National Taiwan University

Chieh-Jui Ho

Hen-Wai Tsao

The present disclosure relates, according to some embodiments, to a transformer power amplifier that allows for improved Q values and increased efficiency by reducing the capacitance coupling effect between metal layers and/or sidewalls of the same layer through carefully designed conductor structures in primary and secondary loops. A transformer power amplifier comprises a substrate, a conductor, a circular coil, a first amplifier, and a second amplifier, the conductor and the circular coil disposed on the substrate. A circular coil has a first input terminal and a second input terminal, in which the first input terminal and the second input terminal are spaced apart and opposite each other to form an opening. A first amplifier is connected to a first input terminal for receiving a first signal and a second amplifier is connected to a second input terminal for receiving a second signal, wherein the first signal and the second signal are differential signals.

Transformer power amplifier

A transformer hybrid is disclosed. The transformer hybrid comprises a substrate, a first conductor, a second conductor, a first coil, and a second coil. The first conductor includes a first elongate portion having a first side and a second side. The second conductor includes a second elongate portion having a third side and a fourth side, and the orientation of the second conductor intersects with that of the first conductor. The first coil is located near the first side and the third side. The second coil is located near the first side and the fourth side. When the direction of the loading current in the first coil is the same with that in the second coil, the first conductor has an inductive electromotive force. When the direction of the loading current in the first coil is different from that in the second coil, the second conductor has another inductive electromotive force. When phase difference exists between the loading currents, the two loading currents can be resolved to common mode and differential mode, so the inductive electromotive forces can be produced on the both conductors.

Growing community of inventors

Taipei, Taiwan

Chieh-Jui Ho