Off chip driver (OCD) with variable drive capability for noise c

Details Off chip driver (OCD) with variable drive capability for noise c Off chip driver (OCD) with variable drive capability for noise c

1997-07-31

2000-01-11

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327379, 326 27, 326 87, H03B 100, H03K 300

Patent

active

060140461

ABSTRACT:
An Off Chip Driver (OCD) having a high, a low and a high impedance (Hi-Z) state. The OCD includes an up-level pre-drive, a down-level pre-drive and a driver. The driver mirrors current in the up-level pre-drive and down-level pre-drive. Both pre-drive circuits have an unbalanced input-dependant delay to quickly turn off/on the on and off driver devices and, after a delay, reduce the drive on the turned on device to a steady state level. The delay may have a fixed length set by an inverter chain or may be dependent upon output voltage.

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