Multi-sound-source input DSP adjustable circuit
By using the DSP chip BP1048B2 and integrated digital integrated IC circuit design, the high cost and many components of the input circuit of multiple audio sources of audio equipment are solved, and circuit simplification and reliability are improved.
Patent Information
- Application Number
- CN202422204066.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The various audio source input circuits of existing audio equipment have high design costs, many components and a large PCB occupancy area.
It adopts an integrated digital integrated IC circuit design and uses the DSP chip BP1048B2 to integrate a variety of audio source input functions, including coaxial, optical fiber, HDMI, Bluetooth, USB flash drive, SD card, etc., simplifying the circuit structure and reducing the number of peripheral components.
It realizes simple circuit, low cost, easy wiring and debugging, and improves the reliability of the entire machine.
Smart Images
Figure CN223124998U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of audio, in particular to a DSP adjustable circuit with multiple audio source inputs. Background Art
[0002] At present, many audio devices still adopt traditional circuits such as optical fiber, coaxial, Bluetooth, U disk, DSP, etc. ICs need to be selected according to corresponding functions for design, which not only has high cost, uses many components, but also has a large PCB occupied area. Summary of the Invention
[0003] The technical problem to be solved by the utility model is to provide a DSP adjustable circuit with multiple audio source inputs, which has a simple circuit and low cost.
[0004] To solve the above technical problem, the technical solution of the utility model is: a DSP adjustable circuit with multiple audio source inputs, including a DSP chip, and the model of the DSP chip is BP1048B2; the coaxial signal is input to the pin SPDIF_IN1 of the DSP chip, the optical fiber signal is input to the pin SPDIF_IN2 of the DSP chip, the HDMI signal is input to the pin SPDIF_IN3 of the DSP chip, the LINEIN1 signal is input to the pin LINEIN1 of the DSP chip, the LINEIN2 signal is input to the pin LINEIN2 of the DSP chip, the microphone 1 signal is input to the pin MIC_IN1 of the DSP chip, the microphone 2 signal is input to the pin MIC_IN2 of the DSP chip, the Bluetooth signal is input to the pin BT_IN of the DSP chip, the U disk signal is input to the pin USB of the DSP chip, and the SD card signal is input to the pin SD of the DSP chip; the pins DAC_L / R of the DSP chip realize headphone amplifier output and DAC output, and the pin DAC_X of the DSP chip realizes recording output and USB output; the I2S interface of the DSP chip inputs or outputs I2S signals. The principle of the utility model: adopting an integrated digital integrated IC circuit design, with low cost, few peripherals, simple circuit, easy wiring, easy debugging, few faults, and improving the reliability of the whole machine.
[0005] As an improvement, the DSP chip is respectively connected with a key and an LED display screen.
[0006] The beneficial effect brought by the utility model compared with the prior art is:
[0007] Adopting an integrated digital integrated IC circuit design, with low cost, few peripherals, simple circuit, easy wiring, easy debugging, few faults, and improving the reliability of the whole machine. Description of the Drawings
[0008] Figure 1 It is the wiring schematic diagram of the DSP chip.
[0009] Figure 2 It is the circuit schematic diagram of the DSP chip. Specific implementation mode
[0010] The following further describes the present utility model in conjunction with the accompanying drawings of the specification.
[0011] As Figure 1 、 2 shown, a multi-source input DSP adjustable circuit includes a DSP chip, and the model of the DSP chip is Yuanjing BP1048B2; the coaxial signal is input to the pin SPDIF_IN1 of the DSP chip, the optical fiber signal is input to the pin SPDIF_IN2 of the DSP chip, the HDMI signal is input to the pin SPDIF_IN3 of the DSP chip, the LINEIN1 signal is input to the pin LINEIN1 of the DSP chip, the LINEIN2 signal is input to the pin LINEIN2 of the DSP chip, the microphone 1 signal is input to the pin MIC_IN1 of the DSP chip, the microphone 2 signal is input to the pin MIC_IN2 of the DSP chip, the Bluetooth signal is input to the pin BT_IN of the DSP chip, the U disk signal is input to the pin USB of the DSP chip, and the SD card signal is input to the pin SD of the DSP chip; the pins DAC_L / R of the DSP chip realize headphone amplifier output and DAC output, and the pin DAC_X of the DSP chip realizes recording output and USB output; the I2S interface of the DSP chip inputs or outputs I2S signals; the DSP chip is respectively connected to a key and an LED display screen.
[0012] Use Mountain View BP1048B2 LQFP48 for mode selection, mainly including BT / USB / SD / line / optical fiber / coaxial / HDMI / MIC, etc., to enter the required working mode. After entering the relevant mode, through MCU decoding and communication, digital signals are output, which are then converted by DAC to generate analog audio signals, and the audio signals are amplified through headphones or power amplifiers; digital power amplifiers can also be selected for direct I2S communication. With the supporting Mountain View tuning software, BP1048B2 can realize functions such as frequency division, compression limiting, high pass, low pass, EQ, noise gate, etc. for 2.1 speakers and 1.1 speakers, and support functions such as microphones, reverberation, and anti-whistling. Adopting an integrated digital IC circuit design, it has low cost, few peripherals, simple circuit, easy wiring, easy debugging, few faults, and improves the reliability of the whole machine.
Claims
1. A multi-source input DSP adjustable circuit, characterized in that: It includes a DSP chip, and the model of the DSP chip is BP1048B2; the coaxial signal is input to the pin SPDIF_IN1 of the DSP chip, the optical fiber signal is input to the pin SPDIF_IN2 of the DSP chip, the HDMI signal is input to the pin SPDIF_IN3 of the DSP chip, the LINEIN1 signal is input to the pin LINEIN1 of the DSP chip, the LINEIN2 signal is input to the pin LINEIN2 of the DSP chip, the microphone 1 signal is input to the pin MIC_IN1 of the DSP chip, the microphone 2 signal is input to the pin MIC_IN2 of the DSP chip, the Bluetooth signal is input to the pin BT_IN of the DSP chip, the USB flash drive signal is input to the pin USB of the DSP chip, and the SD card signal is input to the pin SD of the DSP chip; the pins DAC_L / R of the DSP chip realize the headphone amplifier output and the DAC output, and the pin DAC_X of the DSP chip realizes the recording output and the USB output; the I2S interface of the DSP chip inputs or outputs I2S signals.
2. The adjustable circuit of DSP with multiple sound source inputs according to claim 1, wherein: The DSP chip is respectively connected to the keys and the LED display screen.