Patent EP0095724A2 successfully refreshed from Google Patents.
EP0095724A2
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EP
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Switching circuit
Assignee: Nippon Chemi Con Corp
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Filing: 1983-05-25
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Granted: —
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Expires: 2003-05-25
Abstract
Abstract A switching regulator includes a switching transistor for converting a d.c. input to an a.c. voltage, a d.c. reproducing circuit for converting the resulting a.c. voltage to a d.c. voltage, a drive transistor provided between the base of the switching transistor and the output of the d.c. reproducing circuit. The drive transistor thus arranged causes a drive current to flow through the switching transistor and adds the drive current to the reproducing d.c. output in order to improve the tranducing efficiency.
Inventors
- 👤 Tetsuhiko Nippon Chemi-Con Corporation Shimpo
- 👤 Isao Nippon Chemi-Con Corporation Fujihata
- 👤 Atsushi Nippon Chemi-Con Corporation Yanase
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 18:35
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/145; H02M3/155; H02M3/156; H02M3/1563
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
77 words
A switching re q ulator including a switching transistor for converting a d.c. input to an a.c. voltage, a d.c. reproducing circuit for converting the resulting a.c. voltage to a d.c. voltage, and a drive transistor that is provided between the base of said switching transistor and the output side of said d.c. reproducing circuit and which causes a drive current to flow through said switching transistor and adds the drive current to the reproduced d.c. output.
Claim 2
Dependent Claim
77 words
A switching re q ulator including a switching transistor for converting a d.c. input to an a.c. voltage, a d.c. reproducing circuit for converting the resulting a.c. voltage to a d.c. voltage, and a drive transistor that is provided between the base of said switching transistor and the output side of said d.c. reproducing circuit and which causes a drive current to flow through said switching transistor and adds the drive current to the reproduced d.c. output.
Claim 3
Dependent Claim
45 words
A switching regulator according to Claim 1 wherein the base of said drive transistor is provided with a positive feedback of the a.c. voltage formed by said switching transistor, as well as with control pulses whose width varies with the level of the d.c. output.
Claim 4
Dependent Claim
38 words
A switching regulator according to Claim 1 wherein the base of said drive transistor is provided with control pulses produced by superposing the waveform of a reference function on the variation in the level of the d.c. output.
Claim 5
Dependent Claim
69 words
A switching regulator including a switching transistor for converting a d.c. input to an a.c. voltage, a first transistor for driving said switching transistor, a second transistor for controlling the operation of said first transistor according to the variation in the level of the d.c. output voltage being applied to the base of said second transistor, and a constant-voltage diode for setting the operating level of said second transistor.
Claim 6
Dependent Claim
69 words
A switching regulator including a switching transistor for converting a d.c. input to an a.c. voltage, a first transistor for driving said switching transistor, a second transistor for controlling the operation of said first transistor according to the variation in the level of the d.c. output voltage being applied to the base of said second transistor, and a constant-voltage diode for setting the operating level of said second transistor.
Claim 7
Dependent Claim
27 words
A switching regulator according to Claim 4 wherein the sweitching pulses generated in said switching transistor are positively fed back to the base of said first transistor.
Claim 8
Dependent Claim
25 words
A switching regulator according to Claim 4 wherein the base of said first transistor is provided with an input from a reference waveform generator circuit.
Claim 9
Dependent Claim
54 words
A switching regulator including a switching transistor for converting a d.c. input into an a.c. voltage and a transistor to the base of which the a.c. voltage provided by said switching transistor is fed back through a positive feedback circuit and which causes a driving current to run through said switching transistor by oscillation.
Claim 10
Dependent Claim
54 words
A switching regulator including a switching transistor for converting a d.c. input into an a.c. voltage and a transistor to the base of which the a.c. voltage provided by said switching transistor is fed back through a positive feedback circuit and which causes a driving current to run through said switching transistor by oscillation.
Claim 11
Dependent Claim
16 words
A switching regulator according to Claim 7 wherein said feedback circuit is composed of a reactance.
Claim 12
Dependent Claim
58 words
A switching circuit comprising switching transistor that opens or closes responsive to an input pulse and a switching correct or circuit that picks up a pulse from the switching transistor after reversing its polarity, differentiates said reversed pulse, and provides the base of said switching transistor with the differentiated pulse as it is superposed on the input pulse.
Claim 13
Dependent Claim
58 words
A switching circuit comprising switching transistor that opens or closes responsive to an input pulse and a switching correct or circuit that picks up a pulse from the switching transistor after reversing its polarity, differentiates said reversed pulse, and provides the base of said switching transistor with the differentiated pulse as it is superposed on the input pulse.
Claim 14
Dependent Claim
43 words
A switching circuit according to Claim 9 wherein said switching corrector circuit is composed of a choke transformer connected to said switching transistor and a capacitor for providing the base of said switching transistor with pulses of reversed polarity from said choke transformer.
Claim 15
Dependent Claim
72 words
A switching circuit including a switching transistor for converting a d.c. voltage, a drive transistor for causing the switching transistor to perform switching operation, a control transistor that detects a variation in the level of the d.c. output voltage and controls the switching operation of said drive transistor according to the detected variation, and constant current supply means for providing a constant operating current through the control transistor and the drive transistor.
Claim 16
Dependent Claim
72 words
A switching circuit including a switching transistor for converting a d.c. voltage, a drive transistor for causing the switching transistor to perform switching operation, a control transistor that detects a variation in the level of the d.c. output voltage and controls the switching operation of said drive transistor according to the detected variation, and constant current supply means for providing a constant operating current through the control transistor and the drive transistor.
Claim 17
Dependent Claim
44 words
A switching circuit according to Claim 11 wherein said constant current supply means has a constant-voltage circuit between an input terminal and an output terminal on the higher potential side, said circuit supplying a constant current to said drive transistor and the control transistor.
Claim 18
Dependent Claim
48 words
A switching circuit according to Claim 11 wherein said constant current supply means includes a'constant-voltage circuit between an input terminal and an output terminal on the higher potential side, and a constant-current circuit that produces a constant current in response to a bias input to said constant-voltage circuit.
Claim 19
Dependent Claim
95 words
A switching circuit including a switching transistor for converting a d.c. input to an a.c. voltage, a drive transistor for causing the switching transistor to perform switching operation, a control transistor that detects a variation in the level of the d.c. output voltage on the base by comparison with a reference voltage and controls the switching operation of said drive transistor according to the detected variation, and a constant-voltage circuit that is connected between the input terminals receiving said d.c. input and which provides a constant operating current flowing through said drive and control transistors.
Claim 20
Dependent Claim
95 words
A switching circuit including a switching transistor for converting a d.c. input to an a.c. voltage, a drive transistor for causing the switching transistor to perform switching operation, a control transistor that detects a variation in the level of the d.c. output voltage on the base by comparison with a reference voltage and controls the switching operation of said drive transistor according to the detected variation, and a constant-voltage circuit that is connected between the input terminals receiving said d.c. input and which provides a constant operating current flowing through said drive and control transistors.
Claim 21
Dependent Claim
53 words
A switching circuit according to Claim 14 wherein said constant-voltage circuit is made of a resistor connected in series with a constant-voltage diode and supplies a constant current to said drive and control transistors from the junction between said resistor and the diode upon application of an input voltage to said constant-voltage circuit.
References Cited (Backward Citations)
No citation records indexed.
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