Circuits & Schematics: frequency - 10

91. PWM controller drives LEDs from high-voltage lines
    Christophe Basso
    Circuits Supply ON Semiconductor NCP1200
    .. mode, the sum of on-time and off-time gives the switching period of the 1200AP60: where f S is the switching frequency. Extracting L 1 yields If you select a ripple current of 20 mA peak-to-peak at 380 V dc, then From this ...
    Nov 7, 2023

92. Low-cost digital DAC provides digital three-phase-waveform synthesis
    S Gonzalez
    Circuits Oscillators NXP UDA1330ATS
    .. Reference 1 ) or DDS (direct digital synthesis). Digital techniques provide higher stability and the ability to incorporate frequency, phase, and amplitude adjustments. For applications requiring 16-bit or higher-resolution, ...
    Oct 27, 2023

93. DC-voltage doubler reaches 96% power efficiency
    Marián Štofka
    Circuits Supply Analog Devices AD8617 ADG888
    .. converter in applications in which power efficiency is a critical issue. The two phases of operation repeat periodically at frequency f, which clock generator IC 2 determines. The duty cycle is about 50%, but the value isn’t all ...
    Oct 19, 2023
94. A 50 MHz 50:50-square wave output frequency doubler/quadrupler
    Stephen Woodward
    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 ...
    Oct 10, 2023
95. Circuit's RMS output is linearly proportional to temperature over wide range
    R O Ocaya
    Circuits Measurement Analog Devices LT1001
    .. between V 1 and V 2 and therefore has an inherent dc level that can filtered using a simple RC-network with a low cut-off frequency, e.g., 2 Hz if needed. Filtering guarantees square-wave output with negligible peak level attenuation ...
    Oct 3, 2023
96. Handheld electric PCB drill speed controller
    T.K. Hareendran
    Circuits Tools and Technologies Microcontrollers Usage Infineon IRL520N
    .. and only uses a few components. Basically, it is an Arduino Uno based PWM controller that operates at a relatively high frequency (Figure 1). It features almost 0-100% DC motor speed regulation while retaining the pulse width ...
    Sep 28, 2023
97. AC-coupling instrumentation amplifier improves rejection range of differential dc input voltage
    Francis Rodes
    Circuits Analogue Design Amplifiers Analog Devices LT1464
    .. comprising IC 4 , R FB , and C FB , in a classic three-op-amp instrumentation amplifier. This feedback loop produces a frequency-dependent transfer function: Consequently, the ac-coupled instrumentation amplifier behaves as a ...
    Sep 27, 2023
98. Single cell flashes white LED
    Anthony Smith
    Circuits Supply Light
    .. forward-current gain of Q 5 ; and the forward voltage of LED 1 . With the component values in the figure, the oscillation frequency is typically 50 to 200 kHz. On each cycle, a pulse of current with a peak value equal to I LPEAK flows ...
    Sep 26, 2023
99. Single switch controls digital potentiometer
    Chuck Wojslaw Gary M Craig
    Circuits Analogue Design Interfaces Digital Texas Instruments SN74HC132
    .. the rocker switch, the clock generates one pulse. If you continuously depress the rocker switch, the clock free-runs at a frequency of approximately 1/R 1 C 1 . Materials on the topic Datasheet ON Semiconductor CAT5114 Datasheet Texas ...
    Sep 21, 2023
100. 1 kHz per degree Kelvin temperature sensor
     Stephen Woodward
     Circuits Analogue Design Measurement Fairchild 2N3904
     .. C1 could be increased seemingly without limit, without decreasing oscillation amplitude one iota. Oscillation frequency decreased (inversely proportional to C1), but oscillation amplitude remained stubbornly unattenuated. ...
     Sep 8, 2023

Sort by: relevance / date