| 摘要 |
PURPOSE:To form a means capable of detecting an accurate reception level even when a reception signal input level is high concerning a reception signal level detection circuit. CONSTITUTION:In a receiver 100 using a super heterodyne system, a reception signal level is detected from first and second intermediate frequency signals by using first and second envelope detectors 107 and 111 provided with a function adjusting a gain and offset voltage. Then, after a phase difference correction circuit 113 corrects phase difference, an adder 114 synthesizes them so as to set it to be a reception signal level detecting output. |
