| 摘要 |
PURPOSE:To obtain an inexpensive digital filter which is capable of a multi-spot input, by making use of a large-capacity shift register. CONSTITUTION:A digital filter is formed with the following devices: a large-capacity and multi-bit dynamic shift register 1 that stores all interruption information given from the circuit 11; a multiplexer 2 which gives a time division to the interruption input; an AND gate 3; an OR gates 4; a 4-bit shift register 5; an FF6 which store the most significant bit of register 5; an exclusive OR gate 7; a 4-notation counter 8; a counter 9; a clock generator 10; an AND gate 15; an inverter 16; AND gates 17 and 18; an OR gate 19; and an FF20 that stores temporarily the state of the selected circuit. In such consistion, an inexpensive digital filter capable of a multi- spot input is obtained. |
