Modify the circuit of Figure 9-73 to generate a CONTROL waveform that goes LOW from t₂₀ to t₂₄.

Figure 9-73

Transcribed Image Text:

TC MOD-8 counter CLK EN CLR Q₂ Q₁ Qo A₂ A₁ Ap 74LS138 E₂ E₂ E₁ TC 07 06 05 04 03 0₂ 0₁ 00 MOD-8 counter CLK EN CLR Q₂ Q₁ Qo 1 CLOCK RESET CONTROL CLOCK RESET