| 摘要 |
PROBLEM TO BE SOLVED: To suppress the deterioration of current detection performance of a current detection circuit which detects current flowing in a load of a BTL output circuit. SOLUTION: Resistors 35, 36 for current detection are serially connected to output terminals of two amplifiers 31, 33 constituting the BTL output circuit, respectively, difference between voltage obtained by adding output voltage of the amplifier 31 and voltage on the side of a load 34 of the resistor 36 together and voltage obtained by adding output voltage of the amplifier 33 and voltage on the side of a load 34 of the resistor 35 together is calculated in an addition/subtraction amplifier 37 to obtain detection output voltage v<SB>d</SB>proportional to the current i<SB>o</SB>flowing in the load 34. COPYRIGHT: (C)2008,JPO&INPIT
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