题目/Title：A radio-frequency amplifier with tunable high-Q RF bandpass filtering for SAW-less wireless receivers

作者/Author：祁楠,池保勇,徐阳,王志华
                        Nan Qi,Baoyong Chi,Yang Xu,Zhihua Wang

期刊/Journal：Electronics Letters

年份/Issue Date：2013May

卷（期）及页码/Volume（No.）&pages：Vol.49, No.10, pp. 656 - 657

摘要/Abstract：
An inductor-less on-chip radio frequency bandpass filtering (RF-BPF) technique with tunable centre frequency is proposed to replace the bulky and expensive external SAW filter. The centre frequency of the BPF not only tracks the local oscillation (LO) frequency (fLO), but also can be shifted from fLO by a controllable offset for low-IF applications. The RF-BPF have been embedded into a single-ended-input differential-output radio frequency amplifier (RFA) and implemented in 65nm CMOS. The RFA draws 3.5mA DC current from a 2.5V power supply. Measurement results show that the BPF achieves 16dB attenuation at 150MHz offset from the 1.5GHz centre frequency, and 20MHz tunable range without changing the LO frequency.