摘要:
A system for logic block timing analysis may include a controller, and storage in communication with the controller. The storage may provide delay-versus-conesize values of a logic block. The system may further include a fitting module to provide a delay-cone based upon the delay-versus-conesize values of the logic block. The system may also include a conesize parser that uses the delay-cone to provide delay values through the logic block. The conesize parser may be used to validate the design of the logic block by comparing the delay-cone with a desired cycle time.
摘要:
A circuit for testing a differential current switching logic circuit of the type including: a bias potential, two resistors connected to the bias potential, and apparatus responsive to an input signal for sinking a first current through a selected one of the resistors so as to generate first and second differential output signals at the resistors. The circuit includes first, second, and third transistors, each having first and second terminals for conducting a current responsive to a signal applied to a control terminal. Apparatus are provided for supplying a current. The first transistor has its first terminal connected to the current supplying means, and its second terminal connected to a circuit node. The second transistor has its first terminal connected to the circuit node, its second terminal connected to the bias potential, and its control terminal connected to sense the potential at a selected one of the resistors. The third transistor has its first terminal connected to the circuit node, its second terminal connected to the selected resistor, and its control terminal connected to sense the potential at the other of the resistors. The circuit functions to sense the potential difference between the first and second differential output signals. When the potential difference is less than a predetermined level, a second current is sunk through the one resistor so as to lower the potential of the output signal associated with the one resistor relative to the potential of the output signal associated with the other resistor.
摘要:
A system to identify timing differences due to logic block changes, the system may include a controller, and storage in communication with the controller. The controller may provide delay values of a previous logic block and a current logic block. The system may also include a timing-modeler to compare the delay values of the previous logic block with the current logic block for timing analysis. The system may further include an interface that provides a report based upon the previous logic block and the current logic block comparison.
摘要:
A system for logic block timing analysis may include a controller, and storage in communication with the controller. The storage may provide delay-versus-conesize values of a logic block. The system may further include a fitting module to provide a delay-cone based upon the delay-versus-conesize values of the logic block. The system may also include a conesize parser that uses the delay-cone to provide delay values through the logic block. The conesize parser may be used to validate the design of the logic block by comparing the delay-cone with a desired cycle time.