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In this paper, an efficient framework is proposed to analyze the worst case of voltage variation of power network considering multidomain clock gating. First, a frequency-domain-based simulation method is proposed to obtain the time-domain voltage response. With the vector fitting technique, the frequency-domain responses are approximated by a partial fraction expression, which can be easily converted...
This paper proposes an efficient method to find the worst case of voltage violation by multi-domain clock gating in an on-chip power network. We first present a voltage response in an arbitrary multi-domain clock gating pattern, using a superposition technique. Then, an integer linear programming (ILP) formulation is proposed to identify the worst-case gating pattern and the maximum variation area...
This paper proposes an efficient analysis flow and an algorithm to identify the worst case noise for power networks with multiple clock domains. First, we apply the Laplace transform on the input current sources to derive the analytical formula. Then, we calculate the circuit frequency response with logarithmic scale frequency components. The frequency domain response is approximated by a rational...
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