CN102548105A - Second-level automatic optical inspection (AOI) light source and AOI system - Google Patents

Abstract

The invention discloses a second-level automatic optical inspection (AOI) light source and an AOI system. The second-level AOI light source comprises a serial communication circuit for driving a controller circuit to operate, the controller circuit for controlling the current of circuit blocks of a light emitting diode (LED) drive circuit and the LED drive circuit, wherein the LED drive circuit comprises 16 circuit blocks; 8 circuit blocks in the 16 circuit blocks form an inner ring light source, the inner ring light source is divided into 8 brightness control areas, and each circuit block corresponds to one brightness control area; and the other 8 circuit blocks in the 16 circuit blocks form an outer ring light source, the outer ring light source is divided into 8 brightness control areas, and each circuit block corresponds to one brightness control area. By the second-level AOI light source of the technical scheme, defect parts of a product to be inspected can be highlighted by controlling the brightness of the 16 brightness control areas, so that inspection accuracy and inspection efficiency are improved.

Description

Two grades of automatic optics inspection light sources and automatic optical detecting system

Technical field

The present invention relates to Systems for optical inspection technical field, more particularly to two grades of automatic optics inspection light sources and automatic optical detecting system.

Background technology

Automatic optics inspection (AOI) technology is a current popular industry trend, it mainly matches inspection, the identification of the computer acquisition and image processing system of rear end to carry out some products etc. with image devices such as light source, camera lens and CCD, this technology can mitigate the burden of artificial detection product significantly, effectively improve operating efficiency.

A kind of existing automatic optical detecting system, available for many IMAQs of paster PCB, it includes two grades of automatic optics inspection light sources, optical lens, video camera, image pick-up card, view data coffret, computer, high accuracy X-Y mobile platforms.Wherein two grades automatic optics inspection light sources include inner ring light source and outer shroud light source, and inner ring light source is used to provide vertical illumination, and outer shroud light source is used to provide horizontal illuminance.High-precision X-Y mobile platforms include the first servomotor for being used to control video camera and optical lens in Y-axis to move and for controlling the first mobile servomotor of the product (paster PCB) to be measured in X-axis.Two grades of automatic optics inspection light sources are irradiated to a certain detection zone on paster PCB to be detected, light after reflection is imaged on the photoelectric sensor of video camera again after being reflected through optical lens, image is converted into electric signal, and electric signal is saved in computer after carrying out analog-to-digital conversion through image pick-up card；Computer operational monitoring software, according to the view data of collection, whether the detection zone for obtaining paster PCB is qualified or belong to the testing result of certain class defect.

Two grades of automatic optics inspection light sources of prior art can only unify adjustment brightness of illumination, when to protrude defect part (or product to be measured needs the intermediate portions of prominent detection) of product to be measured, need repeatedly mobile high-precision X-Y platform, adjust product to be measured and video camera, the position relationship of optical lens, the control process of high-precision X-Y platform is complex, the accuracy of detection is influenceed, detection efficiency is reduced.

The content of the invention

First purpose of the present invention is to provide a kind of two grades of automatic optics inspection light sources, and two grades of automatic optics inspection light sources, to improve detection accuracy, can improve detection efficiency by controlling the brightness in 16 brilliance control regions to protrude the defect part of product to be measured.

Second object of the present invention is to provide a kind of automatic optical detecting system, the level automatic optics inspection light source of the automatic optical detecting system can be by controlling the brightness in 16 brilliance control regions to protrude the defect part of product to be measured, to improve detection accuracy, detection efficiency is improved.

A kind of two grades of automatic optics inspection light sources, include controller circuitry, the LED drive circuit of the electric current of the serial communication circuit for the work of drive control device circuit, the circuit block for controlling LED drive circuit；The output end of serial communication circuit and the input of controller circuitry are connected, and the output end of serial communication circuit and the input of LED drive circuit are connected；8 pieces of circuit blocks that LED drive circuit is included in 16 pieces of circuit blocks, 16 pieces of circuit blocks constitute inner ring light source, and inner ring light source is divided into 8 brilliance control regions, 1 brilliance control region of every piece of circuit block correspondence；Other 8 pieces of circuit blocks in 16 pieces of circuit blocks constitute outer shroud light source, and outer shroud light source is divided into 8 brilliance control regions, 1 brilliance control region of every piece of circuit block correspondence.

Wherein, every piece of circuit block includes NOT gate, the 1st conductive gate, the 2nd conductive gate, triode Q1, Q2 of NPN type, resistance R1, R2, R3, light-emitting diode component；The input of NOT gate is the input of circuit block, the input of the output end of NOT gate and the 1st conductive gate, the input connection of 2nd conductive gate, the output end of 1st conductive gate and R2 one end are connected, the R2 other end and C2 one end, C1 one end connection, the output end of 2nd conductive gate and R1 one end are connected, the R1 other end and the C2 other end, C3 one end, Q1 base stage connection, Q1 emitter stage and Q2 base stage are connected, Q2 emitter stage, R3 one end, the C1 other end, Q1 colelctor electrode, Q2 colelctor electrode, the input of light-emitting diode component is connected with power supply VCC, the C3 other end, the R3 other end, the output end of light-emitting diode component connects ground.

Wherein, controller circuitry includes singlechip microcontroller chip U2, resistance R21, electric capacity C21, C22, C23, C24, crystal oscillator Y21, light touch type button SW21；U2 model STC12C5A60S2, U2 the 21st pin to the 28th pin connects the 1st piece of circuit block to the input of the 8th piece of circuit block respectively, U2 the 32nd pin to the 39th pin connects the 9th piece of circuit block to the input of the 16th piece of circuit block respectively, Y21 is connected between U2 the 18th pin and the 19th pin, C21 one end connects U2 the 18th pin, C22 one end connects U2 the 19th pin, C23 one end connection power supply VCC, the C23 other end connects U2 the 9th pin, SW21 two ends connect C23 two ends respectively, R21 one end connects U2 the 9th pin, C24 one end connection power supply VCC, U2 the 20th pin, the C21 other end, the C22 other end, the C24 other end, the R21 other end is grounded.

Wherein, serial communication circuit includes electrical level transferring chip U1, serial ports male plug J41, electric capacity C41, C42, C43, C44, C45；U1 model MAX232CPE, J41 the 2nd pin and U1 the 14th pin are connected, J41 the 3rd pin and U1 the 13rd pin are connected, U1 the 12nd pin and U2 the 10th pin are connected, U1 the 11st pin and U2 the 11st pin are connected, C41 one end and U1 the 15th pin are connected, the C41 other end is connected with power supply VCC, C42 one end and U1 the 2nd pin are connected, the C42 other end is connected with power supply VCC, C45 one end and U1 the 6th pin are connected, C45 other end ground connection, C43 is connected between U1 the 1st pin and U1 the 3rd pin, C44 is connected between U1 the 4th pin and U1 the 5th pin.

Wherein, light-emitting diode component includes at least 2 groups circuit of LED, every group of circuit of LED includes a light emitting diode and a resistance, the negative pole of the light emitting diode and the output end of light-emitting diode component are connected, the positive pole of light emitting diode is connected with one end of the resistance, and the other end of the resistance and the input of light-emitting diode component are connected.

Wherein, light-emitting diode component includes 8 groups, 16 groups or 32 groups circuit of LED.

Wherein, inner ring light source is annular in shape, and 8 brilliance control regions of inner ring light source are uniformly distributed, and outer shroud light source is annular in shape, and 8 brilliance control regions of outer shroud light source are uniformly distributed.

Wherein, in addition to power supply stabilization circuit, the power input of power supply stabilization circuit and serial communication circuit, the power input of controller circuitry, the power input of LED drive circuit are connected.

Wherein, power supply stabilization circuit includes voltage stabilizing chip U3, electric capacity C11, C12, C13, C14；U3 model L7805CV, C11 one end, C12 one end ,+12V power supplys and U3 the 1st pin are connected, C13 one end, C14 one end, power supply VCC and U3 the 3rd pin connection, the C11 other end, the C12 other end, the C13 other end, the C14 other end, U3 the 2nd pin are grounded.

A kind of a kind of above-mentioned automatic optical detecting system of two grades of automatic optics inspection light sources of application.

Beneficial effect of the present invention：

Two grades of automatic optics inspection light sources of one kind of the present invention, include controller circuitry, the LED drive circuit of the electric current of the serial communication circuit for the work of drive control device circuit, the circuit block for controlling LED drive circuit；The output end of serial communication circuit and the input of controller circuitry are connected, and the output end of serial communication circuit and the input of LED drive circuit are connected；8 pieces of circuit blocks that LED drive circuit is included in 16 pieces of circuit blocks, 16 pieces of circuit blocks constitute inner ring light source, and inner ring light source is divided into 8 brilliance control regions, 1 brilliance control region of every piece of circuit block correspondence；Other 8 pieces of circuit blocks in 16 pieces of circuit blocks constitute outer shroud light source, and outer shroud light source is divided into 8 brilliance control regions, 1 brilliance control region of every piece of circuit block correspondence.Controller circuitry can control the electric current of 16 pieces of circuit blocks, control every piece of circuit block brightness of illumination, produce the controllable brilliance control region of 16 brightness of illuminations, the present invention can be by controlling the brightness in 16 brilliance control regions to protrude the defect part of product to be measured, without mobile high-precision X-Y platform, so as to improve detection accuracy, detection efficiency is improved.

Further, circuit block of the invention proposes a kind of D/AC change-over circuits of the anti-phase offset type of innovation；After PWM square waves are negated by NOT gate, obtain two PWM square-wave signals, the two PWM square-wave signals are respectively through a conductive gate, obtain the just anti-phase PWM square-wave signals of two electrical characteristic identicals, then alternating component is largely balanced out by Capacitance Coupled, the direct current signal relatively stablized；Its filter effect preferably, is used in combination suitable for multichannel.

The automatic optical detecting system of the present invention includes two grades of automatic optics inspection light sources, two grades of automatic optics inspection light sources can be by controlling the brightness in 16 brilliance control regions to protrude the defect part of product to be measured, without mobile high-precision X-Y platform, so as to improve detection accuracy, detection efficiency is improved.

Brief description of the drawings

Fig. 1 is the block diagram of two grades of automatic optics inspection light sources of the present invention.

Fig. 2 is the inner ring light source of the present invention and the horizontal projection of outer shroud light source.

Fig. 3 is the circuit diagram of two grades of automatic optics inspection light sources of the present invention.

The schematic diagram that Fig. 4 produces for the current signal of the circuit block of the present invention.

Fig. 5 is Fig. 4 alternating current equivalent figure.

Embodiment

Referring to Fig. 1 to Fig. 5, the present invention is described in detail below in conjunction with accompanying drawing.

A kind of two grades of automatic optics inspection light sources, include controller circuitry 2, the LED drive circuit 3 of the electric current of the serial communication circuit 4 for the work of drive control device circuit 2, the circuit block for controlling LED drive circuit 3；The output end of serial communication circuit 4 is connected with the input of controller circuitry 2, and the output end of serial communication circuit 4 is connected with the input of LED drive circuit 3；8 pieces of circuit blocks that LED drive circuit 3 is included in 16 pieces of circuit blocks, 16 pieces of circuit blocks constitute inner ring light source, and inner ring light source is divided into 8 brilliance control regions, 1 brilliance control region of every piece of circuit block correspondence；Other 8 pieces of circuit blocks in 16 pieces of circuit blocks constitute outer shroud light source, and outer shroud light source is divided into 8 brilliance control regions, 1 brilliance control region of every piece of circuit block correspondence.

Controller circuitry 2 can control the electric current of 16 pieces of circuit blocks, control the brightness of illumination of every piece of circuit block, the controllable brilliance control region of 16 brightness of illuminations be produced, so as to provide more careful Lighting control；When to protrude defect part (or product to be measured needs the intermediate portions of prominent detection) of product to be measured, by controlling, some brilliance control regions are partially bright, some brilliance control regions are partially dark or do not work, the quick positioning for carrying out rejected region, the image for making video camera obtain the protrusion defect part for meeting contrast requirement is adjusted by light, for subsequent analysis.The present invention, without mobile high-precision X-Y platform, so as to improve detection accuracy, can improve detection efficiency by controlling the brightness in 16 brilliance control regions to protrude the defect part of product to be measured.

Referring to Fig. 2, n1 is inner ring light source, and n3 is outer shroud light source, and n2 is lamp socket skeleton, and inner ring light source and outer shroud light source are arranged at lamp socket skeleton, and dotted line frame N show the vertical cross section of lamp socket, and dotted line frame M show the horizontal projection of inner ring light source and outer shroud light source.Inner ring light source is used to provide vertical illumination, and outer shroud light source is used to provide horizontal illuminance.Inner ring light source is divided into 8 brilliance control regions, B1 is produced respectively to B7 illumination regions, outer shroud light source is divided into 8 brilliance control regions, and A1 is produced respectively to A7 illumination regions.This total of 16 brilliance control region of two grades of automatic optics inspection light sources, corresponds respectively to 16 pieces of circuit blocks.

In the present embodiment, inner ring light source is annular in shape, and 8 brilliance control regions of inner ring light source are uniformly distributed, and outer shroud light source is annular in shape, and 8 brilliance control regions of outer shroud light source are uniformly distributed.

In the present embodiment, the circuit structure of 16 pieces of circuit blocks is identical, and their circuit diagram is identical.It is succinct for circuit diagram referring to Fig. 3, the circuit diagram of the 1st piece of circuit block is only depicted in Fig. 3.Every piece of circuit block includes NOT gate, the 1st conductive gate, the 2nd conductive gate, triode Q1, Q2 of NPN type, resistance R1, R2, R3, light-emitting diode component；The input of NOT gate is the input of circuit block, the input of the output end of NOT gate and the 1st conductive gate, the input connection of 2nd conductive gate, the output end of 1st conductive gate and R2 one end are connected, the R2 other end and C2 one end, C1 one end connection, the output end of 2nd conductive gate and R1 one end are connected, the R1 other end and the C2 other end, C3 one end, Q1 base stage connection, Q1 emitter stage and Q2 base stage are connected, Q2 emitter stage, R3 one end, the C1 other end, Q1 colelctor electrode, Q2 colelctor electrode, the input of light-emitting diode component is connected with power supply VCC, the C3 other end, the R3 other end, the output end of light-emitting diode component connects ground.This circuit block proposes a kind of D/AC change-over circuits of the anti-phase offset type of innovation；After PWM square waves are negated by NOT gate, obtain two PWM square-wave signals, the two PWM square-wave signals are respectively through a conductive gate, obtain the just anti-phase PWM square-wave signals of two electrical characteristic identicals, then alternating component is largely balanced out by Capacitance Coupled, the direct current signal relatively stablized；Its filter effect preferably, is used in combination suitable for multichannel.

Wherein, NOT gate A is a NOT gate of NOT gate digit chip 4069,2nd conductive gate B, the 1st conductive gate C are latch 7,4HC,573 two conductive gates, R1, R2 are 2K fixed carbon resisters, R3 is 10K fixed carbon resisters, and C1, C3 are 10U electrochemical capacitors, and C2 is 100U electrochemical capacitors, Q1 model NPN triode 9014, Q2 model NPN triode 2SD882.It is, of course, also possible to produce NOT gate and conductive gate using other chips, this is common knowledge, be will not be described here.

In the present embodiment, light-emitting diode component includes at least 2 groups circuit of LED, every group of circuit of LED includes a light emitting diode (LED) and a resistance, the negative pole of the light emitting diode and the output end of light-emitting diode component are connected, the positive pole of light emitting diode is connected with one end of the resistance, and the other end of the resistance and the input of light-emitting diode component are connected.Referring to Fig. 3, there is n group circuit of LED in figure.Wherein, R51 to R5n is 200 Europe fixed carbon resisters, and D51 to D5n is white light-emitting diode.Light-emitting diode component can include 8 groups, 16 groups or 32 groups circuit of LED.Certain light-emitting diode component can also be other quantity；Depending on the quantity of light-emitting diode component can be according to actual conditions.Light-emitting diode component is Common Component, by external power source it can be driven to light, and diode circuit can also be that a resistance and the LED strip of 2 or more than 2 join, and those of ordinary skill in the art can adjust the LED of the technical program quantity according to environmental requirement.

In the present embodiment, controller circuitry 2 includes singlechip microcontroller chip U2, resistance R21, electric capacity C21, C22, C23, C24, crystal oscillator Y21, light touch type button SW21；U2 model STC12C5A60S2, U2 the 21st pin to the 28th pin connects the 1st piece of circuit block to the input of the 8th piece of circuit block respectively, U2 the 32nd pin to the 39th pin connects the 9th piece of circuit block to the input of the 16th piece of circuit block respectively, Y21 is connected between U2 the 18th pin and the 19th pin, C21 one end connects U2 the 18th pin, C22 one end connects U2 the 19th pin, C23 one end connection power supply VCC, the C23 other end connects U2 the 9th pin, SW21 two ends connect C23 two ends respectively, R21 one end connects U2 the 9th pin, C24 one end connection power supply VCC, U2 the 20th pin, the C21 other end, the C22 other end, the C24 other end, the R21 other end is grounded.Model STC12C5A60S2 U2 can produce 16 road pwm signals of the electric current for controlling 16 pieces of circuit blocks, the chip that pwm signal can be produced is a lot, certainly, the present invention can use other similar functional chips that can produce pwm signal to replace STC12C5A60S2, the chip application of this kind of function is extensive, product is various, will not be described here.

Wherein, C21, C22 are 30P ceramic disc capacitors, and C23 is 10U electrochemical capacitors, and C24 is 104 ceramic disc capacitors, and R21 is 10K fixed carbon resisters, and Y21 is 24MHz crystal oscillators.

In the present embodiment, serial communication circuit 4 includes electrical level transferring chip U1, serial ports male plug J41, electric capacity C41, C42, C43, C44, C45；U1 model MAX232CPE, J41 the 2nd pin and U1 the 14th pin are connected, J41 the 3rd pin and U1 the 13rd pin are connected, U1 the 12nd pin and U2 the 10th pin are connected, U1 the 11st pin and U2 the 11st pin are connected, C41 one end and U1 the 15th pin are connected, the C41 other end is connected with power supply VCC, C42 one end and U1 the 2nd pin are connected, the C42 other end is connected with power supply VCC, C45 one end and U1 the 6th pin are connected, C45 other end ground connection, C43 is connected between U1 the 1st pin and U1 the 3rd pin, C44 is connected between U1 the 4th pin and U1 the 5th pin.Serial communication circuit 4 works there is provided the mutual conversion of Transistor-Transistor Logic level signal and RS-232 agreement level signals for drive control device circuit 2, allows drive control device circuit 2 to receive the serial communication connection of RS-232 agreements.The present invention sends commands to single-chip microcomputer by serial ports, and to control 16 illumination regions, this control method had not only facilitated but also inexpensive so that the present invention is simple in construction, and cost is relatively low, with preferable market prospects.

Wherein, C41 is 10U electrochemical capacitors, and C42, C43, C44, C45 are 104 ceramic disc capacitors, and the J42 in Fig. 3 is the socket of switching.

In the present embodiment, in addition to power supply stabilization circuit 1, power supply stabilization circuit 1 is connected with the power input of the power input, the power input of controller circuitry 2, LED drive circuit 3 of serial communication circuit 4.The effect of power supply stabilization circuit 1 is that stable 5V power supplys are provided to whole two grades of automatic optics inspection light sources.

In the present embodiment, power supply stabilization circuit 1 includes voltage stabilizing chip U3, electric capacity C11, C12, C13, C14；U3 model L7805CV, C11 one end, C12 one end ,+12V power supplys and U3 the 1st pin are connected, C13 one end, C14 one end, power supply VCC and U3 the 3rd pin connection, the C11 other end, the C12 other end, the C13 other end, the C14 other end, U3 the 2nd pin are grounded.Wherein, C11, C14 are 100U electrochemical capacitors, and C12, C13 are 104 ceramic disc capacitors.Except L7805CV chips, the present invention can also can produce the chip and its peripheral circuit of 5V power supplys using other.

It should be noted that the model and parameter value of the present embodiment component can modify according to actual application environment, the modification that those skilled in the art are carried out in the case of creative work is not needed to the present invention belongs to the scope of protection of the invention.

The U2 of controller circuitry 2 draws 16 pieces of circuit blocks that 16 pwm signal lines connect LED drive circuit 3 respectively, and PWM square-wave signals are obtained by procedure simulation.When to change the brightness in some brilliance control region, serial communication circuit 4 sends format command, U2 changes the dutycycle of PWM square-wave signals according to order, and the corresponding circuit block of PWM square-wave signals changes the size of electric current according to PWM square-wave signals, so as to realize the brightness for changing brilliance control region.

Referring to Fig. 4 Fig. 5, after the PWM square waves of circuit block INPUT ends input are negated by NOT gate, two PWM square-wave signals are obtained, the two PWM square-wave signals obtain the just anti-phase PWM square-wave signals of two electrical characteristic identicals respectively through a conductive gate；Then alternating component is largely balanced out by Capacitance Coupled, the direct current signal relatively stablized is exported from OUTPUT ends；Eventually pass after low-power transistor 9014 and middle pliotron the 2DS882 Darlington transistor constituted make voltage follow amplification, drive light-emitting diode component.

Analysis below Fig. 5 alternating current equivalent figure.

Here PWM square waves are the adjustable square wave of dutycycle, and when designing PWM low-pass network, PWM square waves have a special feature, here it is square wave can be considered as analog signal, can also be considered as data signal.And data signal has that an operation is more easier than analog signal to be realized, here it is " negating " in " paraphase ", that is, digital circuit.According to the theory of Fourier, periodic signal can be considered as being made up of several sinusoidal signals and a DC component, and this several sinusoidal signal constitutes the alternating component of the signal, to realize the A/DC conversions of PWM square waves, just be intended to method and remove these sinusoidal signals.Numeral square wave of the inverted, the sinusoidal signal decomposited is just mirrored into relation with the sinusoidal signal decomposited before negating, 180 ° of phase shift is just equivalent to for sinusoidal signal, the change of namely digital its all sinusoidal signal component decomposited of square wave of the inverted, which is equivalent to, there occurs 180 ° of phase shift, and its size is constant.This explanation numeral negate after, the frequency spectrum of square wave there occurs 180 ° of phase shift, if numeral negate before and after square wave be superimposed, over the frequency domain it can be seen that, as a result can be 0.

Fig. 5 only considers alternating voltage component, and u2 is the alternating component of Fig. 4 NOT gate A output voltages, and u1 is the alternating component of Fig. 4 conductive gates B (the second conductive gate) output voltage.U3 is Fig. 4 " OUTPUT ends " alternating component, excess vol when u4 is analysis.

Fig. 5 is analyzed, u2 is u1 reversed phase signal, if u2 amplitude is A times of u1, then u2=-A*u1 (this is the assignment for the ease of derivation).

Applied voltage u31s of the u1 in Figure 5 at P3 be：

$U31=\frac{Z_5//({\mathrm{<figure-callout\; id="3"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_3+Z_4)}{{\mathrm{<figure-callout\; id="1"\; label="Z"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">Z</figure-callout>}}_1+Z_5//({\mathrm{<figure-callout\; id="3"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_3+Z_4)}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1=\frac{Z_3{Z}_5+Z_4{Z}_5}{Z_1{\mathrm{<figure-callout\; id="3"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_3+Z_1{\mathrm{<figure-callout\; id="4"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_4+Z_1{Z}_5+Z_3{Z}_5+Z_4{Z}_5}\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$ ... 1 formula

Applied voltage u4s of the u2 in Figure 5 at P4 be：

$U4=\frac{{\mathrm{<figure-callout\; id="3"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_3//(Z_5+Z_4)}{{\mathrm{<figure-callout\; id="2"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_2+{\mathrm{<figure-callout\; id="3"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_3//(Z_5+Z_4)}*\mathrm{<figure-callout\; id="2"\; label="U"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">U</figure-callout>}2$

Applied voltage u32s of the u2 in Figure 5 at P3 be：

$U32=\frac{Z_5}{Z_5+{\mathrm{<figure-callout\; id="4"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_4}*\mathrm{<figure-callout\; id="4"\; label="U"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">U</figure-callout>}4=\frac{Z_5}{Z_5+{\mathrm{<figure-callout\; id="4"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_4}*\frac{{\mathrm{<figure-callout\; id="3"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_3//(Z_5+Z_4)}{{\mathrm{<figure-callout\; id="2"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_2+{\mathrm{<figure-callout\; id="3"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_3//(Z_5+Z_4)}*\mathrm{<figure-callout\; id="2"\; label="U"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">U</figure-callout>}2=\frac{Z_3{Z}_5}{Z_2{\mathrm{<figure-callout\; id="3"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_3+Z_2{\mathrm{<figure-callout\; id="4"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_4+Z_2{Z}_5+Z_3{Z}_5+Z_3{\mathrm{<figure-callout\; id="4"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_4}*\mathrm{<figure-callout\; id="2"\; label="U"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">U</figure-callout>}2$

Because u2=-A*u1,

$U32=\frac{Z_3{Z}_5}{Z_2{\mathrm{<figure-callout\; id="3"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_3+Z_2{\mathrm{<figure-callout\; id="4"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_4+Z_2{Z}_5+Z_3{Z}_5+Z_3{\mathrm{<figure-callout\; id="4"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_4}*\mathrm{<figure-callout\; id="2"\; label="U"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">U</figure-callout>}2=-A*\frac{Z_3{Z}_5}{Z_2{\mathrm{<figure-callout\; id="3"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_3+Z_2{\mathrm{<figure-callout\; id="4"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_4+Z_2{Z}_5+Z_3{Z}_5+Z_3{\mathrm{<figure-callout\; id="4"\; label="Z"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">Z</figure-callout>}}_4}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$ ... 2 formulas

By Z₁=R₁, Z₂=R₂,

1,2 formulas are substituted into obtain：

$=\frac{\frac{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1}{C_1{C}_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3}}{\mathrm{j\&omega;}{R}_1\frac{(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}{C_1{C}_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3}+\frac{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1}{C_1{C}_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3}}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1=\frac{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1}{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+\mathrm{j\&omega;}{R}_1(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$

$=\frac{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}^2-\mathrm{j\&omega;}{R}_1({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}^2+{\mathrm{\&omega;}}^2{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1}^2{(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}^2}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$

$=-A*\frac{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2}{\mathrm{j\&omega;}{R}_2(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)+{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1=-A*\frac{C_2({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_3)-\mathrm{j\&omega;}{C}_2{R}_2(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_3)}^2+{\mathrm{\&omega;}}^2{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}^2{(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}^2}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$

U3 is obtained after u31 and u32 superpositions：

$\mathrm{<figure-callout\; id="3"\; label="U"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">U</figure-callout>}3=\mathrm{<figure-callout\; id="31"\; label="U"\; filenames="HSA00000402461600021.png"\; state="\{\{state\}\}">U</figure-callout>}31+\mathrm{<figure-callout\; id="32"\; label="U"\; filenames="HSA00000402461600012.png,HSA00000402461600021.png"\; state="\{\{state\}\}">U</figure-callout>}32$

$=\frac{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}^2-\mathrm{j\&omega;}{R}_1({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}^2+{\mathrm{\&omega;}}^2{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1}^2{(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}^2}*U1-A*\frac{C_2({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_3)-\mathrm{j\&omega;}{C}_2{R}_2(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_3)}^2+{\mathrm{\&omega;}}^2{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}^2{(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}^2}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$ ... 3 formulas

U3 is the alternating component of " output direct current ", and the purpose of derivation is to make u3 small by even 0 as best one can, and C1=C3, R1=R2 are worked as in the place for having a coincidence in formula, during A=(C3+C2)/C2, and u3 is equal to 0.

Work as C1=C3, R1=R2, during A=(C3+C2)/C2, in 3 formulas：

(C₂+C₁)²+ω²R₁ ²(C₂C₃+C₁C₃+C₁C₂)²=(C₂+C₃)²+ω₂R₂ ²(C₂C₃+C₁C₃+C₁C₂)²

(C₂+C₁)²=AC₂(C₂+C₃), j ω R₁(C₂+C₁)(C₂C₃+C₁C₃+C₁C₂)=jA ω C₂R₂(C₂C₃+C₁C₃+C₁C₂)

Then u3=0.

C1=C3 in Fig. 5 circuit, R1=R2, because A=to be realized (C3+C2)/C2 has certain expense, so, during design circuit, for simplicity, ignore this condition of A=(C3+C2)/C2, A=1, that is, NOT gate A and conductive gate B constant amplitudes are allowed, below to the further analysis of circuit：

C3=C1, R1=R2 are substituted into 3 formulas and obtained：

$\mathrm{<figure-callout\; id="3"\; label="U"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">U</figure-callout>}3=\frac{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}^2-\mathrm{j\&omega;}{R}_1({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}^2+{\mathrm{\&omega;}}^2{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1}^2{(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}^2}*U1-A*\frac{C_2({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_3)-\mathrm{j\&omega;}{C}_2{R}_2(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_3)}^2+{\mathrm{\&omega;}}^2{{\mathrm{<figure-callout\; id="2"\; label="R"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">R</figure-callout>}}_2}^2{(C_2{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{\mathrm{<figure-callout\; id="3"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_3+C_1{C}_2)}^2}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$

$=\frac{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}^2-\mathrm{j\&omega;}{R}_1({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)(C_2{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+C_1{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+C_1{C}_2)}{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}^2+{\mathrm{\&omega;}}^2{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1}^2{(C_2{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+C_1{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+C_1{C}_2)}^2}*U1-A*\frac{C_2({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)-\mathrm{j\&omega;}{C}_2{R}_1(C_2{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+C_1{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+C_1{C}_2)}{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}^2+{\mathrm{\&omega;}}^2{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1}^2{(C_2{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+C_1{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1+C_1{C}_2)}^2}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$

$=\frac{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)[({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)-\mathrm{j\&omega;}{R}_1(2C_1{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}^2)]}{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}^2+{\mathrm{\&omega;}}^2{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1}^2{({2C}_1{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}^2)}^2}*U1-A*\frac{C_2[({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)-\mathrm{j\&omega;}{R}_1(2C_1{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}^2)]}{{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}^2+{\mathrm{\&omega;}}^2{{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1}^2{({2C}_1{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}^2)}^2}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$

$=\frac{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)}{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)+\mathrm{j\&omega;}{R}_1({2C}_1{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}^2)}*U1-A*\frac{C_2}{({\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1)+\mathrm{j\&omega;}{R}_1(2C_1{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}^2)}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$

$=\frac{1}{1+\mathrm{j\&omega;}{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1\frac{{2C}_1{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}^2}{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}}*U1-A*\frac{C_2}{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}*\frac{1}{1+\mathrm{j\&omega;}{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1\frac{2C_1{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}^2}{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$

$=(1-A*\frac{C_2}{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1})*\frac{1}{1+\mathrm{j\&omega;}{\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">R</figure-callout>}}_1\frac{2C_1{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}^2}{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$

$=(1-A*\frac{C_2}{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1})*\frac{1}{1+\mathrm{j\&omega;}{R}_1{C}_n}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$ ... ... 4 formulas

Will in 4 formulas

It is equivalent into C_n。

From 4 formulas can be seen that formula in addition to input signal u1, by

With

Two item compositions,It is single order RC filter actions, and

The effect exactly offset.Because

C₂＞ 0, then

So C₁＜ C_n＜ 2C₁, it is clear that C₂Increase to C_nThere is no much contributions, and C₁Increase to C_nContribution it is larger, this explanation C₁And C₂It is right

There are positive contribution, wherein C₁Play a major role, C₂Effect is little, then this circuit single order RC filter actions are main by C₁And R₁Control.

It can be seen that, circuit is many

The single order RC filter circuits of item, then after first-order filtering, then pass through

This decay, as A=(C3+C2)/C2,Here it is when the effect offset is maximum, this effect offset, furthermore it is also possible to when finding out that A takes definite value, C₂Increasing has positive contribution to the effect of counteracting, and C₁Increasing the effect to counteracting has negative contribution, then the effect of the counteracting of circuit is in addition to A, by C₁And C₂Co- controlling, C₂/C₁Bigger, negative function is stronger.

Ignore A=(C3+C2)/C2 when designing circuit, when allowing NOT gate A as the amplitude that conductive gate B is exported, then A=1.

$\mathrm{<figure-callout\; id="3"\; label="U"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">U</figure-callout>}3=(1-\frac{C_2}{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HSA00000402461600011.png,HSA00000402461600021.png"\; state="\{\{state\}\}">C</figure-callout>}}_2+C_1})*\frac{1}{1+\mathrm{j\&omega;}{R}_1{C}_n}*\mathrm{<figure-callout\; id="1"\; label="U"\; filenames="HSA00000402461600011.png"\; state="\{\{state\}\}">U</figure-callout>}1$

Even if

But work as

When less, because

Unrelated with ω, this circuit will not weaken to the weakening effect of low frequency signal.Equally it is single order RC filter circuits, this circuit is stronger than no negative function to the weakening effect of low frequency signal.

But because the network is connected after non-linear element gate, the impedance that gate is introduced can make negative function excessively into first-order filtering effect, in order to weaken the influence that gate access is brought, at this moment need R1, R2, C1, C3 increase in figure, the signal for exporting two gates (NOT gate A and conductive gate B) flows into other side less, so as to maintain 4 formulas.

A kind of automatic optical detecting system of the above-mentioned two grades of automatic optics inspection light sources of application；The automatic optical detecting system includes two grades of automatic optics inspection light sources, two grades of automatic optics inspection light sources can be by controlling the brightness in 16 brilliance control regions to protrude the defect part of product to be measured, without mobile high-precision X-Y platform, so as to improve detection accuracy, detection efficiency is improved.

Above content is only presently preferred embodiments of the present invention, for one of ordinary skill in the art, according to the thought of the present invention, be will change in specific embodiments and applications, this specification content should not be construed as limiting the invention.

Claims (10)

1. a kind of two grades of automatic optics inspection light sources, it is characterised in that：Including serial communication circuit, controller circuitry, the LED drive circuit of the electric current of circuit block for controlling LED drive circuit worked for drive control device circuit；The output end of serial communication circuit and the input of controller circuitry are connected, and the output end of serial communication circuit and the input of LED drive circuit are connected；8 pieces of circuit blocks that LED drive circuit is included in 16 pieces of circuit blocks, 16 pieces of circuit blocks constitute inner ring light source, and inner ring light source is divided into 8 brilliance control regions, 1 brilliance control region of every piece of circuit block correspondence；Other 8 pieces of circuit blocks in 16 pieces of circuit blocks constitute outer shroud light source, and outer shroud light source is divided into 8 brilliance control regions, 1 brilliance control region of every piece of circuit block correspondence.

2. a kind of two grades of automatic optics inspection light sources according to claim 1, it is characterised in that：Every piece of circuit block includes NOT gate, the 1st conductive gate, the 2nd conductive gate, triode Q1, Q2 of NPN type, resistance R1, R2, R3, light-emitting diode component；The input of NOT gate is the input of circuit block, the input of the output end of NOT gate and the 1st conductive gate, the input connection of 2nd conductive gate, the output end of 1st conductive gate and R2 one end are connected, the R2 other end and C2 one end, C1 one end connection, the output end of 2nd conductive gate and R1 one end are connected, the R1 other end and the C2 other end, C3 one end, Q1 base stage connection, Q1 emitter stage and Q2 base stage are connected, Q2 emitter stage, R3 one end, the C1 other end, Q1 colelctor electrode, Q2 colelctor electrode, the input of light-emitting diode component is connected with power supply VCC, the C3 other end, the R3 other end, the output end of light-emitting diode component connects ground.

3. a kind of two grades of automatic optics inspection light sources according to claim 2, it is characterised in that：The controller circuitry includes singlechip microcontroller chip U2, resistance R21, electric capacity C21, C22, C23, C24, crystal oscillator Y21, light touch type button SW21；U2 model STC12C5A60S2, U2 the 21st pin to the 28th pin connects the 1st piece of circuit block to the input of the 8th piece of circuit block respectively, U2 the 32nd pin to the 39th pin connects the 9th piece of circuit block to the input of the 16th piece of circuit block respectively, Y21 is connected between U2 the 18th pin and the 19th pin, C21 one end connects U2 the 18th pin, C22 one end connects U2 the 19th pin, C23 one end connection power supply VCC, the C23 other end connects U2 the 9th pin, SW21 two ends connect C23 two ends respectively, R21 one end connects U2 the 9th pin, C24 one end connection power supply VCC, U2 the 20th pin, the C21 other end, the C22 other end, the C24 other end, the R21 other end is grounded.

4. a kind of two grades of automatic optics inspection light sources according to claim 3, it is characterised in that：The serial communication circuit includes electrical level transferring chip U1, serial ports male plug J41, electric capacity C41, C42, C43, C44, C45；U1 model MAX232CPE, J41 the 2nd pin and U1 the 14th pin are connected, J41 the 3rd pin and U1 the 13rd pin are connected, U1 the 12nd pin and U2 the 10th pin are connected, U1 the 11st pin and U2 the 11st pin are connected, C41 one end and U1 the 15th pin are connected, the C41 other end is connected with power supply VCC, C42 one end and U1 the 2nd pin are connected, the C42 other end is connected with power supply VCC, C45 one end and U1 the 6th pin are connected, C45 other end ground connection, C43 is connected between U1 the 1st pin and U1 the 3rd pin, C44 is connected between U1 the 4th pin and U1 the 5th pin.

5. a kind of two grades of automatic optics inspection light sources according to claim 2, it is characterised in that：The light-emitting diode component includes at least 2 groups circuit of LED, every group of circuit of LED includes a light emitting diode and a resistance, the negative pole of the light emitting diode and the output end of light-emitting diode component are connected, the positive pole of light emitting diode is connected with one end of the resistance, and the other end of the resistance and the input of light-emitting diode component are connected.

6. a kind of two grades of automatic optics inspection light sources according to claim 5, it is characterised in that：The light-emitting diode component includes 8 groups, 16 groups or 32 groups circuit of LED.

7. a kind of two grades of automatic optics inspection light sources according to claim 1, it is characterised in that：The inner ring light source is annular in shape, and 8 brilliance control regions of inner ring light source are uniformly distributed, and the outer shroud light source is annular in shape, and 8 brilliance control regions of outer shroud light source are uniformly distributed.

8. a kind of two grades of automatic optics inspection light sources according to claim 1, it is characterised in that：Also including power supply stabilization circuit, power input, the power input of controller circuitry, the power input of LED drive circuit of power supply stabilization circuit and serial communication circuit are connected.

9. a kind of two grades of automatic optics inspection light sources according to claim 8, it is characterised in that：The power supply stabilization circuit includes voltage stabilizing chip U3, electric capacity C11, C12, C13, C14；U3 model L7805CV, C11 one end, C12 one end ,+12V power supplys and U3 the 1st pin are connected, C13 one end, C14 one end, power supply VCC and U3 the 3rd pin connection, the C11 other end, the C12 other end, the C13 other end, the C14 other end, U3 the 2nd pin are grounded.

10. a kind of a kind of automatic optical detecting system of two grades of automatic optics inspection light sources described in application claim 1 to 9 any one.

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