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发明公开
CN104966117A 通信电路和移动终端 失效 - 权利终止

通信电路和移动终端
摘要：
RFIC(11)包括IO端子(11P)。同样，控制IC(12)包括IO端子(12P)。可变电容元件(14)包括控制端子(14P)。该可变电容元件(14)包括根据控制电压来确定电容值的电容元件、以及对输入控制端子的电压进行分压来产生所述控制电压的电阻分压电路。RFIC(11)或控制IC(12)经由信号线(15A、15B)向可变电容元件(14)提供控制数据。可变电容元件(14)与天线线圈(13)一同构成LC并联谐振电路即天线电路，将天线电路的谐振频率定义为规定频率。
摘要（英）：

In a communication circuit, an RFIC includes an IO terminal (11P), and a control IC (12) includes an IO terminal (12P). A variable capacitance element (14) includes control terminals (14P), a capacitance element (14) with a capacitance value that is determined according to a control voltage, and a resistance voltage divider circuit configured to generate the control voltage by dividing a voltage inputted to the control terminals. The RFIC (11) or the control IC (12) supplies control data to the variable capacitance element via a signal line (15A, 15B). The variable capacitance element (14), along with an antenna coil (13), constitutes an antenna circuit of an LC parallel resonance circuit, and sets a resonant frequency of the antenna circuit to be a predetermined frequency.

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