Voltage generator and voltage generating method with wide dynamic range

• Main Author: TU, CHUNG-FAN
• Format: Patent
• Language: Chinese; English
• Published: 01.07.2013
• Subjects: 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

A voltage generator and a voltage generating method with wide dynamic range are provided. The voltage generator includes a transformer, a switching-transistor circuit, a rectification circuit, an adjustable voltage-divider circuit and a feedback circuit. The switching-transistor circuit switches a primary winding voltage of the transformer by using a source voltage according to a modulation signal. Input of the rectification circuit is coupled to a secondary winding of the transformer. Output of the rectification circuit provides a target voltage. Input of the adjustable voltage-divider circuit is coupled to output of the rectification circuit. Output of the adjustable voltage-divider circuit provides a feedback voltage. Dividing ratio of the adjustable voltage-divider circuit is controlled by a control signal. Input of the feedback circuit is coupled to output of the adjustable voltage-divider circuit. The feedback circuit compares the feedback voltage and a reference voltage, and adjusts the modulation sign