this article describes jitter and its causes and effects and shows you how to reduce it
http://www.edn.com/archives/1995/112395/24df5.htm
maintaining stability in high-order PLLs can be a chore unless you know exactly what you are doing.
http://www.edn.com/archives/1994/060994/12df3.htm
optimization technique to determine the impedance, ZB, that compensates for parasitic phase shifts that the real amplifier introduces in this high-frequency oscillator
http://www.edn.com/archives/1997/100997/21di_01.htm
information on calculating time constands on RC circuits.
http://www.edn.com/archives/1996/110796/23DI_08.htm
A brief primer, and then tips on oscillator design and construction.
http://www.electronics-tutorials.com/oscillators/oscillator-basics.htm
PLLs in SERDES circuits typically require external resistors and capacitors. Other PLLs, such as cleanup circuits with high-Q VCXOs, also use external components. Theory and practical experimentation combine to enable you to optimize these component value
http://www.edn.com/article/CA282628.html
high-performance op amps allows you to incorporate negatrons (synthesized negative resistors) into your oscillators and filters.
http://www.edn.com/archives/1994/072194/15di1.htm
An outstanding online course that starts from scratch and builds up to near-expert level material.
http://www.tpub.com/neets/book9/35.htm