Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Patent
1987-05-05
1988-07-05
Wong, Peter S.
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
323224, 323272, 323225, G05F 1618
Patent
active
047557397
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.
REFERENCES:
patent: 3559029 (1971-01-01), Yarema
patent: 4168477 (1979-09-01), Burchall
patent: 4242629 (1980-12-01), Shuey
patent: 4642550 (1987-02-01), Illuzzi et al.
Franzblau Bernard
Treacy David R.
U.S. Philips Corporation
Wong Peter S.
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