Design of 2–7 GHz Voltage-Controlled Oscillator Using Multi-stage Current Starved Configuration

Abstract

In this article, a three-stage and five-stage voltage-controlled oscillator (VCO) using current starved configuration has been proposed. Among the two, only a three-stage VCO gives the required bandwidth of 5 GHz. Current starved VCO is designed using complementary metal oxide semiconductor (CMOS) technology. The oscillating output frequency bandwidth (2–7 GHz) is considered as the main objective for the proposed circuit. The proposed three-stage VCO circuit uses low supply voltage of 1 V, low power of 29.93 uW. Transient analysis and periodic steady state (PSS) analysis are performed, and after simulation, a wide frequency bandwidth of 5 GHz was obtained. The phase noise for the three-stage VCO at 1 GHz is −132 dBc/Hz. The circuit has been designed in Cadence Virtuso using gpdk 45 nm CMOS technology with supply voltage of 1 V.