Duty cycle adjustable frequency multiplier

Shown is a duty cycle adjustable multiplier. It is composed of low-power monostable and astable multivibrator CD 4047, diodes, resistor-
capacitor components, etc. Rr, cl, R2, and C2 respectively form an integrating loop, which is used to detect the leading and trailing edges of the input pulse signal . That is to
say, the front and rear edge instantaneous spike signals output by the two integrating loops trigger the negative trigger terminal - IR and the positive trigger terminal +TR of CD4047 respectively. Therefore, CD4047 outputs a pulse signal
from the Q terminal with a frequency twice that of the input signal . Potentiometer W (100 kfl) can be used to change the duty cycle of the output pulse signal sequence. Figure 19-18 shows the pin arrangement of chip CD 4047.