Timed one-shot active termination device

Details Timed one-shot active termination device Timed one-shot active termination device

1997-08-11

2000-06-06

Ton, My-Trang Nu

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

H03K 300, H03K 19094

Patent

active

060723424

ABSTRACT:
A circuit for driving GTL-type buses actively drives a bus trace towards a first reference voltage when a signal in a first voltage state is detected at its input and actively drives the bus trace towards a second reference voltage for a selected period when the signal at its input transitions from the first voltage state to a second voltage state. The circuit includes a flip-flop for storing the sequential voltage states of the signal, logic for comparing the current voltage state of the signal with a replica of the preceding voltage state of the signal, and first and second transistors of complementary conductivity types, for driving the bus trace to first or second reference voltages, respectively, when activated. The first transistor is turned on when the signal is in the first voltage state. The second transistor is turned on for a period determined by the clock signal driving the flip flop, the type of flip-flop, and, optionally, additional logic gates, when the signal transitions from the first voltage state to the second voltage state.

REFERENCES:
patent: 5479111 (1995-12-01), Matsuura
patent: 5604454 (1997-02-01), Maguire et al.
patent: 5617043 (1997-04-01), Han et al.
patent: 5670905 (1997-09-01), Keeth et al.
patent: 5723992 (1998-03-01), Yin et al.
patent: 5751160 (1998-05-01), Baek et al.
patent: 5760634 (1998-06-01), Fu
patent: 5793226 (1998-08-01), Park et al.

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