Title：Configurable on-chip active RC filter
Country：China
Patent No.：201110101153.1
Legal Status：Authorized
Inventor：Baoyong Chi, Yang Xu, Xiaobao Yu, Nan Qi, Zhihua Wang
Assignee：Tsinghua University
Address：Tsinghua University,Haidian District Beijing 100084, China
Filing Date：2011-04-21
Issue Date：2014-04-16
Abstract：
The invention discloses a configurable active resistance-capacitance (RC) filter device on chip, which belongs to the technical field of electronic filters. The device consists of an inphase channel filter (I) and a quadrature channel filter (Q), and can be configured into a low-pass filter or a complex band-pass filter, so the low-pass and complex band-pass configuration of the active RC filter on chip with leap-frogging structure. Both the low-pass filter and the complex band-pass filter can be configured into third-order filters or fifth-order filters, and the power consumption of third-order filter is 3/5 of that of the fifth-order filter. A novel broadband operational amplifier is adopted, and the bandwidth of the operational amplifier is increased by adopting technologies such as active feedforward, current reusing, anti-pole splitting and the like, so the performance of the filter is improved.
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