A broadband, linear power amplifier with an auto-transformer based output impedance transformation network for DVB-T (digital video broadcasting-terrestrial) is presented. The transformation network includes an auto-transformer combining a broadband, high efficient design with a small sized layout. Investigations on conventional reactive networks determine the improved characteristic. The complex auto-transformer design together with an amplifier stage can be faced by a structural approach. To maintain the high bandwidth of the power amplifier, a totem-pole driver is realized at the input. The power amplifier was implemented in a 0.25 μm SiGe BiCMOS process and consumes 375 mW at a supply voltage of 3 V. The high relative bandwidth of 120 % is verified by measurements. Further it exhibits an output referred 1 dB compression point of 24.4 dBm with an efficiency of 38 % at the working frequency of 700 MHz. Additionally system measurements for the DVB-T standard are performed and reveal a minimum of 5 dB back-off to match to the error vector magnitude requirements of the standard.