Circuits & Schematics: frequency meter - 10

91. Input buffer and attenuator for sound card oscilloscopes extends low-end frequency response
    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 ...
    15-02-2022

92. Wideband peak detector operates over wide input-frequency range
    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 ...
    14-09-2022

93. Frequency Doubler with 50 Percent Duty Cycle
    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 ...
    07-09-2022
94. Piezoelectric Driver Finds Buzzer's Resonant Frequency
    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 ...
    17-11-2022
95. High-Voltage, High-Frequency Amplifier Drives Piezoelectric PVDF Transducer
    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) ...
    02-12-2022
96. 555 triangle generator with adjustable frequency, waveshape, and amplitude; and more!
    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 ...
    09-02-2023
97. 90 µA Precision Voltage-to-Frequency Converter
    Circuits Analogue Design Measurement Texas Instruments LM334
    .. 1 is a micropower voltage-to-frequency converter. A 0 V to 5 V input produces a 0 kHz to 10 kHz output with a linearity of 0.05%. Gain drift ...
    02-03-2023
98. Low power voltage-to-frequency converter makes a wireless probe for testing an inductive power supply
    Circuits Wireless Measurement Supply Texas Instruments LMC7211
    .. that prevent entry of a cable or a probe. The circuit in Figure 1 reduces noise effects because its VFC (voltage-to-frequency converter) produces a PPM (pulse-position-modulated) output signal, V OUT , that integrates, or ...
    03-08-2023
99. Fast(er) frequency doubler with square wave output
    Circuits Signal Processing, Filters Texas Instruments SN74LVC1G74 SN74LVC1G86 TLV3501 TLV9052
    .. will operate, if this is an appropriate spec for the circuit. Mentally, I give the circuit a low score if the operating frequency range is, in my opinion, limited. My nagging thought was “can the operating frequency range for ...
    24-08-2023
100. A 50 MHz 50:50-square wave output frequency doubler/quadrupler
     Circuits Signal Processing, Filters Texas Instruments SN74AC86 SN74AC74 TLV2374
     .. 50:50 square waves, thus slicing and dicing the time axis into equal segments. He’s also often included a wide-range frequency doubler functions: Convert any signal to exactly 50% duty cycle ( Ref. 1 ) Frequency doubler with 50 ...
     10-10-2023

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