| 摘要 |
A transistorized electrosurgical unit for selectively providing high fequency, high voltage level, cutting or coagulation currents to electrosurgical patient electrodes and including a plurality of parallel connected power stages actuatable by a control signal to supply power to an output transformer connected to the electrodes, which power stages each include a power transistor biased in a nonsaturated condition and connected in series with a constant current transistor, and a signal source transistor connected to such power transistor to supply a switching signal thereto and to serve as a current flow path whenever current flow through the power transistor is interrupted. |
