A variable gain amplifier based on dual gain control technology for ultra-wideband applications

In this paper, a dual gain control (DGC) technology is proposed to achieve large gain variation range and good gain flatness for every controllable gain in ultra wide frequency band. The DGC technology includes a modified current mirror structure and a dynamic signal feedback structure. Based on the DGC technology, a variable gain amplifier with both large dynamic gain variable range and good gain flatness in the ultrawideband of 3.1~10.6 GHz are realized.