The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 1998
Filed:
Mar. 13, 1997
U.S. Philips Corporation, New York, NY (US);
Abstract
A controlled power supply source is described, which has a parallel control member having a controllable semiconductor component whose load path is arranged between output terminals of the power supply source and whose control input is connected to an output of a control device, the control device having a reference input for supplying a reference voltage. The control device has a control amplifier which is fed from a current bank having at least one constant current source, an actual value input of said control amplifier receiving the voltage between the output terminals of the power supply source, and a nominal value input receiving the reference voltage from the reference input of the control device. An output of the control amplifier constitutes the output of the control device which further has a preliminary current stage which, dependent on the difference between the voltages at the actual value input and at the nominal value input of the control amplifier, applies a preliminary current to this control amplifier, which preliminary current is applied to the control input of the semiconductor component at least partly via the output of the control device. This provides the possibility of controlling high power supply voltages, and when the source is switched on, only a very short period of time is required to reach the linear operating range of the parallel control member.