Explanation: In VCO, the output of Schmitt trigger is fed to the input of inverter. Therefore, the output at pin3 would be an inverted output. As the input is a square wave, the output obtained will be an inverted square wave. 3. Write the equation for time period of VCO?
A. (2×Vcc×CT)/i
B. (Vcc CT)/(2×i)
C. (Vcc×CT×i)/2
D. (2×Vcc)/(i×CT)
Answer:A
Explanation: In VCO, the output of Schmitt trigger is fed to the input of inverter. Therefore, the output at pin3 would be an inverted output. As the input is a square wave, the output obtained will be an inverted square wave. 3. Write the equation for time period of VCO?
A. (2×Vcc×CT)/i B. (Vcc CT)/(2×i) C. (Vcc×CT×i)/2 D. (2×Vcc)/(i×CT)
Explanation: The time period of VCO is given as T=2×△t =(2×0.25×Vcc ×CT)/i =(0.5 V×cc×CT)/i = (Vcc×CT)/(2×i). 4. Determine the value of current flow in VCO, when the NE566 VCO external timing resistor RT =250Ω and the modulating input voltage Vc=3.25V.(Assume Vcc=+5v).