Low-noise symmetrical audio power supply
Low-noise symmetrical audio power supply.
The power supply consists of two circuits enabling symmetrical voltage depending on the selection of several resistors with a value from i3 V to i24 V.
The system is powered with alternating voltage from a network transformer with a divided winding, connected to the AC connector. This voltage is rectified in a bridge composed of high-speed RSID diodes and filtered through CE1, CE4. This voltage is pre-stabilized in the classic LM317 regulated stabilizer for positive voltage and LM337 for negative voltage, and thus it is applied to the low-noise U2 stabilizers of the TPS7A4701 type for the positive voltage and TPS7A3301 for the negative voltage.
Low-noise symmetrical audio power supply
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