Integrated-Transformer-Based Impedance Matching Method: Impedance Matching With Transformers

Lancon, Leo; Vallee, Hugo; Montoriol, Gilles; Brunelli, Fabien; Taris, Thierry

doi:10.1109/mmm.2022.3158033

Cited by 2 publications

(1 citation statement)

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“…Integrated transformer design is gaining prominence in mm-Wave circuit design. Several works have been published recently regarding the design and modeling of integrated transformers for various applications [11][12][13]. Nevertheless, this element produces extra losses in the signal path due to the limited values of the magnetic coupling coefficient (k) and quality factor (Q) achievable in integrated technologies, which can negatively impact the NF of the LNA.…”

Section: Introductionmentioning

confidence: 99%

A 0.38 V Fully Differential K-Band LNA with Transformer-Based Matching Networks

et al. 2023

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The implementation of a 0.38 V K-band low-power fully differential low-noise amplifier (LNA) in a 45 nm silicon-on-insulator (SOI) process is presented. The proposed architecture employs a two-stage approach with transformer-based interstage matching networks to minimize circuit area. The proposed LNA covers the frequency range from 20.3 to 24.1 GHz, it achieves a noise figure (NF) as low as 2.2 dB, and a gain of 12.9 dB, with a power consumption of 11.7 mW from a 0.38 V DC supply in a very compact area (0.15 mm2) excluding pads. Non-linearity simulations show the proposed circuit achieves a Po1dB of −7.3 dBm, and an OIP3 (Output Third Order Intercept) of 7 dBm. The transformers allow improved area use since they are simultaneously used as matching networks, RF chokes to bias the active devices, baluns at the input and output terminals to convert the single-ended signal into differential mode, and vice versa, and facilitates the interconnection with the upcoming stages. We used a state-of-the-art tool that generates the desired inductances to perform impedance matching for a given frequency and coupling factor value. A comparison with similar works proves the proposed LNA achieves a very low NF and the lowest power consumption reported in a differential circuit.

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Section: Introductionmentioning

confidence: 99%