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A current-mode general nth-order filter configuration using current mirrors is proposed in the paper. The filter uses n basic current mirrors and n unloss integrators, and can realize low pass, high pass, band pass, band reject and all pass filtering responses by changing input signal forms. As a design example, a fourth-order filter related CMOS circuit is… (More)
In this paper, the characteristics of the basic current mirror and the continuous-time current-mode current mirror integrator are analyzed. Using the two unlossy loop integrators and the basic current mirrors, the biquad circuit block is implemented. The signal flow graph (SFG) and the improved leap-frog (ILF) structure are simple to implement the six-order… (More)
—The graph n C 4 is a 4n-cycle with 4n vertexes and the graph m P is a path with m+1 vertexes. Furthermore, The graph m n n P C C * * 4 4 denotes the disjoint union of two copies n C 4 and m P. In this paper, the graph m n n P C C * * 4 4 is proved to be graceful for all n and 1 = m or 2 + ≥ n m .
In this paper, we study the coordination of the two-stage supply chain which composed of one manufacturer and one retailer. Based on the hypothesis that demand will increase with the increase of emission reduction rate, we develop a model in which the manufacturer takes charge of the reduction of carbon emissions, and the retailer drives revenue-sharing… (More)
The huge popularity of online social networks and the potential financial gain have led to the creation and proliferation of zombie accounts, i.e., fake user accounts. For considerable amount of payment, zombie accounts can be directed by their managers to provide pre-arranged biased reactions to different social events or the quality of a commercial… (More)