PURPOSE: To avoid required information from being missed by reproducing a specific program while increasing the sound volume to a prescribed sound volume even if the sound volume is reduced small when the specific program is identified.
CONSTITUTION: When a program identification signal is confirmed in a coincidence detecting circuit 4, an FF circuit FF is set and an H output is brought from a terminal Q and a switch SW2 is turned on. A voltage either high voltage from a Va or a Vb is given to a voltage controlled amplifier VCA as a control voltage through the operation of an OR output circuit 73. In confirming an identification signal of a special program such as traffic information, even when a variable DC output voltage is Vb or below, that is, the program is reproduced so far at a small sound volume, the output Vb from a fixed control voltage generating circuit 72 is given to the voltage controlled amplifier VCA as a control voltage and a demodulation signal is reproduced with a predetermined specific sound volume.
YOKOGAWA TOMOHISA
KUROSAKI MASAKANE
| JPS5819547B2 | 1983-04-19 |