High performance, wide tuning range 65nm CMOS tunable Voltage Controlled Ring Oscillator up to 11 GHz

摘要

This work proposes a novel tunable Voltage Control Ring Oscillator (VCRO), which exhibits high performance in terms of phase noise and wide tuning range. This oscillator is designed to achieve an output frequency range between 2.4 and 11GHz. The proposed oscillator utilizes a band selection technique, in order to maintain an almost constant Kvco equal to 4.6GHz/V. In addition, a current trimming source is used in order to compensate over process and temperature variations. Finally, the oscillator is designed using 65nm CMOS process with a supply voltage of 1V featuring -88.4dBc/Hz phase noise, almost rail-to-rail differential output and 20mA maximum current consumption at 11GHz.