| 摘要 |
In the radio-wave receiving apparatus according to the invention, a signal received by a receiving antenna (621) is amplified and the amplified received signal is input into a multi-stage frequency conversion circuit (623) including a plurality of basic circuits (624n) connected in series. The multi-stage frequency conversion circuit (625) converts the frequency of the received signal from the antenna into frequencies based on signals (gn) input from the frequency divider circuit sequentially, thereby to output a signal "a" which is obtained by conversions into gradually lower frequencies. Detection is performed by a detection circuit (626) on the basis of the signal. Thereby, a radio-wave receiving apparatus which requires no local oscillating circuit nor a PLL circuit and is also stable in operation and high in accuracy is realized. |
