiver core. The digital signals are processed to cancel power distortion and temperature effects to provide a resulting power feedback signal. Corrective control signals are generated in response to the power feedback signal relative to a desired power output level. The gain in the transmit core is then adjusted in response to the corrective control signals such that the power amplifier outputs the target output power level.

    CURRENT CONTROLLED BIASING FOR CURRENT-STEERING BASED RF VARIABLE GAIN AMPLIFIERS
    4.
    发明公开
    CURRENT CONTROLLED BIASING FOR CURRENT-STEERING BASED RF VARIABLE GAIN AMPLIFIERS 审中-公开
    电流型工作项目设置可变增益设置RF放大器

    公开(公告)号:EP2097985A1

    公开(公告)日:2009-09-09

    申请号:EP07855611.5

    申请日:2007-12-20

    申请人: Icera Canada ULC

    IPC分类号: H04B1/04 H04B7/005

    CPC分类号: H03G3/3042 H03G1/04

    摘要: An adaptive current control circuit for reduced power consumption and minimized gain shift in a variable gain amplifier. An automatic gain control circuit provides gain control voltages in response to a gain control signal. The gain control voltages are used by the variable gain amplifier to set the gain of the output signal for wireless transmit operations. The adaptive current control circuit receives the same gain control voltages for reducing current to the variable gain amplifier during low gain operation, while providing higher currents during high gain operation. The current that is provided is a hybrid mix of proportional to absolute temperature (PTAT) current and complementary to absolute temperature (CTAT) current for minimizing temperature effects on the gain. The ratio of PTAT current and CTAT current is adjustable for specific temperature ranges to further minimize temperature effects on the gain.

    CMOS TEMPERATURE COMPENSATED TRANSMITTER CIRCUIT WITH MERGED MIXER AND VARIABLE GAIN AMPLIFIER
    6.
    发明授权
    CMOS TEMPERATURE COMPENSATED TRANSMITTER CIRCUIT WITH MERGED MIXER AND VARIABLE GAIN AMPLIFIER 有权
    用旋转CMOS温度补偿的发射器电路倒塌可变增益放大器

    公开(公告)号:EP2016675B1

    公开(公告)日:2012-04-04

    申请号:EP07719624.4

    申请日:2007-04-24

    申请人: Icera Canada ULC

    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 85dB.

    Low noise CMOS transmitter circuit with high range of gain
    10.
    发明公开
    Low noise CMOS transmitter circuit with high range of gain 审中-公开
    Rauscharme CMOS-Übertragungsschaltungmit hohemVerstärkungsbereich

    公开(公告)号:EP2469706A2

    公开(公告)日:2012-06-27

    申请号:EP12156934.7

    申请日:2007-04-24

    申请人: Icera Canada ULC

    摘要: The invention provides a method for controlling signal transmission gain in response to an input control signal comprising: a) receiving the input control signal; b) generating in response to temperature, a temperature compensated control voltage corresponding to the input control signal; c) linearizing the temperature compensated control voltage for generating a gain control voltage; and, d) controlling a gain circuit in sub-threshold in response to the gain control voltage.

    摘要翻译: 本发明提供一种响应于输入控制信号来控制信号传输增益的方法,包括:a)接收输入控制信号; b)响应于温度产生对应于输入控制信号的温度补偿控制电压; c)线性化用于产生增益控制电压的温度补偿控制电压; 以及d)响应于所述增益控制电压控制次阈值中的增益电路。