| 摘要 |
<p>A double balanced mixer circuit comprising a differential pair (102) of first amplifier elements (T1, T2) responsive to an RF differe ntial input signal, double differential pairs (104, 106) of second amplifier elements (T3, T4, T5, T6) responsive to an LO differential input signal, and differential output terminals (406) connected with the second amplifier paths. Coup ling elements provide first and second parallel DC connections between DC voltage supply rails (+V, -V) for the first and the double second amplifier paths respecti vely and a series RF connection of the first and second amplifier paths between the supply rails so as to produce a mixed differential amplified signal at the differ ential output terminals (406). The coupling elements include respective transmission lines (ZL6, ZL13 & ZL7, ZL14) in the first amplifier paths connected bet ween one of the DC voltage supply rails (+V) and respective ones of the first amplifier elements (T1, T2) and a common transmission line (Z L1) connected between the other of the DC voltage supply rails (-V) and both the first amplifier elements (T1, T2).</p> |
