| 摘要 |
In the simplified diode mixer according to the invention the transformer supplying the local oscillator signal is replaced by a circuit means that prevents build-up of a d.c. voltage at the terminals of the mixer diodes (3, 4). The circuit means can be e.g. a coil (5), a strip line, or a diode pair. The filters (1, 2) for the signals to be mixed are realized as band-pass filters. The mixer is used e.g. in a GSM mobile phone.
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