| 摘要 |
In an embodiment, a method and apparatus for downconverting a received RF signal in a wireless device where differential signals from an off-chip matching network may be input to a CGCS input stage of a mixer, which downconverts the signals to baseband or some intermediate frequency. The input stage includes a pair of NMOS transistors in a common-gate configuration and a pair of PMOS transistors in a common-source configuration. A potential advantage of the CGCS input stage over the existing CGO transconductance stage configuration is that by adding a common-source stage through the PMOS differential-pair, the transconductance gain is decoupled from the high Q matching network.
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