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								| High-Speed Noninverting Summing 
												Amplifier Operates To 220 MHz:  
												10/29/01 Electronic Design - 
												Ideas for Design / The schematic 
												in Figure 1 is a common summing 
												amplifier with multiple inputs 
												and one single-ended output. It 
												is a variation of a standard 
												inverting amplifier. Point X is 
												a virtual ground and is referred 
												to. . . |  |  |  
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