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  • Examining a New In-Amp Architecture for Communication Satellites
    With more 500 conventional sensors monitoring the condition and performance of various subsystems on a medium sized spacecraft, there is a growing need for precision radiation tolerant instrumentation amplifiers. This white paper introduces a new architecture for radiation tolerant in-amps
  • Voltage Divider or Op Amp Circuit -- Which Should You Choose?
    Many engineers wonder about the best circuit to drive a FlexiForce TM sensor in an embedded design? If you've browsed our standard FlexiForce sensors recently, you'll notice that we recommend an Inverting Op Amp circuit. However, it is possible to power your FlexiForce sensor with many analog
  • Oscillator Circuits For RTD Temperature Sensors
    This application note shows how to design a temperature sensor oscillator circuit using Microchip's low-cost MCP6001 operational amplifier (op amp) and the MCP6541 comparator. Oscillator circuits can be used to provide an accurate temperature measurement with a Resistive Temperature Detector (RTD
  • How to Monitor Sensor Health with Instrumentation Amplifiers
    filters out the common mode voltage and delivers the differential voltage. This white paper discusses the basics of a three op amp INA and examines the advantages of zero-drift amplifiers, RFI input filters, monitoring sensor health and programmable gain amplifiers. We also review application examples
  • Designing Operational Amplifier Oscillator Circuits For Sensor Applications
    Operational amplifier (op amp) oscillators can be used to accurately measure resistive and capacitive sensors. Oscillator design can be simplified by using the procedure discussed in this application note. The derivation of the design equations provides a method to select the passive components
  • Amplifying High-Impedence Sensors ? Photodiode Example
    amps, is broken down into four design steps: DC, stability compensation, closed-loop gain and noise This design step sets the DC gain and bias point to reduction. ensure proper operation. It also addresses DC offsets. A design using a PIN photodiode (light detector) illus- High-impedance sensors have
  • Detecting Small Capacitive Sensors Using the MCP6291 and PIC16F690 Devices
    This application note shows how to use a PICmicro (R) microcontroller and minimal external circuitry to detect small capacitances. The design is based on an operational amplifier (op amp) integrator. A capacitive humidity sensor is used to illustrate this type of application. The design is measured
  • A Guide to Using FETS for Sensor Applications
    In particular, low noise JFETs exhibit low input gate currents that are desirable when working with high impedance devices at the input or with high value feedback resistors (e.g., >=1M ). Operational amplifiers (op amps) with bipolar transistor input stages have much higher input noise currents

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