2. This type of direct current with a frequency of 100Hz ripple voltage will cause interference from the 100Hz ripple voltage when applied in high-frequency signal circuits such as videos. For example, two rolling black and white horizontal bars may appear in the TV screen;

    3. So there is a switch regulated power supply;

    4. Switching stabilized power supply:

    4.1) There is an inverter link that converts the rectified and filtered output DC power into high-frequency AC power;

    4.2) Rectify and filter high-frequency AC power into DC power, and the ripple voltage frequency of this DC power is twice that of this "high frequency";

    4.3) With high frequency DC ripple voltage, the TV screen will no longer have two rolling black and white stripes, which is a very important indicator for high-frequency signal circuits;

    5. Our general audio circuit is an audio circuit, and the DC power quality of ordinary rectification and filtering outputs is sufficient, without the need for a switching power supply;

    6. A regular DC motor power supply, the quality of rectified output DC power is sufficient;

    7. If the switching power supply is used for ordinary circuits or equipment, it will reduce usage efficiency and increase costs;