Dual power supplies are required mainly in signal purposes mainly in opamps and in amplifiers.
Amplifiers need high current supply and high voltages for delivering very high watt power to the speaker.
A very simple dual power supply can be make just using capacitor and resistor divider.
Here connecting B+ voltage will give output of +B/2 and - B/2 with respect to PGND on the terminal.
This circuit is used in SINGLE POWER SUPPLY CLASS D AMPLIFER of International Rectifiers' IR4301 and works real good.Here's the link of the IR's amplfier's circuit.
http://www.irf.com/technical-info/refdesigns/iraudamp17.pdf
Besides classical transformer based dual power supply will always works nice and fine.
Amplifiers need high current supply and high voltages for delivering very high watt power to the speaker.
A very simple dual power supply can be make just using capacitor and resistor divider.
Here connecting B+ voltage will give output of +B/2 and - B/2 with respect to PGND on the terminal.
This circuit is used in SINGLE POWER SUPPLY CLASS D AMPLIFER of International Rectifiers' IR4301 and works real good.Here's the link of the IR's amplfier's circuit.
http://www.irf.com/technical-info/refdesigns/iraudamp17.pdf
Besides classical transformer based dual power supply will always works nice and fine.
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