| 摘要 |
PURPOSE:To decrease current consumption by providing a function of an adder circuit to a diode detection circuit so as to reduce the number of components. CONSTITUTION:An input signal IF1 to a receiver is converted into a signal IF2 by a mixer 1, supplied to a detection circuit 4 via a noise suppression filter 2 and an amplifier circuit 3 and a DC level signal proportional to the signal IF2 level is outputted. The DC signal is sent as a reception level via diodes D1, D2 of the detection circuit 7. When the IF1 signal reaches a level B or over, the reception level is inputted from the circuit 4 to the circuit 7 and the detection level at the circuit 7 is added to the reception level from the circuit 4 and the result is outputted as the reception level. |
