The primary functions of signalbehandlingskretsen include amplification, filtering, modulation, demodulation, and conversion between different signal forms. Amplification involves increasing the amplitude of a signal to make it usable or to compensate for signal loss. Filtering is the process of removing unwanted components from a signal, such as noise or specific frequency ranges. Modulation and demodulation are techniques used to encode and decode information onto a carrier signal, respectively. Signal conversion involves changing the form of a signal, such as converting an analog signal to a digital signal or vice versa.
Signalbehandlingskretsen can be implemented using various technologies, including analog circuits, digital circuits, and mixed-signal circuits. Analog circuits use continuous signals and are often used for tasks like amplification and filtering. Digital circuits use discrete signals and are well-suited for tasks like signal processing, data conversion, and control. Mixed-signal circuits combine both analog and digital components to leverage the strengths of each technology.
The design of signalbehandlingskretsen involves considerations such as signal integrity, noise reduction, power consumption, and cost. Signal integrity ensures that the processed signal remains accurate and free from distortion. Noise reduction techniques are employed to minimize the impact of unwanted signals. Power consumption is a critical factor, especially in portable and battery-powered devices. Cost considerations include the selection of components and manufacturing processes to achieve a balance between performance and affordability.