Electronic digital logic circuitry – Signal sensitivity or transmission integrity – Bus or line termination
Reexamination Certificate
2005-05-17
2005-05-17
Chang, Daniel D. (Department: 2819)
Electronic digital logic circuitry
Signal sensitivity or transmission integrity
Bus or line termination
C326S027000, C326S086000
Reexamination Certificate
active
06894529
ABSTRACT:
Impedance-matched output driver circuits include a first totem pole driver stage and a second totem pole driver stage. The first totem pole driver stage includes at least one PMOS pull-up transistor and at least one NMOS pull-down transistor therein that are responsive to a first pull-up signal and a first pull-down signal, respectively. The second totem pole driver stage has at least one NMOS pull-up transistor and at least one PMOS pull-down transistor therein that are responsive to a second pull-up signal and second pull-down signal, respectively. The linearity of the output driver circuit is enhanced by including a first resistive element that extends between the first and second totem pole driver stages. The first resistive element has a first terminal, which is electrically coupled to drain terminals of the at least one PMOS pull-up transistor and the at least one NMOS pull-down transistor in the first totem pole driver stage, and a second terminal, which is electrically coupled to source terminals of the at least one NMOS pull-up transistor and the at least one PMOS pull-down transistor in the second totem pole driver stage.
REFERENCES:
patent: 4731553 (1988-03-01), Van Lehn et al.
patent: 4829199 (1989-05-01), Prater
patent: 4833349 (1989-05-01), Liu et al.
patent: 4933574 (1990-06-01), Lien et al.
patent: 5122690 (1992-06-01), Bianchi
patent: 5153450 (1992-10-01), Ruetz
patent: 5166555 (1992-11-01), Kano
patent: 5293082 (1994-03-01), Bathaee
patent: 5313435 (1994-05-01), Kim et al.
patent: 5319258 (1994-06-01), Ruetz
patent: 5497105 (1996-03-01), Oh et al.
patent: 5528192 (1996-06-01), Agiman
patent: 5559447 (1996-09-01), Rees
patent: 5717343 (1998-02-01), Kwong
patent: 5739714 (1998-04-01), Gabara
patent: 5834948 (1998-11-01), Yoshizaki et al.
patent: 5880606 (1999-03-01), Griesbach
patent: 5892371 (1999-04-01), Maley
patent: 5991908 (1999-11-01), Baxter et al.
patent: 6014046 (2000-01-01), Douse et al.
patent: 6031394 (2000-02-01), Cranford, Jr. et al.
patent: 6057710 (2000-05-01), Singh
patent: 6064227 (2000-05-01), Saito
patent: 6071314 (2000-06-01), Baxter et al.
patent: 6081132 (2000-06-01), Isbara
patent: 6091260 (2000-07-01), Shamarao
patent: 6118310 (2000-09-01), Esch, Jr.
patent: 6133749 (2000-10-01), Hansen et al.
patent: 6205086 (2001-03-01), Hanzawa et al.
patent: 6208168 (2001-03-01), Rhee
patent: 6225824 (2001-05-01), Madhu et al.
patent: 6242942 (2001-06-01), Shamarao
patent: 6285215 (2001-09-01), Voshell
patent: 6316977 (2001-11-01), Sargeant
patent: 6326821 (2001-12-01), Gabara
patent: 6351172 (2002-02-01), Ouyang et al.
patent: 6353346 (2002-03-01), Chan
patent: 6356102 (2002-03-01), Klein et al.
patent: 6362656 (2002-03-01), Rhee
patent: 6388499 (2002-05-01), Tien et al.
patent: 6420914 (2002-07-01), Hasegawa
patent: 6433579 (2002-08-01), Wang et al.
patent: 6437599 (2002-08-01), Groen
patent: 6456124 (2002-09-01), Lee et al.
patent: 6509770 (2003-01-01), Gossmann et al.
patent: 6529082 (2003-03-01), Boerstler et al.
patent: 6552565 (2003-04-01), Chang et al.
patent: 6570405 (2003-05-01), Lien
patent: 6604227 (2003-08-01), Foltin et al.
patent: 6650156 (2003-11-01), Reid et al.
patent: 20010000949 (2001-05-01), Rhee
Fan et al., “On-Die Termination Resistors with Analog Impedance Control for Standard CMOS Technology,” IEEE Journal of Solid-State Circuits, vol. 38, No. 2, Feb. 2003, pp 361-364.
Butka Brian K.
Chong Yew-Keong
Klein David J.
Shamarao Prashant
Shao XinXin
Chang Daniel D.
Integrated Device Technology Inc.
Myers Bigel & Sibley Sajovec, PA
LandOfFree
Impedance-matched output driver circuits having linear... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Impedance-matched output driver circuits having linear..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impedance-matched output driver circuits having linear... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3430512