发明名称 |
COMPARATOR, A/D CONVERTER, PWM SIGNAL GENERATOR, POWER SOURCE DEVICE AND POWER SOURCE CONTROLLER |
摘要 |
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. |
申请公布号 |
JPH08111641(A) |
申请公布日期 |
1996.04.30 |
申请号 |
JP19940245282 |
申请日期 |
1994.10.11 |
申请人 |
CANON INC |
发明人 |
INTO JUNICHI;MORIYA MASAAKI |
分类号 |
G03G21/00;G05F1/00;G06F15/78;H02M7/48;H03K7/08;H03M1/12;H03M1/46;H05B3/00 |
主分类号 |
G03G21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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