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Index 453

Synchronous access mode realization circuit diagram of liquid crystal display

Published:2011/4/7 21:47:00 Author:Ecco | Keyword: Synchronous access mode, liquid crystal display

Synchronous access mode realization circuit diagram of liquid crystal display
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Multimeter delay switch circuit diagram

Published:2011/4/7 3:06:00 Author:Ecco | Keyword: Multimeter , delay switch

Multimeter delay switch circuit diagram
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The push-pull circuit diagram without output transformer

Published:2011/4/8 1:40:00 Author:Ecco | Keyword: push-pull circuit , without output transformer

The push-pull circuit diagram without output transformer
Figure 28-11 describes a practical circuit of push-pull circuit without output transformer. The impedance of speakers is 400Ω. The circuit is using the way of Figure 23-6, but the coupling between V0 and V1, V2 is not directly coupled but the coupling of the resistance and capacitance, and the signal voltage of loudspeaker is feedbacked to the cathode circuit of V0. The circuit doesn't need output transformer, but replaced by a special speaker with voice coil impedance in 400Ω. As the voice coil that is relatively heavy, so the problem is that there are mechanical difficulties, and the acoustic performance is poor, in addition, the push-pull circuit more complex than the normal. (View)

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The basic form circuit diagram of serial input current feedback

Published:2011/4/8 2:01:00 Author:Ecco | Keyword: basic form , serial input, voltage feedback

The basic form circuit diagram of serial input current feedback
Figure 17-10 shows a basic equivalent circuit of serial input current feedback circuit in an amplifier circuit. The net gain of this circuit a, the total amount of gain A and feedback N, are the same with voltage feedback. (View)

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The basic form 2 of parallel input voltage feedback

Published:2011/4/8 1:55:00 Author:Ecco | Keyword: basic form , parallel input , voltage feedback

The basic form 2 of parallel input voltage feedback
Figure 17-7 shows the applications of parallel input voltage feedback in power amplifier circuit.At first glance this circuit is like poles amplification voltage feedback circuit, so many people think they can be discussed according to this, but actually it's wrong, this is a pole amplification voltage feedback. (View)

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The basic form 1 of parallel input voltage feedback

Published:2011/4/8 1:46:00 Author:Ecco | Keyword: basic form, parallel input , voltage feedback

The basic form 1 of parallel input voltage feedback
Figure 17-5 shows the the basic equivalent circuit of parallel input voltage feedback circuit. (View)

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The display application circuit diagram of 74LS161 counter

Published:2011/4/8 2:12:00 Author:Ecco | Keyword: display application , counter

The display application circuit diagram of counter is as the chart 5.1 (View)

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The function block diagram of EXB series driver

Published:2011/4/8 2:25:00 Author:may | Keyword: driver

The function block diagram of EXB series driver
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Short-circuit protection function test method 1 of IGBT drive circuit

Published:2011/4/8 1:29:00 Author:may | Keyword: Short-circuit protection, function test method, IGBT drive

Short-circuit protection function test method 1 of IGBT drive circuit
The main problem IGBT solved is how to better protecting IGBT under the situation of over current, short circuit and over voltage. The error of over current generally need longer time to make the power supply to over heating, so the protection to it is mainly solve by main control board. In the diagram, C=10～470μF,Rlimit=10～100Ω,Creset =10nF. (View)

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IGBT switch equivalent circuit and open wave form

Published:2011/4/8 1:19:00 Author:may | Keyword: IGBT switch, equivalent, open wave form

IGBT switch equivalent circuit and open wave form
(a) equivalent circuit(b) open wave form (View)

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Reduced series resonant inverter main topological structure with resonance pole capacitor buffer

Published:2011/4/7 4:41:00 Author:may | Keyword: series resonant inverter, topological structure, resonance pole, capacitor buffer

Reduced series resonant inverter main topological structure with resonance pole capacitor buffer

Series resonant inverter with resonance pole capacitor buffer’s process of changing current: Routine RCVD buffer circuit adopts resistor to discharge, with the increase of switch frequency, the power consume in buffer is increase too, greatly reduce the efficiency of the whole inverter system. It can effectively reduce the shutoff loss of switch device that directly parallel connect a non-loss buffer capacitor between IGBT collector and emitter. It is more fit for high frequency inverter to feedback the power of the resistor loss in routine buffer to load or power supply. (View)

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Single-phase topological structure of cascade connection multilevel inverter basing on star point clamp type

Published:2011/4/7 4:23:00 Author:may | Keyword: Single-phase topological structure, cascade connection, multilevel inverter, star point clamp type

Single-phase topological structure of cascade connection multilevel inverter basing on star point clamp type
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IGBT shut off voltage wave and chopper circuit in advanced hard switching chopper circuit

Published:2011/4/7 4:05:00 Author:may | Keyword: IGBT shut off voltage wave, chopper, hard switching chopper

IGBT shut off voltage wave and chopper circuit in advanced hard switching chopper circuit
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The circuit and shutoff wave in two reverse blocking type IGBT reverse parallel connection

Published:2011/4/7 4:05:00 Author:may | Keyword: reverse blocking type, IGBT, reverse parallel connection, shutoff wave

The circuit and shutoff wave in two reverse blocking type IGBT reverse parallel connection
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Passive Lossless cushion circuit topological structure

Published:2011/4/6 4:22:00 Author:may | Keyword: passive Lossless, cushion, topological structure

Passive Lossless cushion circuit topological structure include two classes:1, minimum voltage stress element (MVS), is shown in diagram (a), (b)2 non-minimum voltage stress element (Non-MVS) , is shown in diagram (c), (d), (e), (f) (View)

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SKiiPPACK element circuit

Published:2011/4/6 3:36:00 Author:may | Keyword: element

SKiiPPACK element circuit
SKiiPPACK(Swmikron Integrated Intelligent Power Pack) series module is different from traditionary IGBT module. In SKiPPACK, DCB uropatagia with IGBT and diode chip is not weld at on one copper base, but get help from pressure unit of composite material, press almost the whole on radiator. (View)

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Output stage of SKHI series driver

Published:2011/4/6 3:30:00 Author:may | Keyword: Output stage, driver

Output stage of SKHI series driver
SKHI series driver divide RG into RG(on) and RG(off), shown above. This two parameters can control separately, and can separately adjust RG(on) and RG(oof) according to the capacity of IGBT, in order to get best drive effects. (View)