Publication Date


Document Type


Committee Members

Chien-In Henry Chen (Committee Member), Saiyu Ren (Advisor), Raymond Siferd (Committee Member)

Degree Name

Master of Science in Electrical Engineering (MSEE)


This thesis presents wide tuning range in-phase and quad-phase (I/Q) output digital control oscillator (DCO) and voltage control oscillator (VCO) and a simple high performance phase frequency detector (PFD) in 90 nm CMOS technology with 1.2 V power supply. The designed I/Q output DCO has an operating frequency range from 1.1-8.2 GHz with high resolution and wide linearity by using a novel skew delay structure. At 2.02GHz oscillation frequency, the measured phase noise of I/Q output DCO is -90.43dBc/Hz at an offset of 1 MHz offset and has 5 mW of power dissipation. A complementary series coupled quadrature VCO (S-QVCO) is also implemented with measured phase noise of -114.1 dBc/Hz at an offset of 1 MHz from 3.5 GHz center frequency. The operating range of the designed S-QVCO is 3.05-4.62 GHz and has 2.6 mW power dissipation. A simple high resolution novel PFD is designed for high frequency signal detection and low jitter phase locked loop applications. The proposed PFD design can operate over a wide range of frequencies from 10 kHz to 6 GHz and can detect phase differences for inputs as small as 125 fs for all frequencies of operation and for all process corners.

Page Count


Department or Program

Department of Electrical Engineering

Year Degree Awarded