| 摘要 |
To provide a switching circuit and a digital power amplifier capable of supplying much power to a load, as compared with a conventional circuit. A switching circuit of the present invention comprises a plurality of switching circuit units, in which first to fourth switching elements are connected in a loop in this order, having a DC power source, one end of which is connected to a node between the first and fourth switching elements, and the other end of which is connected to a node between the second and third switching elements. The plurality of switching circuit units are cascade-connected, with one of the external connection terminals of the switching circuit unit on the first stage being connected to one terminal of the load, and with the other of the external connection terminals of the switching circuit unit on the last stage being connected to the other terminal of the load. In a digital power amplifier of the present invention, the switching circuit of the present invention is employed as the switching circuit.
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