Patent ID: 8908798

Claim:
A radio frequency predriver [ 12 ] for driving a high power radio frequency amplifier [ 14 ] in a transmission direction, comprising: a bitstream generator [ 20 ] operative for receiving a baseband digital data signal [ 16 ] and a desired carrier frequency [ 18 ] and generating an input bitstream [ 21 ] at the desired carrier frequency encoding the digital data signal [ 16 ]; an oscillator [ 26 ] operative for creating a master clock signal [ 25 ]; a resynchronizing digital-to-analog converter [ 24 ] operative for generating a resynchronized bitstream signal [ 27 ] encoding the digital data signal [ 16 ] based on the input bitstream [ 21 ] and the master clock signal [ 25 ]; a band pass filter [ 28 ] operative for generating a filtered bitstream signal [ 29 ] based on the resynchronized bitstream signal [ 27 ]; and a power amplifier [ 30 ] operative for generating an output bitstream [ 31 ] based on the filtered bitstream signal [ 29 ] configured to drive the high power radio frequency amplifier [ 14 ], wherein: the resynchronizing digital-to-analog converter [ 24 ] is a multiple-bit parallel digital-to-analog converter; the bitstream generator [ 20 ] is further operative for performing deserialization of the input bitstream [ 21 ]; and the resynchronizing digital-to-analog converter [ 24 ] is further operative for performing serialization of the resynchronized bitstream signal [ 27 ].