Circuits & Schematics: frequency - 4

31. Frequency Comparator has Status Output
    Susanne Nell
    Circuits Measurement NXP 74HC4046AD
    .. an engine with only one LED as an indicator. The measurement of the number of revolutions usually involves sensors with a frequency output proportional to the number of revolutions. The circuit compares the frequency output of such a ...
    Apr 20, 2021

32. Frequency doubler operates on triangle wave
    Circuits Analogue Design Texas Instruments TLC2272
    Frequency multipliers typically work with square waves. However, the circuit in Figure 1 performs frequency ...
    May 18, 2021

33. Triangle Waves Drive Simple Frequency Doubler
    Jim McLucas
    Circuits Oscillators Vishay 1N914 SD101
    .. you use a function generator, you may occasionally require a sine-wave output at a higher frequency than the generator can provide. If your function generator also produces a triangle-wave output, you ...
    May 26, 2021
34. Build A High-Frequency Portable Spectrum Analyzer Using Two Filter ICs
    Circuits Measurement MSI MSLSA MSMXVHF
    .. This can be achieved, for example, by using an IC such as Mixed Signal Integration’s Mixed Signal MiXer and Very High frequency Filter ( MSMXVHF ) to baseband, while the Mixed Signal Low powered Spectrum Analyzer (MSLSA) provides ...
    Jun 29, 2021
35. Input buffer and attenuator for sound card oscilloscopes extends low-end frequency response
    Stephen Woodward
    Circuits Measurement Texas Instruments TLV9051
    .. Many of these “Sound Card Scopes” are quite capable, providing input scaling, triggering and timebase options, frequency analysis, data file storage, and built-in signal generators. But even the best software app can go only ...
    Feb 15, 2022
36. Wideband peak detector operates over wide input-frequency range
    Jim McLucas
    Circuits Analogue Design Measurement Texas Instruments LM6171 TL084
    .. IC 1 ’s input-offset voltage and input-bias currents. R 1 , R 4 , and C 1 provide a small amount of gain boost as the frequency increases to 25 MHz, and C 5 then begins to roll off the gain. Figure 1. This precision peak detector ...
    Sep 14, 2022
37. Frequency Doubler with 50 Percent Duty Cycle
    Jim McLucas
    Circuits Analogue Design Oscillators Texas Instruments CD74HC00 CD74HC4538 CD74HC86 TLV9052
    .. is a simple frequency doubler circuit that produces a square wave output with a precise 50 percent duty cycle. There are ...
    Sep 7, 2022
38. Piezoelectric Driver Finds Buzzer's Resonant Frequency
    Mehmet Efe Ozbek
    Circuits Measurement Microcontrollers Usage Microchip PIC18F452
    .. power consumption and clear, penetrating sound. An external driver or a self-driven circuit that oscillates at the resonant frequency of the piezoelectric element can drive these buzzers. A piezoelectric element produces the maximum ...
    Nov 17, 2022
39. High-Voltage, High-Frequency Amplifier Drives Piezoelectric PVDF Transducer
    Enrique Vargas Raúl Gregor Sergio Toral Vicente González
    Circuits Measurement Amplifiers Texas Instruments LM7171
    .. basically the same, but this one can drive a 2.3-nF capacitive load at frequencies as high as 500 kHz. Figure 1. This high-frequency, high-voltage amplifier can drive the capacitive load from a PVDF (polyvinylidene-fluoride) ...
    Dec 2, 2022
40. 555 triangle generator with adjustable frequency, waveshape, and amplitude; and more!
    Stephen Woodward
    Circuits Oscillators Texas Instruments LMC555 TLV2372
    .. design idea with a 555 analog timer that can generate an arbitrary triangle/sawtooth with its waveshape and frequency controlled by pots. If you could assemble the list of all the oscillators that have been designed ...
    Feb 9, 2023

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