A 40-GHz 4-Bit Digitally Controlled VGA With Low Phase Variation Using 65-nm CMOS Process

• Published in: IEEE microwave and wireless components letters Vol. 29; no. 11; pp. 729 - 732
• Main Authors: Tsai, Jeng-Han, Lin, Chia-Lung
• Format: Journal Article
• Language: English
• Published: IEEE 01.11.2019
• Subjects: Current steering; digital control; Gain; Gain control; Logic gates; low phase variation; millimeter-wave (MMW); Topology; Transistors; variable gain amplifier (VGA); Voltage control

A 40-GHz variable gain amplifier (VGA) with 4-bit digital gain control and low phase variation is designed and fabricated on the 65-nm CMOS process. The digital gain control mechanism is achieved using the presented digital version current steering topology. The measured gain of the VGA is between 2...