Abstract: A switching transformer includes a drive amplifier configured to output an input signal by amplifying a source signal, a primary circuit including a set of primary inductors, a primary switch, and a first primary connecting wire, the set of primary inductors being configured to receive the input signal at a first primary input/output terminal, the primary switch being configured to adjust an inductance of the set of primary inductors based on a first switching operation, and the first primary connecting wire being configured to electrically connect the first primary input/output terminal to an end of the primary switch, and a secondary circuit configured to mutually electrically couple to the first primary connecting wire and at least one primary inductor among the set of primary inductors.

Abstract: A fully differential amplifier includes: an input stage comprising a first amplification circuit and a second amplification circuit, one of which is configured to generate a push signal and the other of which is configured to generate a pull signal, each by amplifying a differential input signal; an output stage for generating a differential output signal based on the push signal and the pull signal; and a feedback circuit for providing common mode feedback to the first amplification circuit based on the differential output signal, wherein the second amplification circuit may include a passive network for setting a common mode voltage of the push signal or the pull signal.