Positive feedback resonant transducer circuit
First Claim
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1. A positive feedback amplifier circuit comprising:
- a transformer having an input side and an output side;
a rectifier array having an input side and an output side, said input side of said rectifier array being electrically connected to said output side of said transformer;
a low voltage power source having an input side and an output side;
a storage capacitor in series with said output side of said low voltage power source and said input side of said transformer;
wherein an output of the rectifier array is applied and added to an output of said low voltage power source to provide a supplemented voltage to said storage capacitor;
and further comprising a comparator subcircuit having an input side and an output side;
an output signal at said output side of said comparator subcircuit being a voltage pulse;
an SCR trigger subcircuit comprising a capacitor in series between a resistor and a transistor;
said transistor having a base a collector and an emitter;
said capacitor being connected to the base of said transistor; and
said comparator subcircuit being connected in series between said low voltage power source and said SCR trigger subcircuit;
an SCR having a gate, and an anode and a cathode;
said gate being connected to said collector of said transistor;
said anode being connected to said storage capacitor;
said cathode being connected to ground.
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Abstract
A circuit including a transformer, preferably a laminated piezoelectric transducer, in combination with a positive feedback amplifier circuit, capable of serving: 1) to produce either an audible or ultrasonic signal; or 2) as an energy source capable of driving an auxiliary high voltage device with an initial and continuing low voltage source such as a battery.
25 Citations
5 Claims
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1. A positive feedback amplifier circuit comprising:
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a transformer having an input side and an output side;
a rectifier array having an input side and an output side, said input side of said rectifier array being electrically connected to said output side of said transformer;
a low voltage power source having an input side and an output side;
a storage capacitor in series with said output side of said low voltage power source and said input side of said transformer;
wherein an output of the rectifier array is applied and added to an output of said low voltage power source to provide a supplemented voltage to said storage capacitor;
and further comprising a comparator subcircuit having an input side and an output side;
an output signal at said output side of said comparator subcircuit being a voltage pulse;
an SCR trigger subcircuit comprising a capacitor in series between a resistor and a transistor;
said transistor having a base a collector and an emitter;
said capacitor being connected to the base of said transistor; and
said comparator subcircuit being connected in series between said low voltage power source and said SCR trigger subcircuit;
an SCR having a gate, and an anode and a cathode;
said gate being connected to said collector of said transistor;
said anode being connected to said storage capacitor;
said cathode being connected to ground. - View Dependent Claims (2, 3, 4, 5)
and wherein the first polarized ceramic wafer is bonded to the second polarized ceramic wafer such that a major face of the first polarized ceramic layer and a major face of the second polarized ceramic layer are in opposed spatial relation to each other;
and wherein the direction of polarization of said first polarized ceramic layer and the direction of polarization of said second polarized ceramic layer are the same.
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4. The electrical circuit of claim 3 wherein said transformer is a thickness mode piezoelectric transformer.
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5. The electrical circuit of claim 3 wherein said transformer is a thickness mode piezoelectric transformer with masses bonded on opposing faces.
Specification