§
Luxuse
Patent Intelligence
Sign In
Patent US5719609A successfully refreshed from Google Patents.
← Back to Patent Explorer
EP0403088A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Improvements relating to DC-DC converters

Assignee: Plessey Aerospace Ltd
•
Filing: 1990-05-21
•
Granted: —
•
Expires: 2010-05-21
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A regulated switch mode DC-DC converter comprises a logic gate package connected to a DC power supply and providing four NOR logic gates. Two of the NOR gates are connected for providing an oscillator circuit producing one or more AC outputs which are applied to the inputs of the other respective NOR gates which act as driver gates for power transistor means. The power transistor means conducts intermittently in order to provide from a DC power supply a regulated current which may be fed to the primary of a de-coupling or isolating transformer the secondary of which feeds a rectifier circuit which provides a DC regulated output. The ON/OFF periods of the power transistor means are controlled by control means in order to provide the requisite regulation of the DC output of the converter.

Inventors

  • 👤 Stanley Beddoe

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 03:43
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/337; H02M3/3376; H02M3/3378

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 118 words
A regulated switch mode DC-DC converter comprising a logic gate package connected to a DC power supply and providing four NOR logic gates, in which two of the NOR gates are connected for providing an oscillator circuit producing one or more AC outputs which are applied to the inputs of the other respective NOR gates which act as driver gates for power transistor means which conducts intermittently in order to provide from the DC power supply a regulated DC output and in which the ON/OFF periods of the power transistor means are controlled by control means in order to provide regulation of the DC output of the converter notwithstanding variations in the voltage of the DC power supply.
Claim 2
Dependent Claim 118 words
A regulated switch mode DC-DC converter comprising a logic gate package connected to a DC power supply and providing four NOR logic gates, in which two of the NOR gates are connected for providing an oscillator circuit producing one or more AC outputs which are applied to the inputs of the other respective NOR gates which act as driver gates for power transistor means which conducts intermittently in order to provide from the DC power supply a regulated DC output and in which the ON/OFF periods of the power transistor means are controlled by control means in order to provide regulation of the DC output of the converter notwithstanding variations in the voltage of the DC power supply.
Claim 3
Dependent Claim 44 words
A regulated switch mode DC-DC converter as claimed in claim 1, in which the oscillator circuit provides two AC outputs in anti-phase which are applied to the respective inputs of the NOR gates the outputs from which drive two power transistors which conduct alternately.
Claim 4
Dependent Claim 67 words
A regulated switch mode DC-DC converter as claimed in claim 1 or 2, in which the control means comprises capacitor means arranged to the charged from a feedback circuit from the power transistor means output circuit and connected to the inputs of the NOR gates which act as driver gates for the power transistor means so as to control the switching points of the power transistor means.
Claim 5
Dependent Claim 65 words
A regulated switch mode DC-DC converter as claimed in any preceding claim, in which the output circuit from the power transistor means comprises an isolating transformer having one output which is rectified by a full-wave rectifier circuit which provides the regulated DC output of the converter and another output which is rectified by a full-wave rectifier which provide the feedback for charging the capacitor means.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag