Patent ID: 7265527

Claim:
A current generating circuit comprising: a first current source generating a substantially constant input current I IN ; and a direct current multiplier (DCM) having input terminals connected to receive the constant input current I IN , the DCM comprising: a capacitor coupled across the DCM input terminals; a switching circuit comprising a first transistor and a second transistor that are connected to have opposite states; a first inductor coupled between the first transistor and a first terminal of a load, the first inductor conducting a ramping current to the load through the first transistor up until a peak current when the first transistor is turned on, the first transistor and the second transistor being connected such that the first transistor turns off when the first inductor conducts the peak current; a second inductor coupled between the second transistor and the first terminal of the load, the second inductor conducting a ramping current to the load through the second transistor up until a peak current when the second transistor is turned on, the first transistor and the second transistor being connected such that the second transistor turns off when the second inductor conducts the peak current; a first rectifying element coupled to the first inductor, the first rectifying element conducting a discharge current through the first inductor and the load when the first transistor is turned off; and a second rectifying element coupled to the second inductor, the second rectifying element conducting a discharge current through the second inductor and the load when the second transistor is turned off; the capacitor, first transistor, second transistor, first inductor, second inductor, first rectifying element, and second rectifying element forming a self-resonating circuit when the load is connected to the first inductor and second inductor, wherein the direct current multiplier generates a current through the load that is substantially double the input current I IN supplied by the current source.