CURRENT MEASUREMENT
    4.
    发明公开
    CURRENT MEASUREMENT 审中-公开

    公开(公告)号:EP3736578A2

    公开(公告)日:2020-11-11

    申请号:EP20181782.2

    申请日:2012-09-12

    摘要: The present disclosure relates to apparatus and methods for determining a transfer function of a current measurement arrangement (118), or a change in a transfer function of the current measurement arrangement. In one aspect, an apparatus is disclosed comprising: a signal source (112) configured to apply a reference signal to a first current transducer (110) such that a first transducer output signal from the first current transducer comprises: a current measurement signal indicative of the first current passing through a first conductor (104); and a reference signal component resulting from the reference signal; and signal processing circuitry (116)configured to determine the transfer function of the current measurement arrangement by: extracting the reference signal component from the first transducer output signal; and determining the transfer function of the current measurement arrangement based on the transducer output signal.

    MULTI-CORE MIXERS WITH LOCAL OSCILLATOR LEAKAGE COMPENSATION

    公开(公告)号:EP3637616A1

    公开(公告)日:2020-04-15

    申请号:EP19201690.5

    申请日:2019-10-07

    IPC分类号: H03D7/14

    摘要: Systems and methods are disclosed for compensating local oscillator leakage in a mixer. An example mixer includes a first double-balanced mixer core and a second double-balanced mixer. The first double-balanced mixer may comprise differential output nodes and may be configured to mix a first input signal with a first local oscillator signal. The second double-balanced mixer core may comprise second differential output nodes and may be configured to mix a second input signal with a second local oscillator signal. The second input signal may be approximately 180° out of phase with the first input signal. The second local oscillator signal may be approximately 180° out of phase with the first local oscillator signal. The differential output nodes may be electrically connected to the second differential output nodes, and the first double-balanced mixer core and the second double-balanced mixer core may be arranged to compensate for local oscillator leakage.