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Innovating For Tomorrow
Cooke Inc.
Audio Amp
Boosting Circuit
The Boosting Circuit is made up of two major parts. The audio amplifier and the step up transformer.
The audio amplifier is needed because the function generator chip can't produce enough current to induce an electrical field in the core of the transformer. The signal comes into the audio amplifier from the function generator chip through a series of relays which switch wave-forms. The audio transformer filters out the DC voltage offset and increases the output voltage and current of the input this allows the core of the step-up transformer to generate an electrical field.
The boosting circuit is needed because the output of the function generator chip isn't a high enough voltage to conduct an electrical impulse through the skin and fat to where the nerves, muscles and connective tissue reside.
Audio Amplifier
The step-up transformer is needed to increase the voltage so that the waveform can penetrate to the nerves,muscle, and connective tissue. This works by applying a to coil which induces a voltage on a secondary coil by using electrical fields. A transformer with a turns ratio of 1:11 was used in order to achieve the correct output voltage.
The yellow signal is the output of the function generator chip and the purple is the output of the audio amplifier. The audio output is 3.5V peak with no DC offset and the function generator chip is 100mV peak.
Step-up Transformer
The purple signal is the output of the audio amplifier and the blue is the output of the step-up transformer. The audio output is 3.5V peak and the transformer output is 100V peak
Transformer used in the boosting circuit.
Audio Amplifier circuit used.
Transformer
The the yellow is the output of the function generator chip and the blue is the output of the step-up transformer. The yellow is 100mV peak and the blue is 100V peak. This is the before and after wave-forms of the boosting process.
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