A Low Power, Startup Ensured and Constant Amplitude Class-C VCO in 0.18 mu m CMOS

作者：Chen Jian^*; Jonsson Fredrik; Carlsson Mats; Hedenas Charlotta; Zheng Li Rong

来源：IEEE Microwave and Wireless Components Letters, 2011, 21(8): 427-429.

DOI：10.1109/LMWC.2011.2160620

• Class-C
• current shaping
• phase noise
• pulse wave
• startup
• voltage controlled oscillator (VCO)

A low power and robust class-C voltage-controlled oscillator (VCO) is presented in this letter. It features 1) an automatic startup loop to achieve the optimal point and address the inherent risk of startup failure and 2) a digital amplitude control loop to stabilize amplitude and enhance the PVT ( process, voltage and temperature) tolerance. The design is implemented in a 0.18 mu m CMOS process. Measurement demonstrates the VCO has a 20% tuning range and phase noise of -123.0 dBc/Hz at 1 MHz offset from a 3.1 GHz carrier while consuming 1.57-mW power from a 1 V supply, yielding a Figure-of-Merit (FoM) of 191.1. While operating under the minimum power of 560 mu W, it produces -111.3 dBc/Hz phase noise at 1 MHz offset from a 3.1 GHz carrier showing a 183.8 FoM.

• 出版日期2011-8
• 单位复旦大学