| 摘要 |
PURPOSE:To constitute various types of digital circuits by using a single unit chip containing a multiplication part and addition part singly or in plural combination. CONSTITUTION:An n-bit multiplier signal B and an n-bit multiplicand signal A are applied to a multiplication part 17, a delay circuit 12 and a selector via variable delay circuits 10 and 11 respectively. The selector 18 selects either one of outputs of the part 17 and circuits 12, 10 and 11 and applies it to an addition part 22. While a signal C to be added of (2n-1+alpha) bits selects either one of a delay circuit 20 which works to have an amount of delay equal to about an upper bit and a delay circuit 19 which delays equally the signal of each bit through a selector 21 and applies it to the part 22. The output of addition is delivered after selecting either one of a delay circuit 23 which delays equally the signal of each bit and a delay circuit 24 which works to obtain an amount of delay equal to a lower bit or so through a selector 25. |
