Transistor power amplifier for transmitting systems

A transistor power amplifier for transmission systems, particularly in the short-wave range, comprising:

• a power amplifier input, a power amplifier output, and first and second parallel-connected signal paths extending between said power amplifier input and said power amplifier output;
• first amplifier means in said first signal path including an input coupled to said power amplifier input and an output, and having a first predetermined delay time and operable to subject input signals to an error;
• second amplifier means in said second signal path including an input and an output and having a second predetermined delay time;
• first delay means in said second signal path including an input coupled to said power amplifier input and an output, and operable to simulate said first predetermined delay time;
• second delay means in said first signal path including an input connected to said output of said first amplifier means and an output, an operable to simulate said second predetermined delay time;
• output means connecting said output of said second delay means and said output of said second amplifier means to said power amplifier output;
• signal branching means connected to said output of said first amplifier means for providing a portion of the output signal of said first amplifier means;
• correction amplifier means comprising a differential amplifier including first and second inputs and an output, said first input connected to said output of said first delay means, said second input connected to said signal branching means, and said differential amplifier operable to provide a correction signal which includes the error component produced in said first amplifier means inverted and of twice the magnitude thereof;
• and
• signal combining means coupling said output of said first delay means and said output of said differential amplifier to said input of said second amplifier means, comprising a transformer including a primary winding coupled to said output of said first delay means and to said output of said differential amplifier and a secondary winding connected to said input of said second amplifier means.