Invention Grant
US08405452B2 Filtering arrangement, filtering method and current sensing arrangement 有权
滤波布置,滤波方法和电流检测布置

  • Patent Title: Filtering arrangement, filtering method and current sensing arrangement
  • Patent Title (中): 滤波布置,滤波方法和电流检测布置
  • Application No.: US12746369
    Application Date: 2008-11-14
  • Publication No.: US08405452B2
    Publication Date: 2013-03-26
  • Inventor: Pramod Singnurkar
  • Applicant: Pramod Singnurkar
  • Applicant Address: AT Unterpremstaetten
  • Assignee: austriamicrosystems AG
  • Current Assignee: austriamicrosystems AG
  • Current Assignee Address: AT Unterpremstaetten
  • Agency: Cozen O'Connor
  • Priority: EP07023475 20071204
  • International Application: PCT/EP2008/065574 WO 20081114
  • International Announcement: WO2009/071430 WO 20090611
  • Main IPC: H03K5/00
  • IPC: H03K5/00
Filtering arrangement, filtering method and current sensing arrangement
Abstract:
A filtering arrangement comprises a reference voltage input (1) and a compensation current arrangement (10) coupled to the reference voltage input (1) and configured to provide a control current at a current output (2) as a function of a voltage at the reference voltage input (1). The filtering arrangement also comprises a first and a second current source (20, 30) each having a control input (4, 5) coupled to the current output (2), a first and a second filter input (7, 8), and a first transistor (T1) and a second transistor (T2). The first transistor (T1) has a first connection (T11), a second connection (T12) and a control connection (T1c), where its first connection (T11) is coupled to the first current source (20) and its second connection (T12) is coupled to the first filter input (7) through a first resistor (R1). The second transistor (T2) has a first connection (T21), a second connection (T22) and a control connection (T2c), where its first connection T21) is coupled to the second current source (30), its second connection (T22) is coupled to the second filter input (8) through a second resistor (R2) and its control connection (T2c) is coupled to its first connection (T21) and to the control connection (T1c) of the first transistor (T1). A capacitive element (C1) is coupled between the first connection (T11) of the first transistor (T1) and the second connection (T22) of the second transistor (T2) and a filter output (6) is coupled to the first connection (T11) of the first transistor (T1).
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