TY - JOUR AU - Myung Hun Lee AU - Ku Duck Kwon PY - 2021/09/27 Y2 - 2024/03/28 TI - A 2.4 GHz Low Power Low-IF Receiver Employing OOK and FSK Dual-Mode Demodulator for IoT Applications JF - Journal of Integrated Circuits and Systems JA - JICAS VL - 7 IS - 4 SE - Articles DO - 10.23075/jicas.2021.7.4.003 UR - http://jicas.idec.or.kr/index.php/JICAS/article/view/72 AB - In this paper, a 2.4 GHz low-power low-IF receiver employing a dual-mode demodulator for on-off keying (OOK) and frequency-shift keying (FSK) signals is presented for Internet of Things (IoT) applications. The switched dual-mode demodulator can demodulate both OOK and FSK signals. The proposed receiver consists of a low-noise transconductance amplifier, single-balanced current-mode passive mixer, transimpedance amplifier, variable gain amplifier, and dual-mode demodulator. The proposed receiver was designed in a 65-nm CMOS process and mainly simulated at 2.4 GHz. The receiver achieves a noise figure of 9.9 dB, a maximum conversion gain of 74 dB, and an input-referred third-order intercept point of −26.3 dBm. The active die area of the designed receiver is 0.53 mm2, and it draws a bias current of 1.8 mA from a nominal supply voltage of 1 V. ER -