Coded data generation or conversion – Analog to or from digital conversion – With particular solid state devices
Reexamination Certificate
2005-11-03
2008-11-04
Nguyen, Linh V (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
With particular solid state devices
C341S133000, C341S144000, C341S145000, C341S153000
Reexamination Certificate
active
07446683
ABSTRACT:
A digital current source used to mirror a reference current is provided. The digitally controlled analog current source multiplies a current from a master mirror transistor producing an output current that is a digitally controlled multiple of the reference current. The circuit comprises a plurality of one bit current mirror cells. Each one bit current mirror cell comprises a mirror transistor receiving an analog gate voltage from a master mirror transistor and providing a drain voltage, an operational amplifier configured to maintain the drain voltage for the mirror transistor equivalent to the analog gate voltage, and a switch configured to receive one control bit, the switch enabling current mirroring when the mirror voltage is substantially equivalent to the master mirror voltage. The digital current source further includes a common line summing element employed to receive and compile currents from each of the one bit current mirror cells.
REFERENCES:
patent: 5283579 (1994-02-01), Tasdighi et al.
patent: 5548288 (1996-08-01), Lueng
patent: 6246351 (2001-06-01), Yilmaz
patent: 6583744 (2003-06-01), Bright
patent: 6664909 (2003-12-01), Hyde et al.
patent: 6703956 (2004-03-01), Mueller et al.
patent: 6833801 (2004-12-01), Ostrem et al.
patent: 6927719 (2005-08-01), Siniscalchi
patent: 7030799 (2006-04-01), Lee et al.
patent: 7227483 (2007-06-01), Seo
patent: 7369076 (2008-05-01), Chung et al.
patent: 2002/0063644 (2002-05-01), Clara et al.
Myers Bigel & Sibley & Sajovec
Nguyen Linh V
Samsung Electronics Co,. Ltd.
LandOfFree
Digital current source does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital current source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital current source will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4028960