Switched power supply - generates negative pulses that are rectified to produce negative constant voltage

A switched power supply circuit is used to generate a negative bias voltage (-U) for use in a TV or video recorder. The positive input voltage (+Vcc) to a transistor (Ts) and coil (L) via a filter that is in the form of resistance (1) and capacitor (2). The transistor (Ts) is operated at 30 kHz by a...

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Bibliographische Detailangaben
Hauptverfasser:	RILLY, GERARD., 7731 UNTERKIRNACH, DE, RODRIGUEZ-DURAN, JOSE, 7730 VILLINGEN-SCHWENNINGEN, DE
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	A switched power supply circuit is used to generate a negative bias voltage (-U) for use in a TV or video recorder. The positive input voltage (+Vcc) to a transistor (Ts) and coil (L) via a filter that is in the form of resistance (1) and capacitor (2). The transistor (Ts) is operated at 30 kHz by an applied input (Us). By switching off the transistor, a pulse (3) is generated which is rectified by a diode (D) and a capacitor (4) to produce the constant negative voltage (-Uv). ADVANTAGE - Simple circuit to generate negative voltage.