| 摘要 |
PURPOSE: To obtain an integrated audio amplifier capable of selecting a bridge or a stereo configuration by constituting an audio amplifier of a pair of amplifiers and correcting a continuous bias voltage level. CONSTITUTION: The audio amplifier is provided with two operational amplifiers 1, 2 respectively including output gain stages G1, G2 connected to two output pins OUT1, OUT2. Feedback resistor networksβ1 ,β2 , out of threeβ1 ,β2 ,β3 , are driven by the stereo confinguration and the networkβ3 is prepared for the bridge configuration. The amplifier includes also a fixed reference voltage source Vref, a control input terminal C and a comparator COM having a thereshold in its inside and the configuration is changed by biasing the terminal C and applying low or high voltage from the source Vref.
|
