Patent ID: 6300829
Filing Date: 2001-10-09
Classification: H03F

Abstract:
A RF power amplifier system, comprising:a RF source for providing a train of RF pulses exhibiting RF cycles of a fixed frequency and wherein each pulse is of a fixed amplitude and duration;a DC voltage source;a bridge circuit including a first transistor switch for, when on, connecting said DC voltage source across said load for DC current flow therethrough in a first direction and a second transistor switch for, when on, connecting said DC voltage source across said load for DC current flow therethrough in a second direction;a switch driver for, when enabled, passing said RF pulses for driving said first and second transistor switches on and off at a frequency dependent upon that of said RF pulses and in such a manner that current from said DC voltage source alternately flows in said first and second directions through said load;a driver controller for providing turn-on signals and selectively applying them to said switch driver for enabling said switch driver for passing said RF pulses to said transistor switches;said switch driver including first and second logic gates respectively connected to said first and second transistor switches; andfirst and second inductive steering circuits respectively interposed between said first logic gate and said first transistor switch and said second logic gate and said second transistor switch.