Principle and implementation of Gaussian filter

Gaussian filter is a linear filter, which can effectively suppress noise and smooth image. Its working principle is similar to the mean filter, which takes the mean value of pixels in the filter window as the output. The coefficients of the window template are different from those of the mean filter, and the template coefficients […]

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Performance characteristics and application analysis of multichannel 24 bit industrial analog-to-digital converter

1 Overview Ads1274 / ADS1278 is a multi-channel 24 bit industrial analog-to-digital converter (ADC) launched by Texas Instruments (TI). It integrates multiple independent high-order chopper stable modulators and FIR digital filters. It can realize 4 / 8-channel synchronous sampling and support four working modes of high speed, high precision, low power consumption and low speed; […]

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Δ-Σ How is the signal-to-noise ratio of the converter calculated

Δ-Σ The performance of the converter is much better than that of a simple analog-to-digital converter. It has oversampling structure, regulator and digital filter. The oversampling structure extends the noise power in a wide frequency range. The regulator generates low-frequency noise or pushes it to a higher frequency. The digital filter can smooth the noise […]

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How should the reliability of LED power supply be tested

What is led power reliability? How should it be detected? 1. Several index forms describing the influence of input voltage on output voltage (1) Voltage stabilizing coefficient ① Absolute voltage stabilizing coefficient K Represents the ratio of the output DC voltage change △ uo of the regulated power supply to the input grid voltage change […]

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Provide a complete active power factor correction solution in a single package

Author: Edward ong, senior product marketing manager, power integration Power designers now face two main problems: eliminating harmful input harmonic currents and ensuring that the power factor is as close to 1 as possible. Harmful harmonic current will lead to overheating of transmission equipment and bring interference problems that must be solved later; Both can […]

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ADI technical article: how to select appropriate circuit protection

Author: diarm ú ID Carey, application engineer, ADI company Question: What active circuit protection scheme can replace TVs diodes and fuses? answer: Try a surge suppressor. abstract Manufacturers in all industries are constantly promoting high-end performance and trying to strike a balance between such innovation and mature and reliable solutions. Designers face the difficult task […]

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design case of how to realize audio signal detection

Sound can be represented by analog or digital audio signals. Analog audio signals use voltage levels. Different types of transducers convert sound into electrical signals and electrical signals into sound. The audio signal frequency range is approximately 20 Hz to 20000 Hz. Sources such as microphones and speakers will generate or receive audio signals, but […]

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