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High Voltage Circuits Using Chargistors

IP.com Disclosure Number: IPCOM000097426D
Original Publication Date: 1962-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Schomburg, JF: AUTHOR [+2]

Abstract

A chargistor is employed in an oscillator circuit to provide high voltage A.C. or D.C. output signals from low voltage power sources. No isolating transformers are required.

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High Voltage Circuits Using Chargistors

A chargistor is employed in an oscillator circuit to provide high voltage A.C. or D.C. output signals from low voltage power sources. No isolating transformers are required.

Chargistor 1 has two gates 2 and 3. Bias voltages V(g2) and V(g3) are applied to place it in a negative resistance region of instability. Inductance 4 is connected as a load across output terminals 5 and 6. Chargistor power supply V(c) connects one end of inductance 4. In operation, the current oscillation of chargistor 1 causes a voltage drop across inductance 4 of L (dI/dt). L is the value of inductance 4, I is the current being switched by chargistor 1 and t is the switching time. Chargistors have inherently high voltage handling capabilities. Therefore, the output voltage pulse produced across terminals 5 and 6 is relatively high. For example, with a V(g2) of +4.2 volts, a V(g3) of +0.75 volts, a V(c) of + 30 volts and an L of 700 millihenries, the output pulse obtained across terminals 5 and 6 is 300 volts, a voltage transformation ratio of ten.

The circuit can be used as a D.C. transformer. When a diode, capacitor rectifying network 8 is connected to terminal 5, a D.C. output voltage of 300 volts is obtained.

When a D.C. or A.C. gate signal is applied to terminal 7, the circuit oscillation is gated. When this occurs, the circuit can be employed as a neon- light indicator driver by connecting the resistor and neon light circuit 9 across terminals 5...