VARIABLE CAPACITANCE ELEMENT, PACKAGED CIRCUIT, RESONANT CIRCUIT, COMMUNICATION APPARATUS, COMMUNICATION SYSTEM, WIRELESS CHARGING SYSTEM, POWER SUPPLY APPARATUS, AND ELECTRONIC APPARATUS

摘要

The present provides a variable capacitance element enabling a further reduction in capacitance variation among variable capacitance elements, and provides a packaged circuit including the variable capacitance element. A variable capacitance element is configured to include an element body unit, a compensation unit, a first external terminal for signals, a second external terminal for signals, external terminals for control, and external terminals for capacitance compensation. The compensation unit has second variable-capacitance capacitor units C9 to C 11, each including a second dielectric layer formed of a ferroelectric material, and is connected to the element body unit, and has a capacitance varying according to a control voltage signal.

主权项

1. A variable capacitance element, comprising:
an element body unit which includes a first variable capacitor unit including a first dielectric layer formed of a ferroelectric material and has a capacitance varying according to a control voltage signal applied from outside; a compensation unit which includes a second variable capacitor unit including a second dielectric layer formed of the ferroelectric material, is connected to the element body unit, and has a capacitance varying according to the control voltage signal; a first external terminal for signals which is connected to the element body unit and configured to receive an input of an AC signal; a second external terminal for signals which is connected to the element body unit or the compensation unit and configured to receive an input of an AC signal; an external terminal for control which is connected to the element body unit and configured to receive an input of the control voltage signal; and an external terminal for capacitance compensation which is connected to the compensation unit.