Output driver circuit with automatic slew rate control and...

Details Output driver circuit with automatic slew rate control and... Output driver circuit with automatic slew rate control and...

2005-06-07

2005-06-07

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Slope control of leading or trailing edge of rectangular or...

C327S108000

Reexamination Certificate

active

06903589

ABSTRACT:
The output signal from an output driver is compared with first and second reference voltages. A first comparison output signal is generated which exhibits a voltage transition when the output signal reaches the first reference voltage, and a second comparison output signal is generated which exhibits a voltage transition when the output signal reaches the second reference voltage. First and second pulse widths values are then compared. The first pulse width value corresponds to a time delay difference between the voltage transition of the first comparison output signal and the voltage transition of the second comparison output signal, and the second pulse width value corresponds to a target slew rate of the output signal from the output driver. The slew rate of the output signal is decrease when the first pulse width value is smaller than the second pulse width value, and the slew rate of the output signal is increased when the first pulse width value is larger than the second pulse width value.

REFERENCES:
patent: 6535039 (2003-03-01), Nanba et al.

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