Programmable slew rate control for differential output

Details Programmable slew rate control for differential output Programmable slew rate control for differential output

2006-11-07

2006-11-07

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Pulse shaping

C326S086000, C327S170000

Reexamination Certificate

active

07132847

ABSTRACT:
A programmable technique is used to control the slew rate of a differential output buffer. A method controls the slew rate (SR) by changing an “on” resistance of the switches used to steer the current. This can be accomplished by (i) using different size switches or (ii) changing the slew rate of the predrivers which drive the final switches. The latter approach has the advantage that it only temporarily increases the “on” resistance, which does not cause any headroom problems after the transient. A specific application is for the differential outputs of a programmable logic integrated circuits.

REFERENCES:
patent: 5066873 (1991-11-01), Chan et al.
patent: 5315174 (1994-05-01), Chang et al.
patent: 5638007 (1997-06-01), Sabin
patent: 5958026 (1999-09-01), Goetting et al.
patent: 5986489 (1999-11-01), Raza et al.
patent: 6020757 (2000-02-01), Jenkins, IV
patent: 6038386 (2000-03-01), Jain
patent: 6154059 (2000-11-01), Cheung et al.
patent: 6184703 (2001-02-01), Vest et al.
patent: 6184708 (2001-02-01), Jenkins, IV
patent: 6218858 (2001-04-01), Meonon et al.
patent: 6229336 (2001-05-01), Felton et al.
patent: 6242941 (2001-06-01), Vest et al.
patent: 6246270 (2001-06-01), Wang et al.
patent: 6256235 (2001-07-01), Lee
patent: 6307414 (2001-10-01), Hoff
patent: 6411126 (2002-06-01), Tinsley et al.
patent: 6417708 (2002-07-01), Fiedler
patent: 6433579 (2002-08-01), Wang et al.
patent: 6836168 (2004-12-01), Lesea et al.
patent: 6836290 (2004-12-01), Chung et al.
patent: 6870390 (2005-03-01), Groen et al.
patent: 6870399 (2005-03-01), Ngo et al.
patent: 2005/0001653 (2005-01-01), Ahmad
Altera Data Sheet, “Max 7000: Programmable Logic Device Family,” Altera Corp., ver. 6.6, Jun. 2003, pp. 1-21.
Altera Data Sheet, “Max 9000: Programmable Logic Device Family,” Altera Corp., ver. 6.5, Jun. 2003, pp. 1-46.
Altera Data Sheet, “FLEX 10K: Embedded Programmable Logic Device Family,” Altera Corp., ver. 4.2, Jan. 2003, pp. 1-40.
Cyclone Device Handbook, vol. 1, Chapter 2, “Cyclone Architecture,” Altera Corp., CS1002-1.2, Oct. 2003, pp. 2-1 to 2-56.

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