Low Phase Noise and Wide Tuning Range VCO Using the MOS Differential Amplifier with Active Load

• 作者: Cher-Shiung Tsai Kwang-Jow Gan Ming-Shin Lin
• 来源期刊: 电路与系统(英文)
• 学科: 工学
• 关键词: Voltage-Controlled OSCILLATOR (VCO) Differential AMPLIFIER Phase Noise Tuning RANGE
• 年，卷（期）: 2012,（4）
• 页码范围: 307-310
• 页数: 4页
• 分类号: TN7

摘要

We demonstrate the design of a novel voltage-controlled oscillator (VCO), which is based on a metal-oxide-semiconductor field-effect transistor (MOS) differential amplifier with active load. This VCO achieves low phase noise and wide tuning range. The phase noise is –120 dBc/Hz at 600 KHz offset from a 1.216 GHz carrier frequency. This value is comparable to that of a LC-based integrated oscillator. The operating frequency can be tuned from 117 MHz to 1.216 GHz with the supply voltage varying from 1.3 V to 3.3 V. Therefore, the tuning range is about 90.38% which is larger than most of the LC and ring oscillator. The VCO circuit, which is constructed using a standard 0.35 μm CMOS technology, occupies only 26.25 × 7.52 μm2 die area and dissipated 10.56 mW under a 3.3 V supply voltage.