Nyquist Theorem

Clever Use of Nyquist: How to Generate High-Frequency Signals Using DAC Characteristics?

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Clever Use of Nyquist: How to Generate High-Frequency Signals Using DAC Characteristics?

In the field of digital signal processing, the Nyquist sampling theorem establishes the fundamental criterion for signal digitization— to accurately reconstruct a continuous signal, the sampling frequency must be at least twice the highest frequency of the signal.However, engineers have observed an interesting phenomenon: in practical applications, we often generate signals exceeding 500MHz using a … Read more

Why Are Oscilloscopes So Expensive?

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Why Are Oscilloscopes So Expensive?

Oscilloscopes Are Simple Yet Complex! But Why Are Oscilloscopes So Expensive? Most cost thousands or tens of thousands, why are they so expensive? Structure of Digital Oscilloscopes The Reason Oscilloscopes Are Considered Simple Is That An Oscilloscope Is A Test Instrument That Can Display The Dynamic Waveform Of Voltage Signals. An Oscilloscope Converts Time-Varying Voltage … Read more

Introduction to DAC Basics – Output Response

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Introduction to DAC Basics - Output Response

First, what is a Digital-to-Analog Converter (DAC)? A DAC is used to convert digital samples in bit form into analog waveforms of current or voltage. In short, a DAC is used to reconstruct an analog signal from a digital signal. The process of reconstructing an analog signal from a digital signal is as follows. First, … Read more