| 摘要 |
The invention relates to an upstream unit (1) for a switched power amplifier (2) for a high-frequency transmission circuit (16). The upstream unit (1) supplies a pulse-length modulated HF pulse signal (22) to the switched power amplifier (2), wherein the linearity of the pulse length modulation and of the high-frequency transmission circuit is improved. The upstream unit (1) according to the invention has a first signal input (3) for a high-frequency, phase-modulated first input signal (18), a second signal input (4) for a second input signal (19) having a low frequency in comparison with the first input signal, a controllable first delay unit (5), a controllable second delay unit (7), a pulse generator (9) and a control unit (10). |
