发明授权
US06239653B1 Biquadratic basic cell for programmable analog time-continuous filter
失效
可编程模拟时间连续滤波器的二次基本单元
- 专利标题: Biquadratic basic cell for programmable analog time-continuous filter
- 专利标题(中): 可编程模拟时间连续滤波器的二次基本单元
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申请号: US08984107申请日: 1997-12-03
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公开(公告)号: US06239653B1公开(公告)日: 2001-05-29
- 发明人: Frencesco Rezzi , Rinaldo Castello , Marco Cazzaniga , Ivan Bietti
- 申请人: Frencesco Rezzi , Rinaldo Castello , Marco Cazzaniga , Ivan Bietti
- 优先权: EP96830603 19961204
- 主分类号: H03K500
- IPC分类号: H03K500
摘要:
The invention relates to an elementary biquadratic cell for programmable time-continuous analog filters. The biquadratic cell is coupled between a first voltage reference and a second voltage reference and has at least one pair of input terminals and first and second pairs of output terminals. The cell includes a pair of half-cells, which half-cells are structurally identical with each other. Each half-cell comprises at least a first transistor coupled between the first and the second voltage reference and having a base terminal connected to a respective one of the input terminals. Each half-cell further comprises second and third transistors coupled between the first and second voltage references. The second transistor has a base terminal connected to the first output terminal of the first pair of output terminals and a collector terminal connected to the first output terminal of the second pair of output terminals. The third transistor has a collector terminal connected to the first output terminal of the first pair of output terminals and a base terminal connected to the second output terminal of the second pair of output terminals.