Regulated converter circuit with pulse width modulation circuit using passive components

Claim 2

A DC to DC converter comprising a power stage including first and second switching devices, an output transformer and a feedback circuit responsive to said output transformer and connected to drive said switching devices, said feedback circuit including a tertiary winding on said output transformer and having first and second terminals; first, second, third and fourth charging capacitors; said first capacitor coupled to said first terminal and being connected to drive said first switching devIce; said second capacitor coupled to said second terminal and being connected to drive said second switching device; said third capacitor coupled to said second terminal and being coupled to said first capacitor to counter the charging thereof; and said fourth capacitor coupled to said first terminal and being coupled to said second capacitor to counter the charging thereof.

Claim 3

A DC to DC converter, as defined in claim 1, whereby said first and third capacitors are connected by a first charge transfer path and said second and fourth capacitors are connected by a second charge transfer path.

Claim 4

A DC to DC converter, as defined in claim 1, further including means to monitor the output voltage and compare it with a reference voltage; means to derive an error signal from the comparison signal; and means to apply said error signal to alter the residual charge of said first, second, third and fourth capacitors to restore the output voltage to its regulated value.

Claim 5

A DC to DC converter as defined in claim 1 further including first and second impedance paths to cross couple the input and output terminals of said first and second switching devices.

Claim 6

A DC to DC converter including at least one switching device, a power transformer and comprising means to regulate the voltage output thereof including a voltage regulation feedback circuit to sustain oscillations in said converter and drive said switching means; said feedback circuit comprising a voltage sensing tertiary winding in said power transformer; dual charging means coupled to drive said switching device comprising a first charging network including a first capacitive device connected to one terminal of said tertiary winding; and a second charging network including a second capacitive device connected to a terminal opposite said one terminal of said tertiary winding, wherein said first and second capacitive devices are charged to opposite voltage polarities, said first and second capacitive devices being coupled to discharge into each other and being coupled to drive said switching device.

Claim 7

A DC to DC converter including at least one switching device, a power transformer and comprising means to regulate the voltage output thereof including a voltage regulation feedback circuit to sustain oscillations in said converter and drive said switching means; said feedback circuit comprising a voltage sensing tertiary winding in said power transformer; dual charging means coupled to drive said switching device comprising a first charging network including a first capacitive device connected to one terminal of said tertiary winding; and a second charging network including a second capacitive device connected to a terminal opposite said one terminal of said tertiary winding, wherein said first and second capacitive devices are charged to opposite voltage polarities, said first and second capacitive devices being coupled to discharge into each other and being coupled to drive said switching device.

Claim 8

A DC to DC converter, as defined in claim 5, further including a second switching device; a second dual charging means coupled to drive said second switching device and comprising a third capacitive device connectd to said opposite terminal of said tertiary winding; and a fourth capacitive device connected to the said one terminal of said tertiary winding wherein said third and fourth capacitive devices being coupled to discharge into each other and being coupled to drive said second switching device.

Claim 9

A DC to DC converter, as defined in claim 6, further including means to regulate the output voltage of said converter including a reference voltage source; means to compare the output voltage with said reference voltage and generate an error signal therefrom; and means to couple said error signal to said first and third capacitive devices to deposit charge therein to alter the bias signal level in order to regulate the output voltage.