Application:
I am working on wireless voice communication using MC52i Cinterion module, using analog interface-2(i.e micp2, micn2, epp2, epn2) for microphone and speaker. Microphone is working fine, but speaker need audio amplifier,and the amplifier is producing noise, hiss and hum along with the amplified output. I tried a lot to get the clear output but still problem exist.
Without amplifier voice is clear but the volume is very low.
Specifications for amplifier circuit
IC: LM4890
Vs:- 5 Volt
I also tried with other amplifier Ic but the result is same.
I attached schematic diagram of MC52i and circuit diagram of audio amplifier using LM4890, which i used.
so plz help me regarding this.
I am working on wireless voice communication using MC52i Cinterion module, using analog interface-2(i.e micp2, micn2, epp2, epn2) for microphone and speaker. Microphone is working fine, but speaker need audio amplifier,and the amplifier is producing noise, hiss and hum along with the amplified output. I tried a lot to get the clear output but still problem exist.
Without amplifier voice is clear but the volume is very low.
Specifications for amplifier circuit
IC: LM4890
Vs:- 5 Volt
I also tried with other amplifier Ic but the result is same.
I attached schematic diagram of MC52i and circuit diagram of audio amplifier using LM4890, which i used.
so plz help me regarding this.
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