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US 3,947,745 AGranted
Variable voltage inverter
AssigneeAgricultural Enterprises, Inc.
InventorJames E. Redmon
Life of this patent
Estimating the term…
Abstract
A relaxation oscillator having a programmable unijunction transistor for producing an A.C. voltage. A variable portion of the A.C. voltage is selected and operates connected transistor amplifiers, which in turn cause an amplified A.C. voltage to be induced in a transformer. A voltage multiplier further increases the voltage and produces an output D.C. signal.
Claims5
A variable voltage inverter comprising:
- a source of D.C. voltage;
- a relaxation oscillator means connected to said source for receiving and converting the D.C. voltage signal to a first A.C. voltage signal, said relaxation oscillator means including a programmable unijunction transistor;
- a first transistor amplifying means for receiving said first A.C. voltage signal and providing a second A.C. voltage signal, said first amplifying means having a resistor and a first capacitor forming an RC-coupling to said oscillator means, said first amplifying means including a potentiometer means for selecting and transmitting a variable portion of said second A.C. voltage signal, said first amplifying means having a second capacitor connected to said potentiometer means;
- a second transistor amplifying means connected by said second capacitor to said first amplifying means and actuated by said variable portion of said second A.C. voltage signal whereby said second amplifying means is switched alternately between conducting and non-conducting states;
- a transformer means connected to said second amplifying means;
- and
- a voltage multiplier means for producing a stepped-up D.C. voltage signal from an input A.C. signal, said multiplier means being coupled to said transformer means, whereby a variable D.C. voltage output is obtained.
4 more elements
Dependencies are inferred from the claim text.