Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1997-08-18
2000-06-06
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327112, 327313, 361 91, H03K 508
Patent
active
060723513
ABSTRACT:
An output buffer including transistors which tolerate a maximum gate to source, gate to drain, or drain to source voltage ("the maximum tolerable voltage"), such as 2.7 volts, the transistors being configured to produce an output voltage significantly higher than the maximum tolerable voltage. The output buffer includes pull up transistors having source to drain paths connected in series to connect a voltage supply higher than the maximum tolerable voltage to the buffer output. The buffer further includes pull down transistors having source to drain paths connected in series to connect the buffer output to ground. The buffer further includes power supply circuitry to apply gate voltages to the pull up and pull down transistors so that the voltage potential from the source to drain of each of the pull up and pull down transistors is less than the maximum tolerable voltage. The power supply circuitry further controls gate voltages so that neither the gate to source, nor the gate to drain voltage for each of the pull up and pull down transistors exceeds the maximum tolerable voltage. Additionally, the power supply circuitry is itself configured so that voltage across the gate to source, gate to drain, or source to drain for each of its transistors does not exceed the maximum tolerable voltage. The power supply circuitry further provides a tristate configuration so that voltages can be applied to the buffer output from an external source exceeding the maximum tolerable voltage without a voltage from the gate to source, gate to drain, or source to drain of a transistor in the output buffer exceeding the maximum tolerable voltage.
REFERENCES:
patent: 4900955 (1990-02-01), Kurpan
patent: 4956569 (1990-09-01), Olivo et al.
patent: 5054001 (1991-10-01), Gillot
patent: 5157280 (1992-10-01), Schreck et al.
patent: 5493244 (1996-02-01), Pathak et al.
patent: 5650742 (1997-07-01), Hirano
patent: 5748025 (1998-05-01), Ng et al.
patent: 5767728 (1998-06-01), Michail et al.
Advanced Micro Devices , Inc.
Cunningham Terry D.
LandOfFree
Output buffer for making a 5.0 volt compatible input/output in a does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Output buffer for making a 5.0 volt compatible input/output in a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Output buffer for making a 5.0 volt compatible input/output in a will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2216569