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  • Product_categories.lvl0:Sensors and MEMS > Bio-Sensors
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  1. Adopting a Better Bioimpedance Analog Front End for Next-Generation Vital Signs Monitoring Devices
    Analog Dialogue

    Yi Xin

    This article introduces the basic concepts, application scenarios, and current pain points of bioimpedance measurement. A new measurement solution is also introduced in this article, and the analog front end (AFE) used in the solution supports outputting sinusoidal sweep stimulus and quadrature demodulation, thereby improving the accuracy and convenience of bioimpedance measurement.
  2. Get a Grip on Battery Life for Your Touch-Sensitive Device
    Technical Articles
    Apr 9, 2021

    Bonnie Baker

    Interested in the latest trend on handheld devices - see what a little squeeze will do.
  3. PPG ID Recommendations - Chest Patch Wearables
    Design Note
    The chest patch wearable helps people to monitor their heart rate.
  4. Penetration Depth Guide For Biosensor Applications
    Technical Articles
    Mar 30, 2018
    Our penetration depth guide will teach various functions of wavelength, the optimal wavelength can be selected for specific biosensor applications.
  5. Rigid-Flex Circuit Design Considerations for Wearable Temperature Sensor Applications
    Technical Articles
    Oct 27, 2023

    Marc Smith

    This article presents rigid-flex circuit board design guidelines for the development of a core body temperature (CBT) sensor device.
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    1. Capacitors not removing DC component after new update.

      Forum Thread
      Answered
      LTspice
      10 May, 2025
      Hi, I wasn't sure where to post this. If I shouldn't post here, please let me know where could I do so. I wanted to let you know of a current bug in the latest LTSpice version. Now, capacitors wont filter DC components unless there's something connected …
      software24.1.7LTspicebug

    2. Feature Request

      Forum Thread
      Answered
      LTspice
      10 May, 2025
      Request a function to auto-generate "fixed" net names. Net names are automatically assigned when a new wire is added to a circuit. However, the net names are dynamically changed when new wires are added. A feature to optionally auto-generate "static" or "fixed" net names that do not change …
      software24.1.x

    3. CFR hard clipping

      Forum Thread
      Answered
      Design Support ADRV9026/ADRV9029
      09 May, 2025
      Regardless of the EVM performance, is it possible to enable only the hard clipping and not enable the other three CFR engines? adi_adrv9025_CfrHardClipperConfig_t cfrHardClipperConfig; cfrHardClipperConfig.cfrHardClipperEnable = 1; cfrHardClipperConfig.txChannelMask = tx_mask; cfrHardClipperConfig.cfrHardClipperThreshold = 0.5; printf("chan: %d th: %f \n", cfrHardClipperConfig.txChannelMask , cfrHardClipperConfig.cfrHardClipperThreshold); if (ADI …
      softwareadrv9025

    4. ADV7513 and CVT RB v2 timings

      Forum Thread
      Answered
      Video
      09 May, 2025
      I'm trying to use ADV7513 on a DE10-nano board with CVT RB v2 timings, but it will only work if I enable DVI mode, so I suppose with the CVT RB v2 timings for the data island are not enough. Is this an expected limitation of the ADV7513?
      hardwareHDMI/DVI Transmittersadv7513HDMI/DVI Devices

    5. Technical Support for AD9576

      Forum Thread
      Answered
      Clock and Timing
      09 May, 2025
      Dear AD Team, We want to use for 10MHz to 16.369MHz conversion operation in My Project. What is hardware configuration needs to follow and software driver to configure the PLL. Is it have any preset configuration needs to follow? How much complexity in the software and we are using …
      Clock Generation and DistributionhardwareClock Distribution Devicesclock and timingAD9576

    6. RXD pin is low when DE&RE is driven High

      Forum Thread
      Answered
      Interface and Isolation
      08 May, 2025
      pins DE and RE are connected together, when transmiting on tx and both pins are high the Rx falls to GND causing frame error at uart. is there a reason for this behavior? is it intended or a bug?
      hardwareadm2483Digital Isolation TechnologyADM2483BRWZIsolated RS-485rs485 transceivers

    7. School Project

      Forum Thread
      Answered
      LTspice
      08 May, 2025
      Design an op amp circuit to perform the following operation: vo = 3.5v1 - 2.5v2. All resistances must be <= 100k. The power supply should be +15V and -15V. Let v1 = 2V and v2 = 1V. I need help designing an op amp on LTSpice for a school project that counts as …
      Operational Amplifiers (Op Amps)simulationsoftware24.1.1LTspice

    8. dma error interrupt

      Forum Thread
      Answered
      ADSP-BF70x
      07 May, 2025
      The HW Refeference Manual tells about a DMA Error IRQ: "The DMA channel has two interrupt signals for support of a number of events such as work-unit state events, peripheralinterrupt request (PIRQ) events, peripheral data request (PDR) events, and DMA channel errors. The channelreports DMA channel errors on a …
      Audio Signal Processorsadsp-bf704Datasheet/SpecsBlackfin Embedded Processors

    9. AD9364 start-up RF spike

      Forum Thread
      Answered
      Design Support AD9361/AD9363/AD9364
      07 May, 2025
      When initialising the AD9364, I see a rather strong RF spike at the expected TX frequency for a few milliseconds (around 0 dBm), which then descends to the expected level.My init sequence after FIR setup, sampling freqs etc is in general terms:SetAfcDefault();SetRxFrequency(rxFreq);SetTxFrequency(txFreq);SetTxAttenuation(txAttn …
      hardwareWideband Transceiver ICrfad9364RF Integrated Transceivers

    10. how to receive undetermined length data through UART?

      Forum Thread
      Answered
      Precision Microcontrollers
      07 May, 2025
      I want to receive data with UART. The data could be 10 byte, 20 byte, 30 byte. COMRX is only 8 bit=1byte. When COMRX is full, it will generate an interrupt, then I'll read COMRX in the interrupt service routine software code. But how can I know the …
      softwaremicrocontrollersPrecision Microcontrollersaducm360

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