Wideband Balun-LNAs using asymmetric CCC technique for WLAN and mobile WiMAX applications. (August 2019)

• Record Type: Journal Article
• Authors: Kishore, K. Hari; Venkataramani, B.; Raju, B. Kasi
• Is Part Of: Microelectronics journal. Volume 90(2019)
• Page Start: 105
• Page End: 116
• Publication Date: 2019-08
• Subjects: Low noise amplifier -- Noise cancellation -- Low power -- Wideband -- Asymmetric CCC; Microelectronics -- Periodicals; Microélectronique -- Périodiques; Microelectronics; Electronic journals; Journals - contents and abstracts; Periodicals; 621.3805
• DOI: 10.1016/j.mejo.2019.05.021
• Languages: English
• ISSNs: 0959-8324

Abstract

Abstract: Capacitive Cross-Coupling (CCC) buffers require the output impedances of their drivers to be equal. For drivers with unequal output impedances such as the CG-CS balun-LNA, an asymmetric CCC technique denoted as A-CCC is proposed in this paper. Two Wideband Balun LNAs– LNA1 which uses A-CCC and an auxiliary current reuse amplifier (ACRA), and LNA2 which uses A-CCC, ACRA and shunt peaking are proposed to achieve noise figure (NF) less than 2 ​dB. The proposed LNAs are implemented in 0.18 ​μm CMOS technology and are evaluated through post-layout simulations. It is found that NF, Gain, 3dB band of (1.81–2.5 ​dB, 23.7–26.7 ​dB, 1 – 4 ​GHz) and (1.97–4.14 ​dB, 25–28 ​dB, 1 – 6 ​GHz) are obtained for LNA1 and LNA2 respectively. The average IIP3, IIP2 of LNA1 and LNA2 are found to be (−8.45 dBm, +11.73 dBm) and (−2.59 dBm, +17.42 dBm). The LNA1 and LNA2 consume 6.7 ​mW and 6.53 ​mW power from a 1.2 ​V supply for core areas of 0.25 ​mm 2, 0.85 mm 2 .