| 摘要 |
<p>An object of the present invention is to integrate circuits for frequency conversion processing of an input signal of the GHz band. In a receiver (21), an input signal from an antenna (24) is amplified after components thereof outside a frequency band for communication network being removed, and is supplied to an arithmetic processing unit (36). A plurality of sampling circuits within the arithmetic processing unit (36) respond to a plurality of clock signals of which frequencies are equal and of which phases are different, respectively, and sample the input signal after amplification. The sum-of-products arithmetic unit within the arithmetic processing unit (36) responds any one of the clock signals and performs sum-of-products operation periodically using a plurality of sample signals exhibiting the sampling results of all the sampling circuits, respectively. A signal outputted from the sum-of-products arithmetic unit includes a reflected component equivalent to the component within the frequency band of the input signal being frequency-converted. A channel selection unit (29) extracts the reflected component from the signal and converts the carrier frequency of the reflected component into an intermediate frequency. A reflected component after conversion is demodulated. <IMAGE></p> |
