An audio calibration circuit and audio equipment
A technology for calibrating circuits and audio circuits, applied in the direction of frequency response correction, etc., can solve the problems of doping mismatch voltage, reducing user experience, affecting circuit reliability, etc., to eliminate mismatch voltage, improve user experience, and eliminate mismatch. Effect
Active Publication Date: 2022-03-15
SHENZHEN BLUETRUM TECH CO LTD
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The audio circuit of the audio device responds to the input of audio data, and outputs audio through the speaker. When the electronic components used in the audio circuit are mismatched, the signal received by the speaker is doped with a mismatch voltage, which will cause the electronic device to be powered on and off. Undesirable "POP" noise occurs, affecting circuit reliability and degrading user experience
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0060] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0061] It should be noted that, if there is no conflict, various features in the embodiments of the present invention may be combined with each other, and all of them are within the protection scope of the present invention. In addition, although the functional modules are divided in the schematic diagram of the device, and the logical order is shown in the flowchart, in some cases, the division ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention relates to an audio calibration circuit and audio equipment. The audio circuit includes a current input module electrically connected in series, a DAC circuit and an amplifier circuit. The audio calibration circuit includes a controller. The controller controls the DAC circuit to be turned on and the amplifier circuit to be turned off. According to The output of the DAC circuit adjusts the differential input current, and obtains the first calibration value, then controls the DAC circuit and the amplifier circuit to turn on, controls the DAC circuit to establish a connection with the amplifier circuit, and controls the output terminal of the amplifier circuit to be grounded, and adjusts according to the output of the DAC circuit Differential input current, and obtain the second calibration value, when the audio circuit is actually working, get the third calibration value according to the first calibration value, the second calibration value and the proportional coefficient, and finally adjust the differential input current according to the third calibration value, to Eliminate the mismatch between the DAC circuit and the amplifier circuit, so when the audio equipment is powered on and off, there will be no noise signal caused by the mismatch, which improves the user experience.
Description
technical field [0001] The invention relates to the field of audio calibration, in particular to an audio calibration circuit and audio equipment. Background technique [0002] In the manufacturing process of electronic components, due to the deviation of the manufacturing process or other reasons, the actual parameters of the components may not match the design parameters, which is called component mismatch. [0003] The audio circuit of the audio device responds to the input of audio data, and outputs audio through the speaker. When the electronic components used in the audio circuit are mismatched, the signal received by the speaker is doped with a mismatch voltage, which will cause the electronic device to be powered on and off. Undesirable "POP" noise occurs, affecting circuit reliability and degrading user experience. Contents of the invention [0004] The embodiment of the present invention solves one of the above-mentioned technical problems at least to a certain ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/04
CPCH04R3/04
Inventor 陈文韬芦文李健勋
Owner SHENZHEN BLUETRUM TECH CO LTD