Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Clock or pulse waveform generating
Reexamination Certificate
2006-10-24
2006-10-24
Mis, David (Department: 2817)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Clock or pulse waveform generating
C327S299000
Reexamination Certificate
active
07126403
ABSTRACT:
A new clock driver is described for the use in the phase detector of a clock and data recovery circuit (CDR). By building a resonant LC tank, whose center frequency is similar to the clock frequency, a low power clock driver is realized. A method based upon minimizing power consumption is described for determining the value of the programmable capacitance. A programmable capacitance adjusts the center frequency of the tank so it matches the frequency of the clock and a finite state machine at startup determines the value of this programmable capacitance. A criterion for tuning the center frequency of the tank is to choose the capacitance which leads to the lowest power consumption. A low Q tank affords a reasonable compromise between power efficiency and performance in the CDR circuit.
REFERENCES:
patent: 5559463 (1996-09-01), Denker et al.
patent: 5734285 (1998-03-01), Harvey
patent: 6108000 (2000-08-01), Bolotski et al.
patent: 6650163 (2003-11-01), Burns et al.
“A 40-Gb/s Clock and Data Recovery Circuit in 0.18-μm CMOS Technology,” Lee et al.,IEEE J. of Solid-State Circuits,vol. 38, n. 12 (Dec. 2003).
“A Two-Chip 1.5-GBd Serial Link Interface,” Walker et al.,IEEE J. of Solid-State Circuits,vol. 27, n. 12 (Dec. 1992).
“A Plastic Packaged 10 Gb/s BiCMOS Clock and Data Recovering 1:4-Demultiplexer with External VCO,” Hauenschild et al.,IEEE J. of Solid-State Circuits,vol. 31, n. 12 (Dec. 1996).
“An 800mW 10Gb Ethernet Transceiver in 0.13μm CMOS,” Sidiropoulos et al.,IEEE International Slid-State Circuits Conference,session 9 (2004).
Kenney, Jr. John G.
Reddy Viswabharath
Titus Ward Steven
Analog Devices Inc.
Gauthier & Connors LLP
LandOfFree
LC tank clock driver with automatic tuning does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with LC tank clock driver with automatic tuning, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and LC tank clock driver with automatic tuning will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3702937