Circuits & Schematics: frequency meter - 8

Search for: "frequency meter"
Search results: 783 Output: 71-80   Including: frequency (715); meter (105).
  1. .. or ECL logic levels with this circuit. The time constant formed by C 1 and R 4 must be large enough to pass the lowest frequency signal without distortion. The value of R 4 is not critical, as long as the op amp can drive R 4 ...
    09-05-2023
  1. Circuits Measurement Analog Devices LT1004 LT1011 LT1056 LT1102 LTC201A
    .. cross zero, C2 is switched across C1, resetting it to a small negative voltage and forcing A1 to begin recharging it. The frequency of this oscillatory behavior is directly proportional to the input derived current into A1. During the ...
    24-04-2023
  1. .. still nearly twice the usual 555’s oscillation amplitude of V+/3 = 1.67 V and so still pretty good. Oscillation frequency is inversely proportional to programmed V PP . U2 will typically be an element of a 74HC04 or similar ...
    20-04-2023
  2. .. power. You can often send a signal across the isolation barrier using a small transformer; transformers do not pass low-frequency signals well. The circuit in this Design Idea converts a low-frequency PWM (pulse-width-modulated) ...
    12-04-2023
  3. .. IC 1 . You set the differentiator time constant with R 2 and C 2 . The gain of a differentiator circuit increases with frequency, making these circuits prone to instability. You use R 5 and C 8 to keep the circuit stable. At the low ...
    05-04-2023
  4. .. a three-phase ac system, a power source with three wires delivers ac potentials of equal frequency and amplitudes with respect to a zero-potential wire, each shifted in phase by 120 from one wire to the ...
    03-04-2023
  5. .. forms the input to the corrective anticipator circuit, whose output is the voltage signal, V OUT . In the complex frequency, s, you can write the output of the lowpass filter as a function of its input, V IN , in the form of ...
    29-03-2023
  6. .. and IC 3 ), and an integrator (IC 4 ) accomplish automatic gain control of V IN ’s amplitude variations in the audio-frequency range. Figure 1. Analog multiplier IC 1 combines V IN with a feedback signal V Y to achieve automatic ...
    28-03-2023
  7. .. at all available frequencies. The hold-up time on C9 is about 100 µs with a 1 kHz output, and it varies with frequency. A sample is taken on each cycle of the input voltage (the output of the oscillator), ensuring that the ...
    .. can't null any further. There is some noise apparent, some of which is from the oscillator and some from the distortion meter itself. The sinewave and residual are shown below in Figure 4. Similar results were obtained from my other ...
    24-03-2023
  8. .. than 0.2 µA. This constraint implies that R 4 ’s value is less than 6.12 MΩ. The triangular-waveform frequency is: For this example, the frequency is 25 kHz, the output voltage is 4 V p-p, or 0.5 to 4.5 V for a ...
    17-03-2023

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