1. A semiconductor integrated circuit comprising:
a level shift stage including:
a first input terminal to receive a first signal having a first amplitude;
a second input terminal to receive a second signal in a phase reverse to the first signal and having the first amplitude;
a first output terminal to supply a third signal having a second amplitude greater than the first amplitude and being in a phase reverse to the first signal;
a second output terminal to supply a fourth signal having the second amplitude and being in a phase reverse to the second signal;
a delay stage to receive the fourth signal and a fifth signal having the second amplitude and being in a phase reverse to the third signal and to output a delay signal of the fourth and fifth signals; and
an output stage including:
a first MOSFET of a first conductivity type to receive the fourth signal;
a second MOSFET of a second conductivity type to receive the fifth signal;
a third MOSFET of the first conductivity type to receive the delay signal, a drain of the third MOSFET being coupled to a source of the first MOSFET;
a fourth MOSFET of the second conductivity type to receive the delay signal, a drain of the fourth MOSFET being coupled to a source of the second MOSFET.
2. The semiconductor integrated circuit according to claim 1, further comprising:
an output terminal being coupled to a drain of the first MOSFET and a drain of the second MOSFET.
3. The semiconductor integrated circuit according to claim 1, further comprising:
a first inverter coupled to the second terminal, to receive the first signal and to output the second signal; and
a second inverter coupled to the first output terminal and the delay stage, to receive the third signal from the first output terminal and to output the fifth signal to the delay stage.
4. The semiconductor integrated circuit according to claim 1, further comprising:
a fifth MOSFET of a first conductivity type, a source of the fifth MOSFET coupled to a source of the third MOSFET, a drain of the fifth MOSFET coupled to the drain of the third MOSFET; and
a sixth MOSFET of a second conductivity type, a source of the sixth MOSFET coupled to a source of the fourth MOSFET, a drain of the sixth MOSFET coupled to the drain of the fourth MOSFET;
wherein a gate width of the third MOSFET is wider than a gate width of the fifth MOSFET, and
wherein a gate width of the fourth MOSFET is wider than a gate width of the sixth MOSFET.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An endoscopic bipolar forceps, comprising:
a housing;
a shaft affixed to the housing and defining a central longitudinal axis, the shaft having an end effector assembly engaged at a distal end thereof, the end effector assembly including two jaw members movable from a first position in spaced relation relative to one another to at least a second position closer to one another for grasping tissue therebetween, each of the jaw members adapted to connect to an electrosurgical energy source such that the jaw members are capable of conducting energy through tissue held therebetween to affect a tissue seal;
a drive assembly disposed within the housing for moving the jaw members from the first position to the second position, the drive assembly including a first gear-like cam member and a second gear-like cam member;
a movable handle mechanically associated with the first gear-like cam member such that movement of the handle rotates the first gear-like cam member into cooperation with the second gear-like cam member to actuate the drive assembly through an actuating stroke to move at least one jaw member, wherein the first gear like cam member includes a plurality of gear teeth and the second gear-like cam member includes a plurality of gear teeth, the second gear-like cam member being shaped to vary in curvature to correspondingly vary the actuating stroke of the drive assembly, wherein the second gear-like cam member is pivotally connected to a drive sleeve, and wherein actuation of the movable handle causes translation of the drive sleeve to affect movement of at least one jaw member, and
a rod pivotally connected to the movable handle at a first location and pivotally connected to a portion of the first gear-like cam member at a second location, the rod being angularly disposed with respect to the central longitudinal axis of the shaft.
2. An endoscopic bipolar forceps according to claim 1 wherein the first gear like cam member includes a plurality of gear teeth and the second gear-like cam member includes a plurality of gear teeth, the plurality of gear teeth associated with the first gear-like cam member being different from the plurality of gear teeth of the second gear-like cam member.
3. An endoscopic bipolar forceps according to claim 1 wherein the first gear-like cam member includes a first shape and the second gear-like cam member includes a second shape, the first shape associated with the first gear-like cam member being different from the second shape of the second gear-like cam member.
4. An endoscopic bipolar forceps according to claim 1 wherein the second gear-like cam member is shaped to include a first shape which actuates the drive assembly through a first actuating stroke of a first length and a second shape which actuates the drive assembly through an actuating stoke of a second length, the first length being greater than the second length.
5. An endoscopic bipolar forceps according to claim 1 further including a trigger assembly operatively disposed relative to the movable handle which selectively advances a knife assembly which cuts tissue along the tissue seal.
6. An endoscopic bipolar forceps according to claim 1 wherein the pivotal connection between the rod and the movable handle is a direct connection.
7. An endoscopic bipolar forceps according to claim 1 wherein the pivotal connection between the rod and the first gear-like cam member is a direct connection.
8. An endoscopic bipolar forceps according to claim 1 wherein the first location is disposed on a first side of the central longitudinal axis, and wherein the second location is disposed on a second, opposite side of the central longitudinal axis.
9. An endoscopic bipolar forceps according to claim 8 wherein the second gear-like cam member is disposed distally of the second location.
10. An endoscopic bipolar forceps, comprising:
a housing;
a shaft affixed to the housing and defining a central longitudinal axis, the shaft having an end effector assembly engaged at a distal end thereof, the end effector assembly including two jaw members movable from a first position in spaced relation relative to one another to at least a second position closer to one another for grasping tissue therebetween, each of the jaw members adapted to connect to an electrosurgical energy source such that the jaw members are capable of conducting energy through tissue held therebetween to affect a tissue seal;
a drive assembly disposed within the housing for moving the jaw members from the first position to the second position;
a movable handle mechanically associated with the housing being rotatable about a pivot to actuate the drive assembly through an actuating stroke which moves the jaw members from the open and closed positions;
a gear-like drive assembly being in mechanical engagement with the movable handle and the drive assembly, the gear-like drive assembly provides a variable-ratio mechanical advantage for manipulating tissue;
a rod pivotally connected to the movable handle at a first location and pivotally connected to a portion of the gear-like drive assembly at a second location, the rod being disposed at an angle with respect to the central longitudinal axis of the shaft; and
a trigger assembly operatively disposed relative to the movable handle which selectively advances a knife assembly which cuts tissue along the tissue seal.
11. An endoscopic bipolar forceps according to claim 10 wherein the gear-like drive assembly includes a variable stroke length which is dimensioned and configured to vary at least one of the force and range applied to the movable handle over the course of the stroke length.
12. An endoscopic bipolar forceps according to claim 10 wherein the pivotal connection between the rod and the movable handle is a direct connection.
13. An endoscopic bipolar forceps according to claim 12 wherein the pivotal connection between the rod and the gear-like drive assembly is a direct connection.
14. An endoscopic bipolar forceps according to claim 13 wherein the first location is disposed on a first side of the central longitudinal axis, and wherein the second location is disposed on a second, opposite side of the central longitudinal axis.
15. An endoscopic bipolar forceps, comprising:
a housing;
a shaft affixed to the housing and defining a central longitudinal axis, the shaft having an end effector assembly engaged at a distal end thereof, the end effector assembly including two jaw members movable from a first position in spaced relation relative to one another to at least a second position closer to one another for grasping tissue therebetween, each of the jaw members adapted to connect to an electrosurgical energy source such that the jaw members are capable of conducting energy through tissue held therebetween to affect a tissue seal;
a drive assembly disposed within the housing for moving the jaw members from the first position to the second position;
a movable handle mechanically associated with the housing being rotatable about a pivot to actuate the drive assembly through an actuating stroke which moves the jaw members from the open and closed positions;
a gear-like drive assembly being in mechanical engagement with the movable handle and the drive assembly, the gear-like drive assembly provides a mechanical advantage for manipulating tissue, wherein the gear-like drive assembly includes a variable stroke length which is dimensioned and configured to vary at least one of the force and range applied to the movable handle over the course of the stroke length;
a rod pivotally connected to the movable handle at a first location and pivotally connected to a portion of the gear-like drive assembly at a second location, the rod being disposed at an angle with respect to the central longitudinal axis of the shaft; and
a trigger assembly operatively disposed relative to the movable handle which selectively advances a knife assembly which cuts tissue along the tissue seal.
16. An endoscopic bipolar forceps according to claim 15 wherein the pivotal connection between the rod and the movable handle is a direct connection, and wherein the pivotal connection between the rod and the gear-like drive assembly is a direct connection.
17. An endoscopic bipolar forceps according to claim 16 wherein the first location is disposed on a first side of the central longitudinal axis, and wherein the second location is disposed on a second, opposite side of the central longitudinal axis.