Patent ID: 9094002
Filing Date: 2015-07-28
Classification: H03K

Abstract:
1. An in situ pulse-based delay variation monitor that predicts timing errors caused by process and environmental variations, comprising: a sequential storage device having a master storage device receiving a clock input and a slave storage device; the master storage device having a data input and the slave storage device having a data output; a node being established on an electrical connection from the master storage device to the slave storage device; a transition detector being electrically connected to the node for receiving the data output of the master storage device to define a warning area having a predetermined time span defined by a delay buffer, said transition detector generating a pulse width output responsive to transition of the data input; and a warning signal generator being electrically connected to the transition detector; wherein the warning signal generator produces a warning signal responsive to the pulse width and the clock input when the data input is detected in the predetermined time span defined by the warning area.