Plosive eliminating circuit of audio system and mobile communication terminal
An audio system and circuit elimination technology, which is applied in telephone communications, transducer circuits, electrical components, etc., can solve the problem that the output delay hardware solution is not suitable for complex audio systems, and achieves increased hardware cost, simple design structure, achieve easy effects
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0038] Embodiment one, see Figure 4 As shown, the audio system of this embodiment is composed of audio processing circuits, DC blocking capacitors C6023 / C6026, and electroacoustic devices. Wherein, the audio signal output by the audio processing circuit may be a single-ended monophonic signal or a single-ended stereo signal. In this embodiment, the single-ended stereo signals MIX_L and MIX_R are taken as an example for illustration. A voltage clamping circuit is set on the audio transmission channel that transmits the single-ended stereo signal MIX_L, MIX_R, such as Figure 4 As shown, the voltage clamping circuit composed of voltage dividing resistors R6003, R6005 and DC power supply VMSMP is connected to the transmission channel for transmitting the left channel single-ended audio signal MIX_L, that is, after the voltage dividing resistors R6003 and R6005 are connected in series, one end is connected to the DC power supply VMSMP, the other end is grounded, and its voltage...
Embodiment 2
[0046] Embodiment two, see Figure 5 As shown, the audio system of this embodiment is composed of main parts such as audio processing circuit, audio amplifier U2 / U3 and electro-acoustic devices. Wherein, the audio signal output by the audio processing circuit may be a single-ended audio signal, such as a single-ended stereo signal MIX_L, MIX_R; or a differential audio signal, such as AUXOP, AUXON. Since the more common audio amplifiers in the industry are in the form of differential input, such as Figure 5 As shown in the audio amplifiers U2 and U3, if the DC bias voltages of the two signals at the differential input terminals are inconsistent, the audio amplifiers U2 and U3 will generate POP sounds at the moment of switching. If the audio amplifiers U2 and U3 directly receive the conventional differential audio signals AUXOP and AUXON, since the DC bias voltages in the differential audio signals AUXOP and AUXON are equal, no POP sound will be generated when the audio amplif...
Embodiment 3
[0051] Embodiment three, see Figure 6 As shown, with the increasingly powerful functions of mobile phones, many current high-end mobile phones have complex audio systems, such as supporting MP3, MP4, FM audio broadcasting and other playback functions, so it is necessary to fully consider the output forms of various audio signals.
[0052] like Figure 6As shown, the voice signal and key tone during the mobile phone call are output in the form of differential mono signal AUXOP, AUXON and single-ended mono signal EAR20 through the audio codec CODEC1 integrated in the main chip; in MP3 and MP4 files The audio signal can be processed by the audio codec CODEC2 and output in the form of single-ended stereo signals HPOUTR and HPOUTL; while for FM broadcasting, it can be processed by the audio codec CODEC3 and output in the form of single-ended stereo signals FM_OUTR and FM_OUTL output. Among them, the single-ended mono signal EAR20 output through CODEC1 and the single-ended stereo...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com