Ultra-low voltage boost circuit
A circuit for boosting the voltage from a very low level voltage source to a higher level voltage output utilizing self-oscillation.
1. An apparatus for converting a low magnitude voltage from a voltage source to a higher magnitude voltage comprising:
a) a transformer having a high voltage secondary side with a high number of turns, a first low voltage primary side with a low number of turns wound in one direction and .a second low voltage primary side with a low number of turns wound in the opposite direction;
b) one or more N-channel transistors that are in electrical series with said voltage source and said first low voltage primary side of said transformer that controls electrical current flow through said first low voltage primary side of said transformer;
c) one or more P-channel transistors that are in electrical series with said voltage source and said first low voltage primary side of said transformer that controls electrical current flow through said second low voltage primary side of said transformer;
d) control lines for said one or more N-channel transistors and said one or more P-channel transistors that are connected through resistors to said high voltage secondary side of said transformer; and
e) a rectifying circuit that takes a cyclically varying voltage from said high voltage secondary side of said transformer and converts it to a DC voltage;
whereby the use of two primary side windings allows power to be drawn from said voltage source during positive and negative half cycles of oscillation.
2. The apparatus of claim 1 wherein alternating current flow through said one or more N-channel transistors is initiated by a voltage signal at the gate of said one or more N-channel transistors that arises from noise and electromagnetic excitation in said high voltage secondary side of said transformer, causing self-oscillation.
3. The apparatus of claim 1 wherein alternating current flow through said one or more P-channel transistors is initiated by a voltage signal at the gate of said one or more P-channel transistors that arises from noise and electromagnetic excitation in said high voltage secondary side of said transformer, causing self-oscillation.
4. The apparatus of claim 1 wherein said rectifying circuit also acts as a voltage multiplying circuit.
5. The apparatus of claim 1 wherein said voltage source is a thermoelectric generator.
6. The apparatus of claim 1 wherein said voltage source may have either polarity.
7. The apparatus of claim 1 wherein said voltage source can be a varying voltage.