Reference voltage generating apparatus and switching power apparatus

摘要

There is provided a reference voltage generating apparatus including: a reference voltage source, a voltage retaining circuit, a switch and a controller. The reference voltage source generates a reference voltage. The voltage retaining circuit includes a first element circuit and a second element circuit, and the voltage retaining circuit outputs a voltage of a connection node between a first terminal of the first element circuit and a second terminal of the second element circuit. The switch is connected between the connection node and the reference voltage source. The controller controls the reference voltage source and the switch. The first element circuit includes at least a resistance component and the first element circuit is supplied with a first voltage at a third terminal and the second element circuit includes a resistance component and a capacity component and the second element circuit is supplied with a second voltage at a fourth terminal.

主权项

1. A reference voltage generating apparatus comprising:
a reference voltage source to generate a reference voltage; a voltage retaining circuit that comprises a first element circuit and a second element circuit, the voltage retaining circuit outputting a voltage of a connection node between a first terminal of the first element circuit and a second terminal of the second element circuit; a switch connected between the connection node and the reference voltage source; and a controller to control the reference voltage source and the switch, wherein the first element circuit includes at least a resistance component and the first element circuit is supplied with a first voltage at a third terminal, wherein the second element circuit includes a resistance component and a capacity component and the second element circuit is supplied with a second voltage at a fourth terminal.