Patent ID: 6329835
Filing Date: 2001-12-11
Classification: H03K

Abstract:
A reduced-noise integrated circuit comprising:a plurality of data inputs;a control input generating a control signal;a plurality of output buffers for driving output pins, each output buffer including a large driver transistor and a small driver transistor for driving an output pin to a state;a local enable signal, in each of the plurality of output buffers, for indicating when the small driver transistor is to be enabled to drive the output pin;a plurality of detector slices, each detector slice receiving a data input in the plurality of data inputs, each detector slice for generating a local pulse when a transition of the data input is detected by the detector slice and the control input is in a first state, but for not generating the local pulse in response to the transition of the data input when the control input is a second state;first combining logic, receiving local pulses from some of the plurality of detector slices, for generating a first global pulse when any of the local pulses are received by the first combining logic; andsecond combining logic, receiving local pulses from others of the plurality of detector slices, for generating a second global pulse when any of the local pulses are received by the second combining logic;wherein each of the plurality of output buffers contains:final combining logic for combining the first and second global pulses with the local enable signal to generate a local gate signal, the local gate signal being applied to a gate of the large driver transistor but not applied to a gate of the small driver transistor;wherein the large driver transistor is pulsed off by the local gate signal when one of the detector slices detects the transition of a data input and the control input is in the first state but not the second state,whereby neighbor sensing is disabled by the control input.