This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
[FAQ] How do I design Low Noise & Low Distortion Headphone & Small Signal Audio Amplifiers?
Part Number: LM833
We use LM833 to design the mic pre-amp as 'Single-Supply, Electret Microphone Preamplifier Reference Design' recommended,then the audio input(called device1) transmit to another device(called device2) which is the same design.
We can play normal audio from device2 output,but we also find same small signal from device1 output which can be heard when plugging in headphone.It's a serious problem.
We surmise the signal couple through GND,but don't know how to resolve it.
Do you have some suggestions about audio input & output isolation？
Thanks a lot!
Is this the design? http://www.ti.com/tool/TIPD181
Are two of these circuits in series (output of one connected to the input of the other)?
Is the noise on the headphone just plugged in or is the noise heard somewhere else?
Regards,Ronald MichallickLinear Applications
TI assumes no liability for applications assistance or customer product design. Customer is fully responsible for all design decisions and engineering with regard to its products, including decisions relating to application of TI products. By providing technical information, TI does not intend to offer or provide engineering services or advice concerning Customer's design. If Customer desires engineering services, the Customer should rely on its retained employees and consultants and/or procure engineering services from a licensed professional engineer (LPE).
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.