TWO TERMINALS QUASI RESONANT TANK CIRCUIT
3 Assignments
0 Petitions
Accused Products
Abstract
A power converter includes a transformer, a primary switch, an auxiliary switch, first and second resonance capacitors, and a secondary side rectification means. A switch mode power supply is formed to use reflected voltage and parasitic capacitance as an energy source for a transformer resonance. The auxiliary switch effectively exchanges energy between the primary inductance of the transformer and the first and second resonant capacitors. The auxiliary switch effectively switches the transformer resonance between two distinct frequencies. In one embodiment of the invention, the power converter can be, but is not limited to, a flyback converter and further includes a comparator and a driver. The comparator is for detecting the voltage across the second resonance capacitor and the driver is configured to drive the auxiliary switch based on the output state of the comparator. The resonant nature of the converter provides zero voltage (ZVS) for the primary switch as well as for the auxiliary switch.
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Citations
62 Claims
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1-50. -50. (canceled)
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51. A quasi resonant type circuit comprising:
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an inductor; a capacitor coupled to the inductor in a parallel inductor-capacitor (LC) type arrangement; a transistor coupled to the inductor-capacitor type arrangement, the transistor for providing a switching cycle; wherein the circuit implements a quasi resonant storage tank for storing an electromagnetic energy by using a resonant current; wherein the circuit is configured to receive the resonant current in a first cycle of operation, wherein the circuit is configured to release the stored energy in a second cycle of operation. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60, 61)
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62-69. -69. (canceled)
Specification