发明授权
- 专利标题: Differential amplifier arrangement with current regulating circuit and method for operating a differential amplifier arrangement
- 专利标题(中): 具有电流调节电路的差分放大器装置和用于操作差分放大器装置的方法
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申请号: US10949432申请日: 2004-09-24
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公开(公告)号: US07095281B2公开(公告)日: 2006-08-22
- 发明人: Josef Zipper , Werner Schelmbauer , Claus Stöger
- 申请人: Josef Zipper , Werner Schelmbauer , Claus Stöger
- 申请人地址: DE Munich
- 专利权人: Infineon Technologies Ag
- 当前专利权人: Infineon Technologies Ag
- 当前专利权人地址: DE Munich
- 代理机构: Eschweiler & Associates, LLC
- 优先权: DE10344878 20030926
- 主分类号: H03F3/45
- IPC分类号: H03F3/45
摘要:
Provision is made of a differential amplifier arrangement with a current source (S1), two controllable paths (T1, T2), which are in each case coupled by one terminal to the current source (S1) and the control terminals of which form the input of the differential amplifier arrangement. Via a respective cascode circuit (K1, K2), a load (L1, L2) is respectively connected to the first and second controllable paths (T1, T2). At least one tap (A1) between one of the loads and one of the cascode circuits forms an output of the differential amplifier arrangement. Provision is made of a comparison means (D1) having two inputs, which is designed for outputting a control signal dependent on a comparison. A first input is coupled to the first tap (A1) and the second input is designed for feeding a reference signal. Furthermore, the differential amplifier arrangement contains a regulable current source (G1), the control input of which is connected to the output of the comparison means and the current output of which is connected to the second terminal (P1) of at least the first controllable path (T1).
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