| 摘要 |
PURPOSE:To achieve an automatic flashing at a level near 0dB such as (0dB+ or - 0.1dB) pertaining to a level indicator designed to indicate several levels with individual display segments arranged in a row. CONSTITUTION:Outputs of output terminals t1-t15 of a decoder 12 are fed separately to each one of NOR gates 131-1315. Outputs of an upper level of NOR gates 132-1315 and an output of an upper level of an output terminal t16 are applied to other input terminals thereof 131-1315 while sixteen LEDs D1-D16 are inserted between the NOR gates 131-1315 and the output terminal t16 and a power source terminal 14. Such an arrangement of feeding output signals of an upper level to the NOR gates enables a bar graph indication. A level comparator 9 compares current data with the data preceding by 1 clock stored in an FF10 and when the current data is larger, it is selected with a multiplexer 8. This enables invariable outputting of the max. level. |
