Source independent power supply

Claim 2

A power supply for producing at least one regulated output voltage irrespective of the form and level of the source voltage energizing said power supply comprising: input means receiving said source voltage and producing a line voltage; reference signal generator means for producing a reference signal in response to said line voltage; variable off-time oscillator means receiving said reference signal, said oscillator including means for varying said off time; variable duty cycle control signal generator means receiving said line voltage and responsive to said oscillator to generate a control signal, the off-on condition of said oscillator controlling the duty cycle of said control signal generator; means for receiving said control signal and producing a feedback signal; said means for varying receiving said feedback signal and said reference signal to thereby control the on-off condition of said oscillator and thereby control said control signal generator to maintain said control signal constant; and output means responsive to said control signal for producing said at least one output voltage.

Claim 3

The system of claim 1 wherein said variable duty cycle generator is conductive when said oscillator is on and nonconductive when said oscillator is off.

Claim 4

The system of claim 2 wherein said variable duty cycle generator includes electron control means responsive to said line voltage; voltage storage means for rendering said electron control means conductive and nonconductive in response to the on-off condition of said oscillator.

Claim 5

The system of claim 3 wherein said voltage storage means is an inductor; and wherein said on-off circuit means includes a coil, said inductor and said coil being inductively coupled.

Claim 6

The system of claim 4 wherein said electron control means is a transistor having the collector-emitter junction in series with said line voltage, a diode and a winding; and said inductor is connected from the base of said transistor to the junction of said diode and said winding.

Claim 7

The system of claim 2 wherein said output means includes an inductive driving circuit for driving an output transformer in response to said control signal; and alternating signal producing means for actuating said driving circuit to produce an alternating output.

Claim 8

The system of claim 6 wherein said alternating signal producing means is an inductive multivibrator inductively coupled to said inductive driving circuit.

Claim 9

A power supply for producing at least one regulated output voltage irrespective of the form and level of the source voltage energizing said power supply comprising: input means receiving said source voltage and producing a line voltage; reference signal generator mEans for producing a reference signal in response to said line voltage; on-off circuit means receiving said reference signal, said on-off circuit means having a constant on time and a variable off time and including means for varying said off time, said on-off circuit means also including a square loop core transformer and a first coil having N1 turns, a second coil having N4 turns, and said first coil is energized when said on-off circuit is on; and said control signal generator means includes a third coil inductively coupled to said first coil and having N2 turns; control signal generator means receiving said line voltage and responsive to said on-off circuit to generate a control signal; means for receiving said control signal and producing a feedback signal; said means for varying receiving said feedback signal and said reference signal to thereby control the on-off condition of said on-off circuit and thereby control said control signal generator to maintain said control signal constant; and output means responsive to said control signal for producing said at least one output voltage.

Claim 10

A power supply for producing at least one regulated output voltage irrespective of the form and level of the source voltage energizing said power supply comprising: input means receiving said source voltage and producing a line voltage; reference signal generator mEans for producing a reference signal in response to said line voltage; on-off circuit means receiving said reference signal, said on-off circuit means having a constant on time and a variable off time and including means for varying said off time, said on-off circuit means also including a square loop core transformer and a first coil having N1 turns, a second coil having N4 turns, and said first coil is energized when said on-off circuit is on; and said control signal generator means includes a third coil inductively coupled to said first coil and having N2 turns; control signal generator means receiving said line voltage and responsive to said on-off circuit to generate a control signal; means for receiving said control signal and producing a feedback signal; said means for varying receiving said feedback signal and said reference signal to thereby control the on-off condition of said on-off circuit and thereby control said control signal generator to maintain said control signal constant; and output means responsive to said control signal for producing said at least one output voltage.

Claim 11

The system of claim 8 wherein said on time (t1) is constant and is defined as: t1 10 8 (N2) phi /2 and said off time (t2) is variable and is defined as: t2 10 8 (N4) phi /V2 where: phi a constant for said square loop core V2 the voltage on said second coil.