Differential stage particularly for active filters
- 申请公布号：
- US4661780(A)
- 申请号：
- US19840612486
- 申请日期：
- 1984.05.21
- 申请公布日期：
- 1987.04.28
- 申请人：
- SGS-ATES COMPONENTI ELETTRONICI SPA
- 发明人：
- SILIGONI, MARCO;MURARI, BRUNO
- 分类号：
- H03F3/45;H03G1/00;H03H11/04;(IPC1-7):H03F3/45
- 主分类号：
- H03F3/45
- 摘要：
- Differential stage comprising a high input dynamic range differential circuit formed by first and second transistors whose emitter electrodes are connected together and to a constant current source through respective resistors, their base electrodes having an input signal applied thereto, and their collector electrodes supplying respective collector currents. The stage further comprises a dual-single converter circuit receiving the collector currents at its input and supplying a stage output current, said converter circuit including at least one variable current source and having a conversion factor which varies as a function of the variable source current.
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