Low noise output buffer capable of operating at high speeds

Details Low noise output buffer capable of operating at high speeds Low noise output buffer capable of operating at high speeds

2008-09-16

2008-09-16

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S170000

Reexamination Certificate

active

11319759

ABSTRACT:
Output buffers which operate at high speeds require delicate handling of the noise on the supply lines. This necessitates control be exercised over current slew rate not only on the rising edge of current but also on the falling edge of the current. A circuit provides control over the current slew rate on the falling edge in high speed output driver charging/discharging heavy load without affecting the speed of the driver (which otherwise would have created supply/ground bounce due to parasitics present in the bonding wires, package pins and on-chip metal interconnects in the I/O ring). The control circuit further suppresses the supply/ground noise by a very significant level while incurring small penalty in terms of silicon area and power dissipation. This circuit includes a CMOS circuit that is cross-coupled input connected to the output buffer input signals with a dummy capacitance coupled to the CMOS circuit output.

REFERENCES:
patent: 4857863 (1989-08-01), Ganger et al.
patent: 5315173 (1994-05-01), Lee et al.
patent: 5440258 (1995-08-01), Galbi et al.
patent: 5736888 (1998-04-01), Sharpe-Geisler
patent: 5777944 (1998-07-01), Knaack et al.
patent: 5877647 (1999-03-01), Vajapey et al.
patent: 6366867 (2002-04-01), Sine et al.
patent: 6646483 (2003-11-01), Shin
patent: 6696860 (2004-02-01), Lim et al.
patent: 6958638 (2005-10-01), Shibata et al.
patent: 6992511 (2006-01-01), Suzuki
patent: 7099395 (2006-08-01), Sidiropoulos et al.
patent: 7170324 (2007-01-01), Huber et al.

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