发明授权
- 专利标题: Variable gain amplifier apparatus
- 专利标题(中): 可变增益放大器装置
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申请号: US547120申请日: 1995-10-23
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公开(公告)号: US5625321A公开(公告)日: 1997-04-29
- 发明人: Kazuji Sasaki , Masayuki Katakura , Kazuyuki Saijo
- 申请人: Kazuji Sasaki , Masayuki Katakura , Kazuyuki Saijo
- 申请人地址: JPX Tokyo
- 专利权人: Sony Corporation
- 当前专利权人: Sony Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX6-289140 19941028
- 主分类号: H03G3/20
- IPC分类号: H03G3/20 ; H03F3/62 ; H03G3/30 ; H04B1/16 ; H03F3/68
摘要:
In a variable gain amplifier apparatus, wide input dynamic range can be secured and low noise characteristic can be obtained by employing first and second variable gain amplifiers have different noise characteristics and different saturation input levels and receive a same input signal. Output signals of the first and second variable gain amplifiers are added to each other to provide an output signal of the variable gain amplifier apparatus. Desired noise characteristic and saturation input level characteristic of the variable gain amplifier apparatus can be obtained by selecting the noise characteristics and the saturation input levels of the first and second variable gain amplifiers appropriately. This allows the variable gain amplifier apparatus to have a wide input dynamic range and low noise characteristic.
公开/授权文献
- US4547339A Method of sterilizing a filling machine apparatus 公开/授权日:1985-10-15