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  • Implementing IIR Digital Filters
    for 2nd order Infinite Impulse Response (IIR) filters is given. The following type of filters are implemented: ? Low Pass ? High Pass ? Band Pass ? Band Stop (notch) filter This application note does not explain how to design a filter. Filter design theory is well established and is beyond the scope
  • Sensorless BLDC Control with Back-EMF Filtering Using a Majority Function
    phase of the motor is filtered to contributed to its use in an increasing number of determine when to commutate the motor drive applications and at higher power levels. voltages. This control technique excludes the need for The BLDC motor is usually operated with one or more discrete, low-pass
  • Environmental Noise Control Trends in Instrumentation
    . They are much less expensive (usually only a few dollars) and consume a very small current at low voltage. But they have a frequency response that is less well controlled. In recent years a third family of microphones has appeared in the industry: * MEMS microphones: Micro-Electro-Mechanical Systems

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