发明名称 |
AMPLIFICATION CIRCUIT, AMPLIFICATION CIRCUIT NOISE REDUCING METHOD AND PROGRAM THEREOF |
摘要 |
[Problems] to provide a CMOS low-noise amplification circuit which can reduce a chip area and design time, and which is easy to be digital-controlled from outside. [Means For Solving the Problems] The amplification circuit includes; an amplification stage (12) which amplifies an input signal up to an intended value; a sample and hold circuit (13) which samples the output signal from the amplification stage (12) by sampling the output signal with a sampling frequency which is at least twice the frequency band of the output signal to convert the output signal to a discrete time signal; a moving average calculation unit (15) which selects and outputs a particular frequency from the discrete time signal outputted from the sample and hold circuit (13) by a moving average operation; and a smoothing filter (17) which smoothes the output signal from the moving average calculation unit (15) and feed it back to the input of the amplification stage (12).
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申请公布号 |
US2010045372(A1) |
申请公布日期 |
2010.02.25 |
申请号 |
US20070439971 |
申请日期 |
2007.09.13 |
申请人 |
ISHIZAKI HARUYA;MIZUNO MASAYUKI |
发明人 |
ISHIZAKI HARUYA;MIZUNO MASAYUKI |
分类号 |
H03F1/34;H03F1/26;H03F3/16 |
主分类号 |
H03F1/34 |
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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