| 摘要 |
PURPOSE:To effectively simulate the generation of a read data by extracting a selected data depending on the content of a data on/off table and using the extracted signal so as to trigger a monostable multivibrator thereby generating a pulse with a prescribed width. CONSTITUTION:The clock output of an oscillator 1 is frequency-divided by a frequency division circuit 2, monostable multivibrators 6-8 are started by the output leading of the circuit 2, the output is fed to a data selector 12, and monostable multivibrators 9-11 give the inverted output of the circuit 2 to a data selector 13. A data on/off table output from the memory 22, a peak shift table output from a memory 23 and a proceed delay table output from a memory 24 are fed to the shift registers 16-18 by using the output of the circuit 2 while they are parallel-converted and the result is latched (28-30). The output is fed to a monostable multivibrator output selected by the selectors 12, 13 and triggers the output monostable multivibrator 15 via a gate circuit 14. Thus, a pulse with a prescribed width is generated by using a signal extracted depending on the content of the data on/off table.
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