Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO2016105994 - TOPOLOGIE D'AMPLIFICATEUR RF DE FORTE PUISSANCE ALIMENTÉ PAR BATTERIE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

What is claimed is:

1. A current amplifier, comprising a transformer, the transformer comprising one or more taps on the primary coil, wherein each tap comprises a half bridge driver, wherein the half bridge drivers configured to selectively turn on or turn off the tap.

2. The current amplifier of claim 1, wherein the half bridge driver comprises an upper switch element and a lower switch element, a high-side drive input connected to the input of the upper switch element, a low-side drive input connected to the input of the lower switch element, wherein the upper and lower switch elements are connected in a cascade arrangement and the output of the half bridge driver is taken from the node between the upper and lower switch elements.

3. The current amplifier of claim 2, wherein the upper and lower switch elements comprise solid-state switching elements.

4. The current amplifier of claim 3, wherein the solid-state switching elements comprise MOSFETs.

5. The current amplifier of claim 2, wherein the upper and lower switch elements comprise IGBTs.

6. The current amplifier of claim 2, wherein the upper and lower switch elements comprise mechanical relays.

7. The current amplifier of claim 1, comprising a parallel capacitor on the secondary coil, such that the output produced by the amplifier is a sine wave.

8. The current amplifier of claim 1, wherein the minimum winding ratio is 4:1.

9. The current amplifier of claim 1, wherein the maximum winding ratio is 15:1.

10. An electrosurgical medical instrument comprising:

a radio frequency (RF) generation circuit coupled to and operated by a battery and operable to generate an RF drive signal and to provide the RF drive signal to at least one electrical contact, wherein the RF generation circuit comprises:

A current amplifier, comprising a transformer, the transformer comprising one or more taps on the primary coil, wherein each tap comprises a half bridge driver.

11. The medical instrument of claim 10, wherein the half bridge driver comprises an upper switch element and a lower switch element, a high-side drive input connected to the input of the upper switch element, a low-side drive input connected to the input of the lower switch element, wherein the upper and lower switch elements are connected in a cascade arrangement and the output of the half bridge driver is taken from the node between the upper and lower switch elements.

12. The medical instrument of claim 11, wherein the upper and lower switch elements comprise solid-state switching elements.

13. The medical instrument of claim 12, wherein the solid-state switching elements comprise MOSFETs.

14. The medical instrument of claim 11, wherein the upper and lower switch elements comprise IGBTs.

15. The medical instrument of claim 11, wherein the upper and lower switch elements comprise mechanical relays.

16. The medical instrument of claim 10, comprising a parallel capacitor on the secondary coil, such that the output produced by the amplifier is a sine wave.

17. The medical instrument of claim 10, wherein the minimum winding ratio is 4:1.

18. The medical instrument of claim 10, wherein the maximum winding ratio is 15:1.

19. A current amplifier, comprising:

a transformer comprising one or more taps on the primary coil, wherein each tap comprises a half bridge driver configured to selectively turn on or turn off the tap, wherein the half bridge driver comprises an upper switch element and a lower switch element, a high-side drive input connected to the input of the upper switch element, a low-side drive input connected to the input of the lower switch element, wherein the upper and lower switch elements are connected in a cascade arrangement and the output of the half bridge driver is taken from the node between the upper and lower switch elements; and

a parallel capacitor on the secondary coil, such that the output produced by the amplifier is a sine wave;

wherein the minimum winding ratio is 4:1; and

wherein the maximum winding ratio is 15:1.

20. The current amplifier of claim 19, wherein the upper and lower switch elements comprise solid-state switching elements.