| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an analog amplifier improved so as to be capable of increasing a DC offset elimination amount as a major purpose. <P>SOLUTION: The analog amplifier includes a feedback variable gain amplifier 102 and a signal variable gain amplifier 104 the relationship between a control current and whose gain is inversely proportional to each other. Employing the feedback variable gain amplifier 102 and the signal variable gain amplifier 104 the relationship between the control current and whose gain is inversely proportional to each other can obtain a large DC offset elimination amount and a constant cut-off frequency, which has been difficult by inverse attenuation characteristics of mere signal variable gain amplifiers. <P>COPYRIGHT: (C)2007,JPO&INPIT |
