Low swap circuit card design for RF power amplifiers

    公开(公告)号:US10700649B2

    公开(公告)日:2020-06-30

    申请号:US16130155

    申请日:2018-09-13

    Abstract: A system and method for using an embedded microprocessor in an RF amplifier. The use of an embedded microprocessor avoids manual calibration. The Microprocessor collects initial amplifier performance data based on a set of parameters and calculates the needed corrections. The microprocessor can change levels within the circuit to achieve those operating points. The embedded microprocessor sets voltage levels with internal circuitry and communicates this information externally through a serial communication port, or the like, to allow a user to communicate with and look at the amplifier data and readjust the internal bias levels, as needed. Thus, the internal microprocessor provides for calibration, self-testing, and monitoring of the RF amplifier and also functions as an in situ bias and temperature compensation controller for use in the presence of temperature variation and provides bias sequencing control to protect against improper applied timing of voltage inputs to the amplifier.

    Nuclear quadrupole resonance system
    2.
    发明授权
    Nuclear quadrupole resonance system 有权
    核四极共振系统

    公开(公告)号:US09476953B1

    公开(公告)日:2016-10-25

    申请号:US13975877

    申请日:2013-08-26

    CPC classification number: G01N24/084 G01N24/10 G01R33/3607 G01R33/3621

    Abstract: A system and method for detecting at least one material under test (MUT) is presented. A Nuclear Quadrupole Resonance (NQR) measurement system includes a waveform generator configured to generate a continuous wave (CW) input signal comprising one or more frequencies. An RF shielded chamber receives the at least one MUT that is carried by a person walking through the chamber. A probe within the chamber illuminates the MUT with the CW signal and simultaneously receives possible NQR emissions from the at least one MUT. A bridge circuit is utilized to cancel the strong excitation CW signal from the generator which would otherwise mask the weak NQR emissions from the MUT that are received and detected by the measurement system. A detector can then detect the MUT based, at least in part, on the resonance signal.

    Abstract translation: 提出了一种用于检测至少一种待测材料(MUT)的系统和方法。 核四极共振(NQR)测量系统包括被配置为产生包括一个或多个频率的连续波(CW)输入信号的波形发生器。 RF屏蔽室接收由走过室的人携带的至少一个MUT。 室内的探头用CW信号照亮MUT,同时接收来自至少一个MUT的可能的NQR发射。 使用桥接电路来消除来自发生器的强激励CW信号,否则该信号将掩蔽来自测量系统接收和检测的MUT的弱NQR发射。 然后,检测器至少部分地基于谐振信号来检测MUT。

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