Hi again,
Now I ´m trying to obtain the most linear signal that is possible from a baterry of 4.5 volts to 1.5 volts (with low current less than 100 mA).
I will use this 1,5 volts for powerin an electret measurement microphone. The noise of the power will be in the output signal of the microphone and after to be amplified (40 dB) it generate me a big error in mi peak to peak max values detector.
I start using an low voltage regultor from microchip (studing a lot of data sheets I thougt it could ve a good option).
http://www.microchip.com/wwwproducts/Devices.aspx?product=MCP1700
I´m using the recomendated schematics from microchip (option 1) and after that a low pas filter aded by me (option 2), ussing electrolitic capacitors and tantalum capacitors, with no diferences.
But the results are not what I hope, you can see a small noise signal od 10 t0 12 mV.
I need to reduce this noise making the signal more stable and make mi measurement microphone more stable.
Any ideas?? many thanks
Now I ´m trying to obtain the most linear signal that is possible from a baterry of 4.5 volts to 1.5 volts (with low current less than 100 mA).
I will use this 1,5 volts for powerin an electret measurement microphone. The noise of the power will be in the output signal of the microphone and after to be amplified (40 dB) it generate me a big error in mi peak to peak max values detector.
I start using an low voltage regultor from microchip (studing a lot of data sheets I thougt it could ve a good option).
http://www.microchip.com/wwwproducts/Devices.aspx?product=MCP1700
I´m using the recomendated schematics from microchip (option 1) and after that a low pas filter aded by me (option 2), ussing electrolitic capacitors and tantalum capacitors, with no diferences.
But the results are not what I hope, you can see a small noise signal od 10 t0 12 mV.
I need to reduce this noise making the signal more stable and make mi measurement microphone more stable.
Any ideas?? many thanks
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