| 摘要 |
<p>PURPOSE: To obtain a stabilized direct-current power supply having high output accuracy, by adding the difference between a reference voltage output from a DC-DC converter and that generated from a reference voltage generator to a supply voltage, and supplying a feedback input terminal with the result. CONSTITUTION: A DC-DC converter 18 regulates an externally supplied direct- current supply voltage and converts it into a direct-current supply voltage according to the difference between a voltage applied through a feedback input terminal 12 and an internally obtained reference voltage. The converter then outputs the result to the outside through a power supply output terminal 14. It also outputs an internally obtained reference voltage through a reference voltage output terminal 16. A reference voltage generator 20 accurately generates another reference voltage of the same value as that of the DC-DC converter 18. A feedback voltage corrector 22 adds the difference between that reference voltage and that output through the reference voltage output terminal 16 on the DC-DC converter 18 to a direct-current supply voltage output through the power supply output terminal 14, and supplies the feedback input terminal 12 with the result. This obtains a stabilized direct-current power supply having high output accuracy.</p> |
