| 摘要 |
A mixer circuit including a mixer (MIX) for mixing the RF signal supplied to the mixer (MIX) and reinforced in a preamplifier (LNA) with an LO signal supplied to the mixer (MIX). A line (L1) common to the RF signal and the LO signal is connected with the input of the preamplifier (LNA). In addition, there is another line (L2) which the RF signal and the LO signal have in common, and which connects the output of the preamplifier (LNA) with the input of the mixer (MIX), the level of the LO signal being below the compression point of the preamplifier (LNA).
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