US 5,394,048 A · High-voltage generator

Abstract

A high-voltage generator employing a piezoelectric transformer has an inverter having input and output terminals connected to input terminals of the piezoelectric transformer, respectively; a feedback resistor connected to the input terminals of the piezoelectric transformer in parallel with the inverter; and first and second capacitors. The first capacitor is connected between the input terminal of the inverter and a ground. The second capacitor is connected between the output terminal of the inverter and the ground. The inverter, feedback resistor, and capacitors form a self-exciting oscillator to drive the piezoelectric transformer so that the piezoelectric transformer produces a high-voltage output. Since the inverter, feedback resistor, and capacitors are small, thin and light, the high-voltage generator as a whole is also small, thin and light.

Claims5

Dependent claims

A high-voltage generator employing a piezoelectric transformer, comprising:

a CMOS-IC inverter having input and output terminals connected to input terminals of the piezoelectric transformer, respectively;
a feedback resistor connected to the input terminals of the piezoelectric transformer in parallel with said CMOS-IC inverter;
first and second capacitors, said first capacitor being connected between the input terminal of said inverter and a ground, said second capacitor being connected between the output terminal of said inverter and the ground;
and
a power source connected to said CMOS-IC inverter, so that said CMOS-IC inverter, feedback resistor, and first and second capacitors form a self oscillation circuit.

2 more elements

Dependencies are inferred from the claim text.

High-voltage generator

Life of this patent

High-voltage generator

Life of this patent

Abstract

Claims5