| 摘要 |
<p>A D-class power amplifier of two channels in which an increase in power voltage due to a regenerative current is prevented and a high efficiency in utilization of electric power is attained. Two D-class power amplifying circuits (40, 50) included in the D-class power amplifier of the two channels are constructed by opposite phases. A preprocess is performed only to low frequency components of input signals (31, 33) so that they have a substantially equal amplitude in the two channels, and the resultant low frequency components are supplied to the D-class power amplifying circuits (40, 50) respectively. The other ends of loads (41, 51) connected to the D-class power amplifying circuits (40, 50) are connected to a neutral potential point of the power voltage. <IMAGE></p> |
