Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Patent
1996-01-30
1997-10-07
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
327379, H03K 100
Patent
active
056752709
ABSTRACT:
A data line for an integrated circuit such as field programmable gate array, has a relatively fast rise time, consumes relatively low amount of current, and maintains a relatively fast fall time. A data conductor is connected to a circuit element providing a current path from the data conductor to a source of the supply voltage. A plurality of data-in drivers are connected to the data conductor which act in one state to pull the data conductor from the supply voltage to ground, and act in another state to present high impedance to the data conductor. A dynamic element is included, which connects an additional current path between the data line and the supply during transitions from ground to the supply, and which disconnects the additional current path otherwise. This speeds up the transitions from low to high, while not opposing the transitions from high to low. The dynamic element comprises of p-channel transistor having a source connected to the supply source, an n-channel transistor having its drain connected to the drain of the p-channel transistor, and its source connected by a current path to the data conductor. An inverter with a low trip point having its input connected to the data conductor and its output connected to the gate of the p-channel transistor provides feedback to turn the p-channel transistor on when the data line goes high. An inverting Schmitt trigger has its input connected to the data conductor and its output connected to the gate of the n-channel transistor. The Schmitt trigger enables the feedback with a hysteresis characteristic, which has a trip point on transitions from low to high relatively high, and trip point on transitions from high to low relatively low.
REFERENCES:
patent: 5306965 (1994-04-01), Asprey
patent: 5402081 (1995-03-01), Wong et al.
patent: 5488322 (1996-01-01), Kaplinsky
patent: 5539341 (1996-07-01), Kuo
Harms Jeanette S.
Tran Toan
Xilinx , Inc.
LandOfFree
Data line with dynamic pull-up circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data line with dynamic pull-up circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data line with dynamic pull-up circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2360425