A Low-Phase-Noise CMOS Quadrature Voltage-Controlled Oscillator Using a Self-Injection-Coupled Technique

作者：Lin Chi Hsien^*; Chang Hong Yeh

来源：IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS, 2012, 59(10): 623-627.

DOI：10.1109/TCSII.2012.2213364

• CMOS
• parallel-coupled quadrature voltage-controlled oscillator (QVCO) (P-QVCO)
• phase noise
• self-injection-coupled (SIC) QVCO (SIC-QVCO)

A modified coupled method for multiphase oscillator is proposed and demonstrated in a standard 0.18-mu m CMOS technology. A self-injection-coupled (SIC) technique is used to couple two current-reused differential voltage-controlled oscillators (VCOs). Compared with the conventional parallel-coupled quadrature VCO (QVCO), the proposed QVCO using the SIC technique presents low phase noise without increasing dc power consumption. The proposed SIC-QVCO at 16.28 GHz demonstrated a low phase noise of -125 dBc/Hz at 1-MHz offset frequency and a tuning range of 290 MHz. The dc supply voltage and current consumption are 1.8 V and 6 mA, respectively. The chip size of the proposed SIC-QVCO is 0.75 x 0.6 mm(2).

• 出版日期2012-10
• 单位中央民族大学