COMPARATOR, A/D CONVERTER, PWM SIGNAL GENERATOR, POWER SOURCE DEVICE AND POWER SOURCE CONTROLLER

• Main Authors: INTO JUNICHI, MORIYA MASAAKI
• Format: Patent
• Language: English
• Published: 30.04.1996
• Edition: 6
• 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; BASIC ELECTRONIC CIRCUITRY; CALCULATING; CINEMATOGRAPHY; CODE CONVERSION IN GENERAL; CODING; COMPUTING; CONTROL OR REGULATION THEREOF; CONTROLLING; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; COUNTING; DECODING; ELECTRIC DIGITAL DATA PROCESSING; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; GENERATION; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS; PULSE TECHNIQUE; REGULATING; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

PURPOSE: To obtain a comparator, an A/D converter, a PWM signal generator, a power source device and a power source controller which have high speed and high performance and are capable of miniaturizing chips when they are incorporated into IC chips. CONSTITUTION: A D/A converter 21a is operated by a time division and required comparison reference voltage is supplied to chopper type comparators 5-1 and 5-2. The timing of the operation is mutually shifted by each chopper type comparator, in such a manner that comparison reference voltage is charged in an input capacitor 23a by the chopper type comparator 5-2 when a comparsion operation is performed in the chopper type comparator 5-1. Thus, a comparison can be performed at a high speed without lowering accuracy.