| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a frequency conversion circuit capable of frequency conversion even if the amplitude of a local signal is low, and suppressing increase in power consumption. <P>SOLUTION: A frequency conversion circuit generates a multiplication signal by multiplying an amplification signal, that is generated by an amplification part containing a first transistor in which a drain terminal is connected to a first power supply potential, with a local signal. The frequency conversion circuit includes a converter that contains a second transistor to convert the amplification signal to a current signal, an impedance element which connects the amplification part to the converter at high impedance in terms of AC and delivers a DC current input from the amplification part to the converter, and a switching circuit which contains two third transistors connected in parallel, is connected to the drain terminal of the converter through the impedance element, and multiplies the current signal with the local signal to generate the multiplication signal. <P>COPYRIGHT: (C)2012,JPO&INPIT |
