Wireless communication device

Abstract

This invention provides a wireless communication device having high receiving sensitivity and made compact at low cost and having a high general purpose property, and able to transmit and receive information by multiplying the frequencies of plural channels several times and arbitrarily selecting all wireless frequency bands in a predetermined range. A receiving section has one crystal resonator 122, an inductor 124 able to be connected in series to the crystal resonator 122, and a channel change-over switch 123 for switching whether the inductor 124 is connected to the crystal resonator 122 and the ground, or the crystal resonator 122 is directly connected to the ground, and an adjusting change-over switch 125. A transmitting section has one crystal resonator 321, plural frequency setting adjusting circuits 312,313 each including an inductor 314,316 for determining a frequency oscillated from an oscillator, and a switching connection switch 318 for switching and connecting one of the plural frequency setting adjusting circuits 312,313 to a modulating circuit 320 connected to the crystal resonator 321.

Dependencies are inferred from the claim text.