Gain compression improvement on low‐power cascaded current reuse LNAs

Abstract

SUMMARYCurrent reuse low-noise-amplifiers (CRLNAs) have been the norm to achieve high-gain and low-noise figure under low-power budgets. However, conventional CRLNAs suffer from a severe lack of large-signal linearity, especially in conventional cascaded CRLNAs. This main drawback is related with the typical biasing method imposed in the output stage. To prove our point, a large-signal study is performed for a single stage commonsource in two distinct biasing situations: voltage biased and current biased. On the basis of the gathered results, a new CRLNA solution is proposed to relief the large-signal bottleneck. The suggested design is analyzed in a 0.13 μm complementary metal-oxide-semiconductor (CMOS) standard process. Post-layout simulations show 8 dB compression point improvement compared with the conventional CRLNA solution. The CRLNA draws a current of 650 μA from a 1.2 V supply. At 2.45 GHz, a power gain of 25.3 dB and a NF of 2.3 dB are achieved, while the IIP3 is À9 dBm.

A 0.6‐V sub‐mW X‐band RFSOI CMOS LNA with novel complementary current‐reused technique

“…Because the proposed LNA is basically a two‐stage CS amplifier, the effective trans‐conductance G m of the cascaded stages Mn and Mp should be optimized to achieve a maximum available gain of the LNA, while power matching is required between the stages . The inter‐stage matching network of π‐match which including Liso, Li, and Ci is employed for power conjugate matching and gain improving.…”

“…The current‐reused (C‐R) technique is proposed for low‐power application while preserving high gain, and complementary C‐R technique is proposed for low voltage and power application, but it has low gain in X‐band application . An excellent gain compression improving technique is proposed for C‐R LNA in , and a perfect selective feedback linearity enhancing technique is proposed with theory analysis . But both them do not apply to linearity improve for low‐voltage application.…”

A Novel Design and Optimization Approach for Low Noise Amplifiers (LNA) Based on MOST Scattering Parameters and the gm/ID Ratio

“…Several approaches can be found in the literature reporting integrated LNA design methodologies, with different strategies regarding the parameters analyzed in the design process [7][8][9][10][11][12][13][14][15][16]. An even larger quantity of different configurations has been proposed for specific applications [17][18][19][20][21][22][23][24][25][26].…”