Hello. I am a beginner in studying class D amp. I want to make a basic class D amp with less power consumption (no dc offset voltage at speaker). Finally, I used HIP4082 .
However, there is always a dc offset voltage (about 5v) at the input of low pass filter. Then, I had tried to change some connections in order to reduce the offset voltage. It was not be successful.
Could anyone have suggestions --- how to change the connections to minimize dc offset voltage .
Thank you very much.
HIP4082 Datasheet
However, there is always a dc offset voltage (about 5v) at the input of low pass filter. Then, I had tried to change some connections in order to reduce the offset voltage. It was not be successful.
Could anyone have suggestions --- how to change the connections to minimize dc offset voltage .
Thank you very much.
HIP4082 Datasheet
Thank you your reply.
But the schematic had not been drawn. Sorry.
The circuit is simple. I use LM361 and HIP4082 together. The output 1 and output 2 of LM361 are out of phase. Both are connected to the pin3 and pin4 of HIP4082 respectively.
I connect two NMOS to pin14 and pin16 of HIP4082, according to the figure in the datasheet of HIP4082.
The output voltage of a LPF had about 6V dc offset voltage.
datasheet of LM361
But the schematic had not been drawn. Sorry.
The circuit is simple. I use LM361 and HIP4082 together. The output 1 and output 2 of LM361 are out of phase. Both are connected to the pin3 and pin4 of HIP4082 respectively.
I connect two NMOS to pin14 and pin16 of HIP4082, according to the figure in the datasheet of HIP4082.
The output voltage of a LPF had about 6V dc offset voltage.
datasheet of LM361
Connect two more mosfets and use it full bridge and dc offset should cancel.
Add an error amp and apply feedback.
Add an error amp and apply feedback.
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