| 摘要 |
PROBLEM TO BE SOLVED: To provide a multistage differential amplifier that reconciles band broadening and gain reduction suppression.SOLUTION: The multistage differential amplifier includes a plurality of differential amplifiers connected in series, and a DC component cutoff section for cutting off a DC component of input signals. The DC component cutoff section is arranged between the plurality of differential amplifiers, and a transistor size of a first differential amplifier arranged just behind the DC component cutoff section is equal to or greater than a transistor size of a second differential amplifier arranged two stages before the DC component cutoff section. |
