| 摘要 |
A power detector comprises a pair of transistor amplifier elements having respective control terminals for receiving with opposite polarities a radio/mm-wave frequency signal whose power is to be detected. Respective alternately-conductive parallel amplifier paths are controlled by the control terminals. A low pass filter and current mirror is responsive to the combined currents flowing in the parallel amplifier paths for producing a low pass filtered signal. A detector output stage is responsive to the low pass filtered signal. Each of the pair of amplifier elements includes a respective impedance through which flows current from the respective amplifier path and current from the respective control terminal.
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