发明公开
- 专利标题: Frequency response compensation circuit
- 专利标题(中): 频率响应补偿电路
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申请号: EP87114909.2申请日: 1987-10-13
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公开(公告)号: EP0265763A3公开(公告)日: 1989-01-25
- 发明人: Jove, Stephen Alan , Klaassen, Klaas Berend , VanPeppen, Jacobus Cornelis Leonardus , Vo, Chon Ngoc
- 申请人: International Business Machines Corporation
- 申请人地址: Old Orchard Road Armonk, N.Y. 10504 US
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: Old Orchard Road Armonk, N.Y. 10504 US
- 代理机构: Blakemore, Frederick Norman (GB)
- 优先权: US923777 19861027
- 主分类号: H03F1/08
- IPC分类号: H03F1/08 ; H03F1/48
摘要:
A frequency response compensation circuit includes a first forward gain stage (J1, T1, T1ʹ, R1, R1ʹ, R3, R3ʹ) and a second reverse gain stage (J2, T2, T2ʹ, RE, REʹ, R2, R2ʹ) coupled to the first stage in negative feedback mode. The reverse gain stage depresses the gain of the first stage at low frequencies. When the frequency response of the reverse gain stage begins degrading, which corresponds to the frequency of the real zero of the compensation circuit, the gain of the compensation circuit begins increasing and increases until the gain of the reverse stage is zero. The circuit consists of only transistors and resistors and so can be formed as an integrated circuit. By proper selection of the resistors in the circuit, the zero of the compensation circuit can be chosen to correspond to the frequency of the pole of the uncompensated input, so as to increase the bandwidth. Multiple reverse gain stages can be included, with a selected reverse gain stage switched into connection with the first stage, so as to provide a constant frequency response for different frequency response inputs.
公开/授权文献
- EP0265763B1 Frequency response compensation circuit 公开/授权日:1992-04-15
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