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Amplifier designed to generate a rectangular voltage signal with soft switching on a capacitive load

A capacitive load, rectangular voltage technology, applied in the field of amplifiers, can solve problems such as conduction loss

Inactive Publication Date: 2006-04-19
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The main disadvantage of this circuit is that it includes a large number of active components (switches and diodes), which during circuit operation are due to the high rms value (effective value) of the current iL when they are closed and the reverse recovery losses (reverse recovery loss) resulting in conduction loss

Method used

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  • Amplifier designed to generate a rectangular voltage signal with soft switching on a capacitive load
  • Amplifier designed to generate a rectangular voltage signal with soft switching on a capacitive load
  • Amplifier designed to generate a rectangular voltage signal with soft switching on a capacitive load

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Embodiment Construction

[0038] According to the invention, the circuit for producing soft switching while also recovering energy is limited to a series connection of an inductive element L2 and a capacitive element C2, the combination being connected across the equivalent capacitor Cp of the discharge chamber of the panel. exist Figure 4 The circuit is shown in , for generating a rectangular signal to be applied to a cell electrode Y or Z during a cell sustaining phase, or to a column electrode of a cell during a cell addressing phase.

[0039] In case of a sustain operation, the voltage VS is a voltage of about 200 volts for sustaining the discharge cells, and in case of addressing a column of discharge cells, the voltage VS is an address voltage of about 60 volts. The capacitance of capacitor Cp varies with the mode of operation (synchronous or asynchronous transition) and type of operation (address phase or sustain phase). Capacitor Cp corresponds to the equivalent capacitor of the panel seen fr...

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PUM

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Abstract

The present invention relates to an amplifier designed to generate a rectangular voltage signal with soft switching on a capacitive load (Cp), comprising a half-bridge structure consisting of two switches (M1, M2), which is connected between a supply terminal (VS) and a reference terminal (GND), the mid-point of said structure being connected to said capacitive load, and a soft-switching circuit with energy recovery. To limit the conduction losses in the amplifier, the soft-switching circuit with energy recovery comprises no active component, such as a diode or transistor. According to the invention, it is formed only from an inductive elements (L2) connected in series with a capacitive element (C2) between the terminals of said capacitive load. Advantageously, the inductive element comprises a saturable inductor in order to limit the conduction losses of the amplifier.

Description

technical field [0001] The invention relates to an amplifier designed to generate a rectangular voltage signal with soft switching of capacitive loads, the amplifier comprising: a half-bridge structure comprising two switches, said structure being connected between a supply terminal and a reference terminal , the midpoint of the structure is connected to the capacitive load; and a soft switching circuit with energy recovery. In particular, the present invention relates to amplifiers designed to generate high voltage rectangular sustain or address signals in plasma display panels. Background technique [0002] Generally, a plasma display panel includes a plurality of discharge cells organized in rows and columns. In the currently used coplanar technique, each discharge cell has three electrodes: [0003] a column electrode, mainly for addressing the discharge cells; the column electrodes of all the discharge cells of the panel are connected to the column driver; and [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/28G09G3/20H01J17/49G09F9/313G09G3/288G09G3/296
CPCG09G3/2965H03F3/2173H03F3/217G09G3/20G09G3/296
Inventor 迪迪尔·普洛奎恩
Owner THOMSON LICENSING SA