| 摘要 |
PURPOSE: A ripple removal switching mode power supply is provided to be capable of providing a stable DC voltage by removing a ripple component generated at a front part of a transmission pulse. CONSTITUTION: The first rectifier part(401) converts an AC voltage into a DC voltage. A transformer(402) transforms the DC voltage of the first rectifier part. A FET switch(403) switches the DC voltage from the transformer. The second rectifier part(404) converts into a DC component a high-frequency AC component generated by a high-frequency switch operation of the FET switch. A pulse control part(405) adjusts a voltage DC converted by the second rectifier part to apply a pulse to the FET switch. A switching control part(406) makes a switch operation of the FET switch stopped before a transmission pulse is not generated from the pulse control part. A post regulator(407) operates at the same time when the transmission pulse is generated and outputs a DC voltage.
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