Invention Application
US20060284751A1 Complex band-pass filter for use in digital radio receiver and complex band-pass delta-sigma AD modulator using the same
失效
用于数字无线电接收机的复合带通滤波器和使用该带通滤波器的复数带通Δ-ΔAD调制器
- Patent Title: Complex band-pass filter for use in digital radio receiver and complex band-pass delta-sigma AD modulator using the same
- Patent Title (中): 用于数字无线电接收机的复合带通滤波器和使用该带通滤波器的复数带通Δ-ΔAD调制器
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Application No.: US11408941Application Date: 2006-04-24
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Publication No.: US20060284751A1Publication Date: 2006-12-21
- Inventor: Hao San , Haruo Kobayashi , Hiroki Wada , Akira Hayakawa , Hiroyuki Hagiwara , Yoshitaka Jingu , Kazuyuki Kobayashi , Toshiro Tsukada
- Applicant: Hao San , Haruo Kobayashi , Hiroki Wada , Akira Hayakawa , Hiroyuki Hagiwara , Yoshitaka Jingu , Kazuyuki Kobayashi , Toshiro Tsukada
- Applicant Address: JP Yokohama-shi
- Assignee: Semiconductor Technology Academic Research Center
- Current Assignee: Semiconductor Technology Academic Research Center
- Current Assignee Address: JP Yokohama-shi
- Priority: JPP2005-175242 20050615
- Main IPC: H03M3/00
- IPC: H03M3/00
Abstract:
In a first-order complex band-pass filter, multiplexers are alternately switched over between time intervals of phases A and B, where the multiplexers includes two multiplexers provided at input and output stages, and a multiplexer provided in a feedback circuit of each of first-order filters and being switching over whether to invert a sign of a feedback signal. Then in a circuit part sandwiched between the multiplexers, a processing performed by an I circuit part and a processing performed by a Q circuit part are alternately switched over so that a sign of a signal inputted to an adder is inverted.
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