Samsung Electronics Co., Ltd.

Wonjun Jung

Seunghoon Kang

Jisoo Chang

Kiyong Son

Byeongwan Ha

Disclosed is a transmission radio frequency (RF) circuit including a transmission mixer configured to receive an intermediate frequency (IF) signal and up-convert the IF signal into an RF signal, a driving amplifier configured to amplify the RF signal, and an LLC filter electrically connected to a differential output of the transmission mixer and a differential input of the driving amplifier, the LLC filter comprising a first inductor connecting a first node of the differential output of the transmission mixer to a first intermediate node, a second inductor connecting a second node of the differential output of the transmission mixer to a second intermediate node, a third inductor connecting the first intermediate node to the second intermediate node, and a capacitor in parallel with the third inductor.

Passive mixer including LLC filter and RF transmitting circuit including passive mixer

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.

Switching transformers and electronic systems including the same

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.

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Seoul, South Korea

Wonjun Jung