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    • 3. 发明申请
    • WIRELESS SENSOR PLATFORM FOR HARSH ENVIRONMENTS
    • 无线传感器平台的HARH环境
    • US20090205436A1
    • 2009-08-20
    • US12407348
    • 2009-03-19
    • STEVEN L. GARVERICKXINYU YU
    • STEVEN L. GARVERICKXINYU YU
    • G01B7/16
    • G01L19/086G01L1/2256
    • An amplifier system can include an input amplifier configured to receive an analog input signal and provide an amplified signal corresponding to the analog input signal. A tracking loop is configured to employ delta modulation for tracking the amplified signal, the tracking loop providing a corresponding output signal. A biasing circuit is configured to adjust a bias current to maintain stable transconductance over temperature variations, the biasing circuit providing at least one bias signal for biasing at least one of the input amplifier and the tracking loop, whereby the circuitry receiving the at least one bias signal exhibits stable performance over the temperature variations. In another embodiment the biasing circuit can be utilized in other applications.
    • 放大器系统可以包括输入放大器,其被配置为接收模拟输入信号并提供对应于模拟输入信号的放大信号。 跟踪环路被配置为采用增量调制来跟踪放大的信号,跟踪环路提供相应的输出信号。 偏置电路被配置为调整偏置电流以保持跨越温度变化的稳定跨导,偏置电路提供至少一个偏置信号以偏置输入放大器和跟踪环路中的至少一个,由此接收至少一个偏置的电路 信号在温度变化方面表现出稳定的性能。 在另一实施例中,偏置电路可用于其它应用。