CN2035490U - Clip type pocket logic indicator - Google Patents
Clip type pocket logic indicator Download PDFInfo
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- CN2035490U CN2035490U CN 88211707 CN88211707U CN2035490U CN 2035490 U CN2035490 U CN 2035490U CN 88211707 CN88211707 CN 88211707 CN 88211707 U CN88211707 U CN 88211707U CN 2035490 U CN2035490 U CN 2035490U
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- circuit
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- folder
- logic
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Abstract
The utility model relates to a semiconductor electronic testing tool which can test a dual in-line type digital logic integrated circuit on line and display the logic state of each pin end of the measured integrated circuit. The semiconductor electronic testing tool is composed of a clip type outer shell, a T-shaped frame, a V-shaped spring and a printed circuit mounting plate which is welded with contact pins, a power supply circuit, a threshold value circuit, a threshold value test circuit and a luminous display circuit. The utility model can obtain a power source from the measured integrated block between two optional contact pins, can test TTL, HTL, DTL, CMOS and NMOS circuits, and can test a level transducer and a high-voltage driver by an auxiliary power source.
Description
The utility model is a kind of semiconductor electronic testing tool, and a kind of online detection dual inline type Digital Logic integrated circuit of more specifically saying so shows the pocket logic eye of folder formula of each leads ends logic state of tested integrated circuit.
Existing technology as No. 86203080 patents of China, has been introduced a kind of logic viewer that detects the dual inline type digital integrated circuit.It constitutes threshold detection circuit by the logical inversion impact damper, is aided with mu balanced circuit and external power supply again, and decapacitation detects outside the general TTLCMOS and HTL class device, can also detect level translator and high-voltage drive class integrated package; When the number of pins of the detection terminal number of logic viewer and tested integrated package is not inconsistent, also can detect; And move automatically and obtain power supply from tested integrated circuit, still because the restriction that this patent circuit itself designs, accomplish above said be not all right.This is because the threshold value of various integrated circuit is relevant with supply voltage, and it is with threshold value stuck-at-.5V～2.4V, this value only is suitable for TTL class circuit, and if cmos circuit is powered with 10V or the power supply more than the 10V, this threshold value does not gear to actual circumstances so; And if be used on the logic translator, TTL-CMOS converter for example, " 1 " that its shows is " 1 " of TTL or " 1 " of CMOS on earth, how level conversion is unknowable if getting.In addition, when its logic " O " and " unsettled ", light emitting diode does not all work, and this obviously is not right.
Task of the present utility model is, a kind of logic eye is provided, and it can online detection also can obtain power supply energy from tested integrated circuit between own any two contact pilotages.Also has the accessory power supply socket.The logic state that when detecting, can correctly show TTL, HTL, CMOS and each leads ends of NMOS dual-in-line Digital Logic integrated circuit.Its threshold voltage is relevant with the operating voltage of tested integrated circuit, and is variable.And can detect level translator and high-voltage drive adhesive integrated circuit easily.
The characteristics that solve the technical scheme of above-mentioned task are: have on two folder formula shell (16) shells stylus recess (22) and contact pilotage backstop muscle (25) are arranged, they rely on bearing pin (19) and the pin-and-hole (21) on the pin-and-hole seat (20) on the closure plate (18) to form clip.In the inner chamber of clip, a T type skeleton (17) is arranged, on two faces of T type skeleton main body, by two rivets a printed wire installing plate (31) is housed respectively, respectively there is a little groove (23) both sides in T type skeleton main body, in order to V-type spring (26) to be installed, two elongated slots (24) and accessory power supply input socket (14) are arranged on the end face of T type skeleton, elongated slot is used to manifest light emitting diode (10).On said every bar printing circuit installing plate (31), be welded with some contact pilotages (1), power circuit (5), threshold dector (3), threshold setting circuit (2), luminous display circuit (4).The sum of contact pilotage equates that with the fan-in factor of the pocket logic eye of folder formula they fitly are through in the stylus recess of two folder formula shells, and links to each other by the in-phase input end of the printed wire on the installing plate with power circuit and threshold dector.The cutter end of the switch (9) in the inverting input of threshold dector and the threshold setting circuit links to each other, and the output terminal of threshold dector links to each other with an end of luminous display circuit, and the other end of luminous display circuit links to each other with the negative pole of power circuit.Said contact pilotage is made by conducting electricity good and having certain flexible material; Said threshold dector is served as by voltage comparator or operational amplifier; Said threshold setting circuit is a resistor voltage divider circuit, and it is attempted by on the power supply by 3 fixed resistance (6), (7), (8) or the fixed resistance series connection more than 3.Receive switch (9) from tap between (6) and (7) and between (7) and (8) again, be sent to threshold dector by the cutter end then, realized that threshold value is variable.(also can only threshold value be fixed on the supply voltage value of X%) with two fixed resistance, and this threshold value is relevant with the operating voltage of tested integrated circuit.Because every contact pilotage (1) all with power circuit in the negative pole of diode (12), the positive pole of diode (29) links to each other, and the negative pole of the positive pole of diode (12) and diode (29) connects the negative pole and the positive pole of capacitor respectively, thereby has realized can obtaining power supply from tested integrated circuit between any two contact pilotages; Owing to used accessory power supply input socket (14) and diode (15) in the power circuit, provide assurance for surveying level translator and high-voltage drive; Because luminous display circuit is made of light emitting diode (10) and current stabilization device (11) series connection, the brightness of light emitting diode and the power consumption of itself have been controlled effectively.Because circuit makes that rationally the utility model can pocketization.Switch can be contained on any a slice folder formula shell, make the utility model very easy to use.
Concrete circuit theory and structure will illustrate in conjunction with the following examples:
Figure (one) is the basic electrical schematic diagram of the pocket logic eye of folder formula;
Figure (two) is a kind of embodiment of threshold setting circuit;
Figure (three) is a kind of embodiment of threshold dector;
Figure (four) is a kind of embodiment of luminous display circuit;
Figure (five) is a kind of embodiment of power circuit;
Figure (six) is a folder formula shell synoptic diagram;
Figure (seven) is the synoptic diagram of T type skeleton;
Figure (eight) is the synoptic diagram of V-type spring;
Figure (nine) is a printed wire installing plate synoptic diagram;
Figure (ten) is the synoptic diagram of riveting dress printed wiring installing plate on the T type skeleton;
Figure (±) is the general assembly and the general assembly sectional view of the pocket logic eye of folder formula.
The basic electrical schematic diagram of the pocket logic eye of said folder formula is shown in figure ().(1) be to detect the contact pilotage of input simultaneously as multiterminal, it is necessarily flexible with having, and the electric conductivity good metal is made carefully bar-shaped, surface and plated with gold.(2) be the threshold setting circuit, it is by R
6, R
7, R
83 fixed resistance and the two passes (9) of casting aside of miniature hilted broadsword constitute, if satisfy R
7=R
8, R
6=3R
7V
R6+ V
R7+ V
R8=supply voltage is when switch (9) is connected R
7With R
8Between node, from the V of switch (9) cutter output
R8Be 20% supply voltage, and connect R when switch (9)
6With R
7Between node, from the V of switch (9) cutter output
R7+ V
R8It is 40% supply voltage.In other words, as long as change R
6, R
7, R
8Parameter, the voltage of switch (9) cutter output will be arbitrarily so; If hilted broadsword n casts aside the pass, fixed resistance is n+1, just can make the threshold setting circuit of n kind threshold value.Also can only threshold value be fixed on the supply voltage value of X% with two resistance.(3) be threshold dector, it is served as by operational amplifier or voltage comparator, enters the in-phase input end of detecting device from (1) next logical signal; And the threshold setting voltage of coming from switch (9) cutter end enters inverting input.(setting threshold) threshold dector output " 1 " when the value of the value 〉=end of oppisite phase of in-phase end, otherwise then output " 0 ".(4) be luminous display circuit.It is made of light emitting diode and the series connection of current stabilization device, and an end links to each other with the output terminal of threshold dector, and an end links to each other with the power circuit negative pole.When threshold dector output " 1 ", the electric current that lumination of light emitting diode, current stabilization device will flow through light emitting diode is limited on the constant value, with luminous power consumption control in minimum value.(5) be power circuit, it is made up of the terminal number n * 2+1 diode and an electrolytic condenser (13) of input end.On each input end (1), all also follow 2 opposite polarity diodes (12) and (29), constitute the electric power polarity judging circuit, diode (29) negative pole connects the positive pole of electrochemical capacitor (13), and the positive pole of diode (12) connects the negative pole of electrochemical capacitor (13).Like this, any two input ends (1) can obtain working power on this circuit from tested integrated circuit.When some input ends (1) just in time are clipped on the positive source of tested integrated circuit, diode on this end (29) conducting, because power end is the maximum potential end in the tested integrated circuit pin, so other diode (29) all disconnects.When some input ends (1) just in time were clipped on the ground end of tested integrated circuit, the diode on this end (12) conducting was because the ground end is the potential minimum in the tested integrated circuit pin, so other diode (12) all disconnects.Diode (15) is to guarantee that the positive source polarity that accessory power supply input socket (14) comes in is correct, and can prevent that polarity of voltage is wrong and burn out device.To between the 30V, the accessory power supply voltage of access, its positive potential must be higher than the maximum potential in whole leads ends of tested integrated circuit to the scope of accessory power supply voltage at 4.5V; Its electronegative potential then will be lower than the potential minimum of whole leads ends.Like this when accessory power supply inserts, all diode power source polarity discriminating circuit automatic cutouts.
The folder formula shell (16) of the pocket logic eye of said folder formula is shown in figure (six): top have a closure plate (18), and bearing pin (19) is arranged on the closure plate; Also have pin-and-hole seat (20) above, pin-and-hole (21) is arranged on the pin-and-hole seat; Bearing pin and pin-and-hole are on an axis.Also have stylus recess (22) above, contact pilotage backstop muscle (25), they all are for contact pilotage being remained on the neat face, and are spaced from each other, the pin-pitch of separation and integrated circuit is from equating.Making this shell can adopt ABS one class engineering plastics or other good insulating that certain flexible material is arranged, during installation, about the paddle one's own canoe elasticity of closure plate (18) of two folder formula shells, oneself bearing pin (19) is gone to constitute clamp type from the other side's pin-and-hole (21) is filled in the outside.There is a movable square hole clamp type top that constitutes, so that from then on the T type skeleton that printed-wiring board (PWB) has been installed can be loaded into.Said T type skeleton has two platoon leader holes (24) at its end face shown in figure (seven), so that light emitting diode (10) from then on stretches out, and an external auxiliary input socket (14) is arranged; Two rivet holes (27) are arranged, so that with the two sides of printed wiring board riveting at it on its main body; Two little grooves (23) are arranged, in order to V-type spring (26) to be installed in the both sides of its main body.A kind of installation method of components and parts on the printed-wiring board (PWB) is shown in figure (nine): (32) are and the corresponding rivet hole in hole (27); (1) be contact pilotage in welding printed-wiring board (PWB) (31), for well, material will wait electrically good the diameter of contact pilotage at 0.8mm, high resilience, and the surface should plate one deck gold; (10) be light emitting diode, they should neatly cosily be arranged in the slotted hole (24), and height is consistent; (30) be with circuit partly in except light emitting diode contact pilotage and switch, with other integrated circuit of making or solid-state circuit, this method good reliability, easily manufactured.Figure (ten) is the synoptic diagram of riveting dress printed wire installing plate on the T type skeleton, and (34) are the rivets that runs through T type skeleton main body and two printed wire installing plates, and certainly, also available screw and nut class securing member are fixed.
Figure (±) is the general assembly drawing and the general assembly sectional view of the pocket logic eye of folder formula, and (9) are switches, and this switch can be installed on any a slice folder formula shell.Because the effect of V-type spring (26) and folder formula shell upper flange (28), T type skeleton can not skid off from folder formula shell, and can be clipped on the integrated circuit that needs to detect as clip.
The contact pilotage that the utility model is used for the test side can be numbers such as 8,16,24,40.
If fixed resistance (6), (7), (8) are respectively 3K, 1K, 1K electric capacity (13) with 10 μ F/30V (3), threshold dector usefulness operational amplifier 324, diode (29) (12) (15) is used IN4148, and it can reach following index so.
Test specification: TTL, HTL, DTL, CMOS and NMOS.
Operating voltage :+4V～+ 24V
Working current: maximum 50mA
Back work power supply :+4.5V～+ 30V
Threshold voltage: operating voltage * (0.4 ± 0.06) or * (0.2 ± 0.03) two grades.
Import overload capacity: 35V/1 minute
When the LED(light emitting diode) bright, this pin voltage 〉=threshold voltage or this pin open circuit.
When the LED(light emitting diode) dark, this pin voltage＜threshold voltage.
The LED(light emitting diode) dark when bright, on this pin pulse voltage.
Claims (11)
1, a kind of electronic tool that is used for online detection dual inline type Digital Logic integrated circuit, specifically a kind of pocket logic eye of folder formula that can show the logic state of each leads ends simultaneously, it is characterized in that: two folder formula shells [16] are arranged, on said folder formula shell, stylus recess [22] is arranged, contact pilotage backstop muscle [25] closure plate [18] and pin-and-hole seat [20]; Bearing pin [19] is arranged on said closure plate [18], pin-and-hole [21] is arranged on pin-and-hole seat [20], pin-and-hole and bearing pin are on same axis, work in coordination into clamp type, at the inner chamber of clip, a T type skeleton [17] is arranged, on T type skeleton main body, two holes [27] are arranged, pass two rivets [34] in this two hole, two printed wire installing plates [31] are contained on two faces of mo(u)ld bottom half skeleton main body; In T type skeleton main body both sides one little groove [23] is arranged respectively, in order to V-type spring [26] to be installed; Two slotted holes [24] and accessory power supply input socket [14] are arranged on the end face of T type skeleton, said slotted hole is used to appear light emitting diode [10], on said every bar printing circuit installing plate [31], some contact pilotages [1] are arranged, power circuit [5], threshold dector [3], threshold setting circuit [2], luminous display circuit [4], the total quantity of contact pilotage [1] equates with the fan-in factor of the pocket logic eye of folder formula, and fitly be through in the stylus recess of folder formula shell, they are by circuit and power circuit on the printed wire installing plate, the in-phase input end of threshold dector links to each other, output terminal in the inverting input of threshold dector and the threshold setting circuit, the cutter end that is switch [9] links to each other, the output terminal of threshold dector links to each other with an end of luminous display circuit, and the other end of luminous display circuit links to each other with the negative pole of power circuit, other two ends of threshold setting circuit connect the power circuit both positive and negative polarity respectively, the number of threshold dector and illuminating circuit equates that with the quantity of contact pilotage switch [9] is contained on any a slice folder formula shell.
2, as the pocket logic eye of the said folder formula of claim 1, it is characterized in that said threshold circuit (2) is by metal resistor (6), (7), (8) series connection, and between (6) and (7), tap links to each other with switch (9) and constitutes between (7) and (8).
3,, it is characterized in that said luminous display circuit (4) is by light emitting diode (10) formation of connecting with current stabilization device (11) as the pocket logic eye of the said folder formula of claim 1.
4, as the pocket logic eye of the said folder formula of claim 1, it is characterized in that said power circuit is by diode (12), (15), (29) and capacitor (13) and accessory power supply input socket constitute, the total quantity of diode (12) and (29) is 2 times a contact pilotage number, the negative pole of the positive pole of diode (12) and diode (29) connects the negative pole and the positive pole of capacitor respectively, and the positive pole of the negative pole of diode (12) and diode (29) is connected to difference contact pin (1), the positive pole of diode (15) connects accessory power supply input socket (14) one utmost points, and negative pole connects the positive pole of capacitor, and another utmost point of accessory power supply input socket links to each other with the negative pole of capacitor.
5, as the pocket logic eye of the said folder formula of claim 1, it is characterized in that having two folder formula shells (16), T type skeleton (17), V-type spring (26) and two printed wire installing plates (31) have closure plate (18) pin-and-hole seat (20), stylus recess (22), contact pilotage backstop muscle (25) on said folder formula shell.Bearing pin (19) is arranged on the closure plate, pin-and-hole (21) is arranged on the pin-and-hole seat, bearing pin and pin-and-hole have two slotted holes (24), accessory power supply input socket (14) on said T type skeleton end face on same axis; Two holes (27) are arranged on the main body of T type skeleton, and the main body both sides have two little grooves (23), have on said printed wire installing plate and corresponding two holes, hole (27) (32), and folder formula shell and T type skeleton are made by plastics or other insulating material.
6, as the pocket logic eye of the said folder formula of claim 1, the contact pilotage that it is characterized in that it is by good conductivity, and resilient metal material is made.
7, as claim 1,2,3,4,5, the pocket logic eye of 6 said folder formulas, it is characterized in that said threshold dector (3) is an operation amplifier circuit.
8, as claim 1,2,3,4,5, the pocket logic eye of 6 said folder formulas, it is characterized in that said threshold dector (3) is a voltage comparator circuit.
9, as claim 1,2,3,4,5,6, the pocket logic eye of 7 or 8 said folder formulas, the circuit that it is characterized in that it is partly except contact pilotage (1), accessory power supply input socket (14), switch (9) and light emitting diode (10) in addition, other can make whole integrated circuit (30).
10, as claim 1,2,3,4,5,6, the pocket logic eye of 7 or 8 said folder formulas, the circuit that it is characterized in that it is partly except contact pilotage (1), accessory power supply input socket (14), switch (9) and light emitting diode (10) in addition, other can make whole solid-state circuit (30).
11, as claim 1,2,3,4,5,6, the pocket logic eye of 7 or 8 said folder formulas, the circuit that it is characterized in that it partly is to be made of discrete component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88211707 CN2035490U (en) | 1988-04-28 | 1988-04-28 | Clip type pocket logic indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88211707 CN2035490U (en) | 1988-04-28 | 1988-04-28 | Clip type pocket logic indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2035490U true CN2035490U (en) | 1989-04-05 |
Family
ID=4845090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88211707 Expired - Lifetime CN2035490U (en) | 1988-04-28 | 1988-04-28 | Clip type pocket logic indicator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2035490U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330171A (en) * | 2016-08-26 | 2017-01-11 | 成都启臣微电子股份有限公司 | Positive and negative voltage dynamic bias level shifting circuit based on negative voltage detection and band-gap reference |
| CN106885984A (en) * | 2017-01-03 | 2017-06-23 | 航天科工防御技术研究试验中心 | A kind of method of testing and system of the level translator of TTL to ECL |
-
1988
- 1988-04-28 CN CN 88211707 patent/CN2035490U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330171A (en) * | 2016-08-26 | 2017-01-11 | 成都启臣微电子股份有限公司 | Positive and negative voltage dynamic bias level shifting circuit based on negative voltage detection and band-gap reference |
| CN106330171B (en) * | 2016-08-26 | 2019-05-24 | 成都启臣微电子股份有限公司 | Positive/negative-pressure dynamic bias level displacement circuit based on detection of negative pressure and band-gap reference |
| CN106885984A (en) * | 2017-01-03 | 2017-06-23 | 航天科工防御技术研究试验中心 | A kind of method of testing and system of the level translator of TTL to ECL |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |