| 摘要 |
There is a need for an inexpensive, high-performance, fully-integrable, mult i- standard transceiver. The invention provides a topology that satisfies this need, consisting of: an active mixer, followed by a high pass filter, and a passive mixer. The input signal is modulated up, or demodulated down, using a pair of complementary, aperiodic mixing signals. The use of aperiodic mixing signals allows a fully-integrated transceiver to be built. Several embodimen ts of the active mixer are also presented, including those having electrically- adjustable performance and allowing multiple RF signal inputs. This allows t he topology of the invention to be employed in multi-band, multi-frequency applications, while still providing high performance.
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