05063489 is referenced by 22 patents and cites 6 patents.

In order to obtain a stable dc output from a switching regulator of a type in which a switching control arrangement is provided with an optical coupler, an A-D converter is arranged to provide the optical coupler with a digital error signal. This error signal corresponds to a difference between the regulated dc output and a reference voltage. The digital output of the optical coupler is converted into a corresponding analog signal at a D-A converter. The output of the D-A converter is applied to a comparator and is compared thereat with a reference signal voltage for controlling a switching device.

Title
Switching regulator having improved switching control arrangement
Application Number
7/505391
Publication Number
5063489
Application Date
April 6, 1990
Publication Date
November 5, 1991
Inventor
Katsuhiko Inaba
Tokyo
JP
Agent
Sughrue Mion Zinn Macpeak & Seas
Assignee
NEC Corporation
JP
IPC
H02M 3/335
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