Alternative Astable Multivibrator with 50% Duty Cycle:

In yet another scheme, the diode is ignored altogether and still one may obtained 50% duty cycle.

Figure: Alternative Astable Multivibrator with 50% Duty Cycle

As with the earlier circuit, while V₀₃ is high, pin 7 is open and the charging of the capacitor takes place through R_AC therefore, T_H remains T_H  = R_A C ln 2.

For the duration for which V₀₃ being Low and pin 7 acting as a short, the time T_L may be calculated as follows. The discharge equivalent circuit may be made as follows :

 Figure: Equivalent Circuit for the Case when Pin 7 Acts as a Short

Before the situation represent in the equivalent circuit arises, the following apply :

at t = 0,  V _c  (0) = (2/3) V _cc