Electronic digital logic circuitry – Interface – Logic level shifting
Reexamination Certificate
2008-07-07
2011-11-22
Ismail, Shawki S (Department: 2819)
Electronic digital logic circuitry
Interface
Logic level shifting
C327S333000, C326S080000
Reexamination Certificate
active
08063662
ABSTRACT:
In one aspect, a level shifter for shifting a voltage level from a first voltage level to a second voltage level and having a predictable power-up state is provided. The level shifter comprises a first input and a second input forming a differential input to receive signals at the first voltage level, a first output and a second output forming a differential output to provide output signals at the second voltage level, and at least one circuit element coupled between the differential input and the differential output to pull the first output to a lower voltage level than the second output during power-up so that the level shifter powers-up in a desired state.
REFERENCES:
patent: 5418477 (1995-05-01), Dhong et al.
patent: 5457420 (1995-10-01), Asada
patent: 6043699 (2000-03-01), Shimizu
patent: 6094083 (2000-07-01), Noda
patent: 6373285 (2002-04-01), Konishi
patent: 6414534 (2002-07-01), Wang et al.
patent: 6489828 (2002-12-01), Wang et al.
patent: 6556061 (2003-04-01), Chen et al.
patent: 6650168 (2003-11-01), Wang et al.
patent: 6781413 (2004-08-01), Kihara et al.
patent: 6864718 (2005-03-01), Yu
patent: 6894537 (2005-05-01), Wert
patent: 7005908 (2006-02-01), Lee et al.
patent: 7038492 (2006-05-01), Wu et al.
patent: 7573313 (2009-08-01), Johansson et al.
patent: 2005/0184788 (2005-08-01), Johansson et al.
Wang et al. “Level Shifters for High-speed 1-V to 3.3-V Interfaces in a 0.13-pm Cu-Interconnection/Low-k CMOS Technology,” inInternational Symposium on VLSI Technology, Systems, and Applications, Apr. 18-20, 2001, pp. 307-310.
“Texas Instruments Translation Overview,” Texas Instruments, Inc., 2003, pp. 1-4.
“Voltage Level Translating Circuit,” IBM Technical Disclosure Bulletin, Oct. 1959, 1 page.
“Voltage Level Translation Circuit,” IBM Technical Disclosure Bulletin, Jun. 1975, 2 pages.
Rakes, “Circuit Circus,” Popular Electronics, Mar. 1999, pp. 59-62.
“Cascaded Common-Gate FET IC Provides Flexible Level Translation,” Electronic Design, Penton Media, Inc., Jul. 10, 2000, 1 page.
Foley David P.
Li Hongxing
Analog Devices Inc.
Ismail Shawki S
Kenyon & Kenyon LLP
White Dylan
LandOfFree
Methods and apparatus for predictable level shifter power-up... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for predictable level shifter power-up..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for predictable level shifter power-up... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4304836