| 摘要 |
PURPOSE:To simply obtain a stable digital broken line function device, by adding a counter, a multiplexer, etc. to an oscillator. CONSTITUTION:The pulse signal sources of plural frequencies obtained by dividing a high frequency of an oscillator are switched successively and supplied to an up-down counter. Then a functional digital output is obtained in the form of an integrated count output. A switch time pulse 4 is extracted out of the divided pulses and supplied to a counter 5 for the selector signal of a multiplexer. Then a terminal suited to the inclination of each broken line of a broken line function is selected out of the divided pulse output terminals 3 to be connected to an input terminal 7 of a divided pulse selecting multiplexer 6. An up-signal 10 and a down-signal 11 are selected and connected to an input terminal 9 of an up-down signal switching multiplexer 8. The broken line function is produced and reset by a control circuit 17 which controls the start/stop of an oscillator 1 as well as the resetting of counters 2, 5 and 12. Then the digital signals are obtained from an output 15 of an up-down counter 12. |
