Stereo receiver concept

This article proposes the idea of a hardware complex that is responsible for processing signals. The concept was created on the basis of product analysis in the market and the basic needs of the user. Using FPGA (Field-Programmable Gate Array) allows you to achieve greater functionality with reduced use of hardware resources.

This device is an amplifier with digital-to-analogue converters (hereinafter - DACs) centered on the processor responsible for processing the signal. There is also a large number of different signal inputs and outputs, depending on the configuration and user needs. There is a need to create a device targeting the basic methods of reception of audio signals, with the ability to connect other external sources. The programmable matrix has implemented eleven band equalizer for manual adjustment of the vast range of input signal spectrum. The basis of each band is the implementation of a bandpass filter for each predetermined frequency. It is especially important to have more frequencies adjustable from 60 Hz to 2000 Hz, since most musical instruments run off frequencies from this range. In this way, with a lot of adjusting peculiarities, you can achieve better sounding on different speakers.

In most cases, the user will use standard quality signals that provide popular stream audio services, and in turn, they do not support lossless audio stream.

The use of FPGA in audio equipment systems is beneficial in terms of hardware and software resources. The main advantage is the ability to configure a certain number of signal circles on one FPGA to achieve higher compute densities. From the point of view of signal processing, this approach reduces the delay of the signal from the input to the output of the system.

Using FPGA with its technical capabilities improves this situation, since the whole computing block will be built on a single programmable matrix. Today there is a large number of chips of different power; this allows you to choose the most optimal solution for building a signal processing system.