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Discussion in 'Electronic Basics' started by sweet&soft, May 21, 2008.

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  1. sweet&soft

    sweet&soft Guest

    Circuit measures true-rms and average value
    The circuit measures both the true-rms value and the
    rectified average value of an ac signal.This design uses
    two low-cost ICs
    Operating from a single 5V supply, the circuit has an
    input dynamic range of less than 30 mV to greater than 3V rms.

    RMS-to-dc converter Circuit is accurate and stable
    The circuit uses a low-cost analog multiplier, IC1; an
    integrator, IC3A, R5, and C1; and an analog inverter, IC2, R3, R4,
    and D1 to convert the analog VIN into a true-rms dc VOUT.
    The input signal can be ac, dc, or a combination. With an
    input-signal range of 0 to 2V, the circuit can handle ac signals
    with crest factors up to 5

    True RMS Detector Circuit
    The op amp precision rectifier circuits have greatly eased
    The problems of AC to DC conversion. It is possible to measure
    millivolt AC signal with a DC meter with better than 1%
    accuracy. Inaccuracy due to diode turn-on and nonlinearity is
    eliminated, and precise rectification of low level signals isobtained

    Extend RMS-To-DC Converter's Range
    The AD736 rms-to-dc converter is a 1-V, full-scale device.
    Voltage comparator IC3 can increase the full-scale input range to
    10 V automatically. When the rms-to-dc operating range is exceeded
    , the comparator's hysteresis switches in an attenuator at the
    rms-to-dc converter's input. Concurrently, it adds a gain stage to
    the circuit's output-buffer amplifier, maintaining a steady output
  2. neon


    Oct 21, 2006
    can you bit $2.99 3 digit meter measure battery under load transistors both types ohms AC/DC ND MAX 10 AMPSall that for $2.99 fit in your palm battery included.
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