Signal processing circuit and signal waveform of video disc player

 Digital circuits generally refer to circuits that process digital signals. It has been widely used in various digital products. Digital signal is a signal that represents digital
encoding content. Digital signal is a binary signal represented by "0" and "1". In circuits, digital signals are mostly represented by the waveform of pulse
signals , so their related circuits are also Related to pulse circuits. At present
, digitization has been realized in products such as digital TVs, digital audio, video machines, and digital peripherals. At the same time, various digital signal processing integrated circuits were also developed . Figure 28-1 shows
the signal processing process of the digital signal circuit of the DVD player. As can be seen from the figure, digital signal processing circuits are also closely related to other signals and are also
related to various circuits.
    It can be seen that in digital products, the signal waveforms processed by digital circuits are also diverse. At present, many digital signal processing circuits
are composed of hundreds of thousands to millions of gate circuits, flip-flops, counters and other unit circuits. In addition, there are many digital signal processing
integrated circuits that integrate microprocessor (CPU) circuits, memory circuits and various interface circuits, forming very large-scale integrated
circuits.