https://drive.google.com/drive/folders/11BpBLBlzvXQZEr_oiTbX5Bwy19xwU24E
This publication discusses :
1. Audio, Power Supply, Voltage Inverter, 5V to - 5V made with a few, unregulated MAX1680 IC's with a maximum output resistance of 0.6 Ohms. Discussed is MAX889, which is the similar, but, regulated.
2. + - 3.3V, Audio, Power Supply, Voltage Regulators, made with a voltage reference, amplifiers and TIP31 and TIP32 transistors. Many, other audio, voltage regulators have been discussed.
3. Based on the resources used for these, some ideas have been proposed for a power amplifier, which, is not the main subject of this publication and was introduced in the addendum.
Search the document or scroll down to the sections, named " Schematics " and Pictures.
As usually, mistakes are, always, possible with such a long document.
This publication discusses :
1. Audio, Power Supply, Voltage Inverter, 5V to - 5V made with a few, unregulated MAX1680 IC's with a maximum output resistance of 0.6 Ohms. Discussed is MAX889, which is the similar, but, regulated.
2. + - 3.3V, Audio, Power Supply, Voltage Regulators, made with a voltage reference, amplifiers and TIP31 and TIP32 transistors. Many, other audio, voltage regulators have been discussed.
3. Based on the resources used for these, some ideas have been proposed for a power amplifier, which, is not the main subject of this publication and was introduced in the addendum.
Search the document or scroll down to the sections, named " Schematics " and Pictures.
As usually, mistakes are, always, possible with such a long document.
The document on Google Drive was updated and another chapter, called Errata has been added. The file is called : Audio, Power Supply, Inverter and Voltage Regulators, V1.docx In addition, a new document has been added to the same folder, called Audio, Power Supply, Inverter and Voltage Regulators, V2.docx This is a new device, which, consists of, only, unregulated inverter made of three MAX1680's to provide 375mA at the negative output.
The address of these files and other related files is the same as in the original post : https://drive.google.com/drive/folders/11BpBLBlzvXQZEr_oiTbX5Bwy19xwU24E
I guess, I am addicted to inductorless, capacitive, charge pumps!
The address of these files and other related files is the same as in the original post : https://drive.google.com/drive/folders/11BpBLBlzvXQZEr_oiTbX5Bwy19xwU24E
I guess, I am addicted to inductorless, capacitive, charge pumps!
Thanks for the information, this is helpful.
I've concluded that unless you need exact 5V, 12V, 15V or whatever, it makes more sense just to use LEDs as voltage references. It's simpler and low noise, it saves so much time and energy wasted on meeting a standard that is irrelevant in the application.
I've concluded that unless you need exact 5V, 12V, 15V or whatever, it makes more sense just to use LEDs as voltage references. It's simpler and low noise, it saves so much time and energy wasted on meeting a standard that is irrelevant in the application.
I have, just, written a theoretical, only, document, which discusses inverters with external transistors, proposes a noiseless, voltage regulator IC's, discuses ways to reduce the noise in standard LDO's, etcetera. The document is called " Ideas for External Transistors with Charge Pumps.docx " and is in the same folder :
https://drive.google.com/drive/folders/11BpBLBlzvXQZEr_oiTbX5Bwy19xwU24E
https://drive.google.com/drive/folders/11BpBLBlzvXQZEr_oiTbX5Bwy19xwU24E
Yes, this is OK. Light diodes are, slightly noisy, not much. You can have this : Positive power supply -> resistor -> light diode -> Ground. A capacitor ( s ) should be from the upper pin of the diode to Ground, in parallel to the light diode. Then, you can put a simple diode in series to the output. More capacitors, welcome. Remember to drain some current from the diode. Your voltage will depend on the power supply voltages ( the current through the light diode ). Current source with more capacitors, welcome. Then a heavy, RC filter, then an amplifier or a few. This way, you will reduce the noise, tremendously and the noise will be low, anyway. The output is equal to the voltage of the light diode minus the voltage of the diode. These have similar temperature coefficient and you will have a somewhat, temperature compensated circuit.