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:
Jul. 05, 1988
Filed:
May. 05, 1987
Marinus C Van Buul, Breda, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A switched direct voltage converter comprises at least one semiconductor switch (S1) controlled by a control circuit (CC) via a switching input (SI). The semiconductor switch is formed by at least one pair of complementary field effect transistors (T1, T2) connected in a series arrangement (I1) having through-connected voltage-controlled gate electrodes. A converted direct voltage (VS) is obtained by changing over the switch (S1) between first and second supply voltage terminals (VT1, VT2). An input terminal (IT) for connection to a direct voltage supply source (V1) is connected via a coil (L) to a series junction point (SP) between the pair of complementary field effect transistors (T1, T2). A converter output terminal (OT) is connected to one (VT1) of the supply voltage terminals, and a capacitor (C3) is connected between the first and second supply voltage terminals (VT1, VT2) and between the input and output terminals (IT, OT), respectively. As a result, in the pair of complementary field effect transistors (T1, T2') the regular output has become an input (supply voltage connection) and a regular supply voltage terminal has become the output. The field effect transistor property of conducting current in two directions is utilized in the converter. A buffer-integrated circuit may be used with the interchanged connections in the converter.