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    • 2. 发明申请
    • MAGNETIC SENSOR ARRAY HAVING AN ANALOG FREQUENCY-DIVISION MULTIPLEXED OUTPUT
    • 具有模拟频率多路复用输出的磁传感器阵列
    • WO2005114243A3
    • 2006-12-07
    • PCT/US2005016799
    • 2005-05-12
    • UNIV LELAND STANFORD JUNIORWANG SHAN XHAN SHU JEN
    • WANG SHAN XHAN SHU JEN
    • G01R33/00G01N33/543G01R33/09G01R33/12
    • G01R33/09B82Y25/00G01N33/5438G01R33/093G01R33/12G01R33/1269Y10T436/13
    • A magnetic sensor array including magnetoresistive sensor elements having outputs combined by frequency division multiplexing (FDM) is provided. Each sensor element provides an input to a mixer which provides a distinct frequency shift. Preferably, time division multiplexing is also used to combine sensor element outputs. Each sensor element is typically in proximity to a corresponding sample. The sensor elements are preferably subarrays having row and column addressable sensor element pixels. This arrangement provides multiple sensor pixels for each sample under test. Multiplexing of sensor element outputs advantageously reduces readout time. A modulated external magnetic field is preferably applied during operation, to reduce the effect of 1/f noise on the sensor element signals. The effect of electromagnetic interference (EMI) induced by the magnetic field on sensor element signals is advantageously reduced by the mixing required for FDM.
    • 提供了包括具有通过频分复用(FDM)组合的输出的磁阻传感器元件的磁传感器阵列。 每个传感器元件提供输入到提供不同频率偏移的混频器。 优选地,时分复用也用于组合传感器元件输出。 每个传感器元件通常接近相应的样品。 传感器元件优选地具有行和列可寻址传感器元件像素的子阵列。 这种布置为每个被测样品提供了多个传感器像素。 传感器元件输出的多路复用有利于减少读出时间。 优选在操作期间施加调制的外部磁场,以减少1 / f噪声对传感器元件信号的影响。 通过FDM所需的混合有利地减小了由磁场引起的电磁干扰(EMI)对传感器元件信号的影响。