发明公开
EP1182778A1 Receiver comprising a digitally controlled capacitor bank
审中-公开
Empfängermit einer digital gesteuerten Kondensatorbank
- 专利标题: Receiver comprising a digitally controlled capacitor bank
- 专利标题(中): Empfängermit einer digital gesteuerten Kondensatorbank
-
申请号: EP00202622.7申请日: 2000-07-21
-
公开(公告)号: EP1182778A1公开(公告)日: 2002-02-27
- 发明人: van Rumpt, Herman Wouter
- 申请人: Semiconductor Ideas to The Market (ItoM) BV
- 申请人地址: Drielindendreef 53 4839 AH Breda NL
- 专利权人: Semiconductor Ideas to The Market (ItoM) BV
- 当前专利权人: Semiconductor Ideas to The Market (ItoM) BV
- 当前专利权人地址: Drielindendreef 53 4839 AH Breda NL
- 代理机构: Van Straaten, Joop
- 主分类号: H03J5/24
- IPC分类号: H03J5/24
摘要:
Receiver comprising an RF input filter including a digitally controlled capacitor bank (Cb) with n capacitors being controlled by a tuning control signal (Vtune) for varying the tuning frequency of the RF input filter within a tuning range. For an improvement of the receiver in price/performance ratio the n capacitors of the digitally controlled capacitor bank (Cb) are monolithically integrated, whereas the bandwidth of the tuneable RF input filter is being adjusted to the maximum relative spread of said capacitors. A continuous tuning control signal (Vtune) is being supplied through an analogue to digital converter (A/D) to said capacitor bank (Cb) and to a first input of a differential stage (DS), an output of the analogue to digital converter (A/D) being coupled through a digital to analogue converter (D/A) to a second input of a differential stage (DS), an output of the differential stage (DS) being coupled to a control terminal of a variable capacitance diode (D) being arranged in parallel to the digitally controlled capacitor bank (Cb).
信息查询
IPC分类: