| Title |
Design of an Inductorless Feedforward Noise-Canceling LNA for a 2.4GHz ISM-Band IoT Receiver |
| Authors |
김하진(Ha jin Kim) ; 김영식(Young) |
| DOI |
https://doi.org/10.5573/ieie.2026.63.9.52 |
| Keywords |
Inductorless LNA; Noise canceling; Feedforward; IoT receiver |
| Abstract |
This paper presents an inductorless feedforward noise-canceling low-noise amplifier (LNA) for 2.4GHz ISM-band IoT receivers. The proposed circuit adopts a complementary PMOS-NMOS current-reuse structure with resistive feedback to maximize current efficiency and minimize power consumption. In addition, a feedforward auxiliary path is employed to cancel the noise of the input-stage transistors. Designed in a 28nm CMOS process, the proposed LNA consumes 4.4mW from a 1V supply and achieves a gain (S21) of 19.2dB and a noise figure (NF) of 3.45dB at 2.4GHz. The input third-order intercept point (IIP3) is ?12.3dBm and the 1dB compression point (P1dB) is ?25.3dBm, while the input and output reflection coefficients (S11, S22) are ?17.3dB and ?26.4dB, respectively. Excluding the pads, the core occupies an area of 0.00412mm² by eliminating on-chip inductors. These results demonstrate that the proposed structure is suitable for low-power IoT wireless receiver applications. |