Recommend me an amplifier?

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• Satellite A215-S7444 - name of the low frequency amplifier

  I need to know the name of aplifier of low frequency in a Toshiba Satellite A215-S7444 main laptop Board. I have problem with my speakers because they beep. And the problem is with amplifier speakers.

  Please tell me the name of this integrated circuit.

  Hello

  I think that no one here can answer this question because it s only a user to user forum and I have never seen anyone from Toshiba here. I think that this question can be answered only authorized individuals.

  I recommend you contact an authorized service provider. Technicians could answer this question and help you get a new spare part.

  Good luck!

• Power amplifier

  
  

  1. This is a power amplifier, using the usual configuration of a non inverter op-amp amplifier. The gain is set by the relationship between the resistance of 1 k and 20 k resistance. We'll call the resistance of 1 k R1 and R2 20 k resistance, then the gain G = (R1 + R2) / R1. You should keep R1 to the recommended value (1 k), it increases may affect the offset voltage, i.e. the voltage present at the output when the input is 0V.

  2 see above.

  3. this a circuit protection only against short circuits and can provide up to 3amps. But he runs with a wide range of supply voltages. The maximum output voltage will be close to the supply voltage. Only method to limit power output, I can see is to limit the supply voltage as the maximum output current does not damage your engine.

  4. I am not very familiar with servo-motors, but I think that spin in contrast to reverse the supply voltage of the motor. For negative output of the circuit (in regards to the GND, given that the load output is referenced to GROUND), you must feed a negative tension. With an input voltage go positive only (compared to the MASS), the engine always receives a positive voltage. (Page 8 works somewhat different, it uses the difference between the tensions of entry of the two circuits as input signal).

  To move a "unipolar" (i.e. goes positive only) mains voltage one that goes from a negative value to a positive value, you probably need some level shift circuits. Usually, this is done with an analog Adder, addition of a reference to the input voltage voltage. Because basically, the LM675 is an op-amp with a very high output current, it is probably possible to add this track to the basic circuit, using a reference voltage source.

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  My router did change? Should Qwest reconfigure it?

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  Hello EmeraldIbex,

  Thanks for your question.  I think that music is one of the coolest things you can do on a Mac!  I'll include some products from our Web site to help you get started.  Products such as The Apogee One will give the microphone and line input jacks you need to record instruments.   Microphones such as the Shure SM58 will provide you with exceptional quality for your voice.  A visit to your store studio or recording local music will help you decide which is the best techniques of micro and placement for your big baby recording.   Here are a few sections of the GarageBand User Guide that explain how to record vocals, instruments, and several tracks on your Mac.

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