Saturday, March 9, 2013

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Discussing Clock Signals for Inverter Circuit

Please read the previous post for continuation...

Hi Swagatam,  the 4069 square wave circuit I was using originally has 2 Clock signals . The first signal comes out of Pin# 2 of the 4069 goes to 10K resistor then to base of TR1. Part of that signal is diverted back into Pin# 3 and inverted  out through Pin# 4 and out the other resistor and to base of TR2. Please correct me if Im wrong.
  I only used the clock signal coming out of Pin# 2 to TR1. I did not use the inverted half coming out of Pin# 4 to TR2.
I connected Pin# 3 to ground and Pin# 4 N/C, and I did not use TR2.
 Is this OK??????
Sincerely Ali
Hi Aliman,
 The two gates are required to create a push-pull effect and make both the windings saturate alternately. Only due to this function we are able to get complete AC cycles at the output, so, its better that we follow the original design only.

Best Regards.
Sorry for the confusion on my part.
 So let me get this right, I should use the complete 4069 circuit  as per the Schematic I sent you. Ok ,so where the Clock signal comes out of TR1s collector and TR2s collector,  do I connect those two points to the Clock Input connection on your circuit ?
Thanks for your patience Swagatam
Sincerely Ali
Hi Swagatam,  so I should combine the outputs of TR1 & TR2 and connect them to the Clock Input connection on your circuit ?? Is that correct??
P.S. I told you  I was a beginner,lol...
Sincerely Ali
Hi Swagatam, my confusion lies in the final connection between the 4069 circuit and your PWM circuit. Here is a diagram of both circuits, how do I connect the two outputs from TR1 & TR2 to the Clock Input in your circuit ?
Sincerely Ali
 Hi Ali,
Please do the connections as per the following steps:

We dont need the gate of IC 4069 with the pin 3 and 4, so take it out of the scene, but remember to connect pin 3 to ground, just as pin 5 and pin 9.

The clock output from pin 2 of IC 4069 now gets disconnected from the transistor bases and goes to the clock input of our 4017 ICs.

Finally the diode outputs from the two ICs 4017 now gets connected to the two transistor bases respectively.

Thats it.... your modified PWM circuit is ready.

Thanks and Regards.

Continued HERE,

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