Duty cycle correction of a multi-gigahertz clock signal with...

Details Duty cycle correction of a multi-gigahertz clock signal with... Duty cycle correction of a multi-gigahertz clock signal with...

2005-09-16

2009-02-24

Pathak, Sudhanshu C (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C327S172000, C327S175000, C327S122000, C700S028000, C331S048000, C330S010000

Reexamination Certificate

active

07496155

ABSTRACT:
A clock recovery circuit includes a crossover adjustment circuit operable to adjust a crossover point to adjust a corresponding duty cycle. The adjustment circuit comprises a feedback adjustment combining element which is implemented as summing elements and a crossover point control clock amplifier, an operational amplifier with a resistor in place of a low pass filter at an input of the operational amplifier and feedback driver. The summing element within the feedback adjustment combining element combines input clocks with feedback signals, the crossover point control clock amplifier includes adjustment driver, the two cross coupled PMOS along with the resistor connected between them, reshape input clocks, adjust cross over point and provide output clocks with DCD corrected. A modified Miller capacitor comprising a resistor in series with a capacitor across a drain and gate of a cascode transistor pair is utilized in an output stage to adjust corner frequencies.

REFERENCES:
patent: 4959557 (1990-09-01), Miller
patent: 5280424 (1994-01-01), Rony et al.
patent: 6016081 (2000-01-01), O'Shaughnessy
patent: 6084452 (2000-07-01), Drost et al.
patent: 6356129 (2002-03-01), O'Brien et al.
patent: 6492868 (2002-12-01), Kirn
patent: 6593789 (2003-07-01), Atallah et al.
patent: 6611218 (2003-08-01), Lu et al.
patent: 6864728 (2005-03-01), Lu

Affiliated with

Also associated with

Rating

Duty cycle correction of a multi-gigahertz clock signal with... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Duty cycle correction of a multi-gigahertz clock signal with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Duty cycle correction of a multi-gigahertz clock signal with... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4100375