urslen
Member level 2
Hi,
I have a GSM module ( Multitech Systems ) and a Bluetooth module ( APM ). The modules, as Individual system, functions perfectly. But when I interface the audio link of the GSM module with that of Bluetooth module, the system does not function well. I have the full design details of blue tooth module, but I dont have any documents for GSM module.
I understand that the impedance mismatch between the audio link of both the modules creats the problem. The audio link ( Mic and Speaker ) of both modules are differintial in nature.
Please suggest me a solution.
I have a GSM module ( Multitech Systems ) and a Bluetooth module ( APM ). The modules, as Individual system, functions perfectly. But when I interface the audio link of the GSM module with that of Bluetooth module, the system does not function well. I have the full design details of blue tooth module, but I dont have any documents for GSM module.
I understand that the impedance mismatch between the audio link of both the modules creats the problem. The audio link ( Mic and Speaker ) of both modules are differintial in nature.
Please suggest me a solution.