| ??? 04/19/08 22:10 Read: times |
#153724 - 8051 LM386 |
Hello EVERYBODY,
Please refer to the Notes of National'a LM386.pdf Page 6.My application is here.http://www.8052.com/users/AsokRudra/DacSong.gif Please let me know if it is unclear. My question is although I very much appreciate Note 4,which we have to follow in analog power amplifiers,is it still valid in mixed signal application like mine? I welcome expert opinions on my idea which is borrowed from a popular website but modified to suit layout and star ground plan concept.No,I did not encounter any problem so far untill I tried to increase the watt output and tried to use separate power supply for power amplifier.I feel I have to use same power supply for both analog and digital part,except the digital will be stabilised @5v.Am I correct? I am concerned about the R-2R resistance values since most people use 10K-20K combination with 0.1µF coupling capacitor. I use 1.5" 8 Ohm speakers with LM386;1.25" 16 Ohms are worse. Any idea for betterment? With best regards A.S.Rudra |
| Topic | Author | Date |
| 8051 LM386 | 01/01/70 00:00 | |
| You can use a different power supply | 01/01/70 00:00 | |
| What you have here ... | 01/01/70 00:00 | |
| What do you want to do at all? | 01/01/70 00:00 | |
| Music Machine | 01/01/70 00:00 | |
Ok, then 4 bit is enough | 01/01/70 00:00 | |
| Thanks Kai | 01/01/70 00:00 | |
| Link | 01/01/70 00:00 |