Title :
A Low Jitter Programmable Frequency Synthesizer for 4.25Gbps Serial Link Applications
Author :
Kelkar, Ram ; Flye, Dave ; Malladi, Anjali ; Natonio, Joseph ; Scoville, Chris ; Short, Ken ; Thiagarajan, Pradeep
Author_Institution :
IBM Microelectron. Div., Essex Junction, VT
Abstract :
This paper describes a wide-range programmable frequency synthesizer building block for 4.25Gbps serial link applications. A unique feature of the design is the use of variable gain charge pumps to adjust loop gain as well as damping in order to minimize output jitter. The synthesizer architecture includes pre and post dividers to maximize programmability. A novel implementation of the high speed divide circuit is also described
Keywords :
frequency synthesizers; high-speed integrated circuits; jitter; programmable circuits; 4.25 Gbit/s; high speed divide circuit; loop gain; low jitter programmable frequency synthesizer; serial link applications; variable gain charge pumps; Bandwidth; Charge pumps; Clocks; Damping; Frequency synthesizers; Gain; Jitter; Microelectronics; Phase locked loops; Voltage-controlled oscillators;
Conference_Titel :
SOC Conference, 2005. Proceedings. IEEE International
Conference_Location :
Herndon, VA
Print_ISBN :
0-7803-9264-7
DOI :
10.1109/SOCC.2005.1554443
