CN203232087U - A PG signal testing apparatus - Google Patents
A PG signal testing apparatus Download PDFInfo
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- CN203232087U CN203232087U CN 201320171540 CN201320171540U CN203232087U CN 203232087 U CN203232087 U CN 203232087U CN 201320171540 CN201320171540 CN 201320171540 CN 201320171540 U CN201320171540 U CN 201320171540U CN 203232087 U CN203232087 U CN 203232087U
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Abstract
The utility model is suitable for signal detection field and provides a PG signal testing apparatus. When a tested power supply is turned on, the PG signal testing apparatus delays the output voltage of the tested power supply with 100 ms to acquire first delayed voltage and delays the output voltage of the tested power supply with 500 ms to acquire second delayed voltage, compares a PG signal outputted by the tested power supply with the first delayed voltage, and compares the PG signal with the second delayed voltage. Then, according to comparative results, the PG signal testing apparatus controls an acousto-optic alarm module to achieve a corresponding acousto-optic alarm action in order to accurately notify a testing worker of a corresponding test result. In the meantime, after the tested power supply is turned on, the PG signal testing apparatus detects the level of the PG signal and correspondingly drives the acousto-optic alarm module to give an acousto-optic alarm in order that the testing worker accurately knows whether the PG signal suffers from level falling or jitter. The entire PG signal testing apparatus has characteristics of simple structure, low cost, and easy test.
Description
Technical field
The utility model belongs to the input field, relates in particular to a kind of PG signal-testing apparatus.
Background technology
According to Intel's code requirement, PC(is personal computer) power supply must provide PG signal (being Power Good signal) to be used for all information notification main board systems that power supply is ready under the normal situation of system boot and each group output of power supply, main board system can normally start when receiving the PG signal, so 95% back time-delay 100～500ms that the PG signal needs each the group output at power supply reach normal value realizes output again, and its high level of one+5V normally.When shutdown, the PG signal need power supply respectively organize output voltage drop to normal value (5V) 95% before time of 1ms at least transfer to low level with in advance with power-fail information notification main board system, the system of can being convenient to like this carries out shutdown in advance and prepares to avoid damaging system hardware.Therefore, in the production run of power supply, must carry out strict test to the PG signal and whether meet standard with the level of guaranteeing PG signal lag time and PG signal, and require when power supply is carried out vibration-testing the level of its PG signal can not occur falling or phenomenon such as shake.
At present, prior art is to adopt instrument only to test at the PG signal lag time of power supply start moment and the level of PG signal, the level state of PG signal after the power supply start whether normally then often be left in the basket or inconvenient tester identification with judge.So, generally be to adopt oscillograph to watch the delay time of PG signal and level in vibration processes, to have or not to fall or shake.Can observe the situation of PG signal comparatively intuitively though utilize the oscillograph monitoring, but all must be by eye-observation in whole test process, make tester's asthenopia easily and cause test to make mistakes, and oscillographic price is higher relatively, has increased testing cost virtually.Therefore, there is the problem that test result is made mistakes easily and testing cost is high in existing P G signal testing mode.
The utility model content
The purpose of this utility model is to provide a kind of PG signal-testing apparatus, is intended to solve the problem that the existing test result of existing P G signal testing mode is made mistakes easily and testing cost is high.
The utility model is achieved in that a kind of PG signal-testing apparatus, is connected with tested power supply, and described PG signal-testing apparatus comprises:
Power voltage terminal is connected described tested power source voltage output terminal and standby voltage output end respectively with the supply voltage end, according to the first voltage time delay module of 100 milliseconds the time intervals to described tested power supply output first time-delay voltage after the output voltage in when start carries out delay process;
Power voltage terminal is connected described tested power source voltage output terminal and standby voltage output end respectively with the supply voltage end, according to 500 milliseconds the time intervals to described tested power supply output second time-delay voltage after the output voltage in when start carries out delay process, and behind described tested power supply normal boot-strap, generate the second voltage time delay module of level detection reference signal;
Input end connects the PG signal output part of described tested power supply, introduces the PG signal from described tested power supply, and divides two-way to export the PG signal input module of described PG signal;
Power end connects the standby voltage output end of described tested power supply, voltage input end is connected the output terminal of the described first voltage time delay module and first output terminal of described PG signal input module respectively with the PG signal input part, when described tested power supply is started shooting, the described first time-delay voltage and described PG signal are compared, and correspondingly export the first signal comparison module of first comparison signal according to comparative result;
Power end connects the standby voltage output end of described tested power supply, voltage input end is connected the output terminal of the described second voltage time delay module and second output terminal of described PG signal input module respectively with the PG signal input part, when described tested power supply is started shooting, the described second time-delay voltage and described PG signal are compared, and correspondingly export second comparison signal according to comparative result, and behind described tested power supply normal boot-strap, described PG signal and described level detection reference signal are compared, and according to the comparative result secondary signal comparison module of output level detecting consequential signal correspondingly;
Input end connects the standby voltage output end of described tested power supply, output terminal connects the power end of the described first signal comparison module and the power end of described secondary signal comparison module simultaneously, is the comparison power module of the described first signal comparison module and the power supply of described secondary signal comparison module;
Voltage input end is connected described tested power source voltage output terminal and standby voltage output end respectively with the standby voltage input end, generates the indicator signal generation module of non-defective unit indication time delayed signal;
Power end is connected the signal output part of described tested power source voltage output terminal and described indicator signal generation module respectively with the indication drive end, control end connects the output terminal of the described first signal comparison module and the output terminal of described secondary signal comparison module simultaneously, when described tested power supply is started shooting, according to described first comparison signal, described second comparison signal and described non-defective unit are indicated time delayed signal to start or are closed sound and light alarm, behind described tested power supply normal boot-strap, indicate time delayed signal to start or close the sound and light alarm module of sound and light alarm according to described level detecting consequential signal and described non-defective unit.
Further, described PG signal-testing apparatus also comprises:
Input end connects the standby voltage output end of described tested power supply, first output terminal is connected the voltage input end of the described first signal comparison module and the voltage input end of described secondary signal comparison module respectively with second output terminal, when described tested power supply was not started shooting, the voltage of keeping the PG signal input part of the voltage of voltage input end of the described first signal comparison module and described secondary signal comparison module was higher than the voltage of voltage of the voltage input end of the voltage of PG signal input part of the described first signal comparison module and described secondary signal comparison module respectively and keeps module.
Further, described PG signal-testing apparatus also comprises:
Controlled end connects the off signal output terminal of described tested power supply, the shielding control end connects the control end of described sound and light alarm module, when described tested power supply shuts down, control the wrong report shielding control module that described sound and light alarm module is forbidden sound and light alarm according to the PS-OFF off signal of described tested power supply output.
The utility model comprises the first voltage time delay module by employing, the second voltage time delay module, the PG signal input module, the first signal comparison module, the secondary signal comparison module, the PG signal-testing apparatus of indicator signal generation module and sound and light alarm module, when the start of tested power supply respectively to the output voltage time-delay 100ms of tested power supply and time-delay 500ms to obtain the first time-delay voltage and the second time-delay voltage, and the PG signal of tested power supply output compared with the first time-delay voltage and the second time-delay voltage respectively, realize that according to comparative result control acousto-optic alarm module corresponding sound and light alarm action is accurately to inform the corresponding test result of tester then, simultaneously behind tested power supply normal boot-strap the PG signal being carried out level detecting and respective drive sound and light alarm module sends sound and light alarm and so that the tester is accurately known the PG signal whether level down or shake takes place, whole PG signal-testing apparatus simple in structure, low and the convenient test of cost has solved the problem that the existing test result of existing P G signal testing mode is made mistakes easily and testing cost is high.
Description of drawings
Fig. 1 is the modular structure figure of the PG signal-testing apparatus that provides of the utility model embodiment;
Fig. 2 is the exemplary circuit structural drawing of the PG signal-testing apparatus that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The utility model embodiment comprises the first voltage time delay module by employing, the second voltage time delay module, the PG signal input module, the first signal comparison module, the secondary signal comparison module, the PG signal-testing apparatus of indicator signal generation module and sound and light alarm module, when the start of tested power supply respectively to the output voltage time-delay 100ms of tested power supply and time-delay 500ms to obtain the first time-delay voltage and the second time-delay voltage, and the PG signal of tested power supply output compared with the first time-delay voltage and the second time-delay voltage respectively, realize that according to comparative result control acousto-optic alarm module corresponding sound and light alarm action is accurately to inform the corresponding test result of tester then, simultaneously behind tested power supply normal boot-strap the PG signal being carried out level detecting and respective drive sound and light alarm module sends sound and light alarm and so that the tester is accurately known the PG signal whether level down or shake takes place, whole PG signal-testing apparatus simple in structure, the low and convenient test of cost.
Fig. 1 shows the modular structure of the PG signal-testing apparatus that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model, and details are as follows:
The PG signal-testing apparatus 100 that the utility model embodiment provides is connected with tested power supply 200, tested power supply 200 has voltage output end+5V, standby voltage output end+5VSB, PG signal output part PG and off signal output terminal PS, and respectively output+5V output voltage ,+5V standby voltage, PG signal (Power Good signal) and PS-OFF off signal.
PG signal-testing apparatus 100 comprises:
Power voltage terminal and supply voltage end are connected voltage output end+5V and the standby voltage output end+5VSB of tested power supply 200 respectively, according to 100 milliseconds the time intervals to the output voltage of tested power supply 200 when the start (+5V) carry out delay process after the first voltage time delay module 101 of the output first time-delay voltage;
Power voltage terminal and supply voltage end are connected voltage output end+5V and the standby voltage output end+5VSB of tested power supply 200 respectively, according to 500 milliseconds the time intervals to tested power supply 200 the output voltage in when start (+5V) carry out delay process after the output second time-delay voltage, and behind tested power supply 200 normal boot-straps, generate the second voltage time delay module 102 of level detection reference signal;
Input end connects the PG signal output part PG of tested power supply 200, introduces the PG signal from tested power supply 200, and divides two-way to export the PG signal input module 103 of this PG signal;
Voltage input end is connected the output terminal of the first voltage time delay module 101 and first output terminal of PG signal input module 103 respectively with the PG signal input part, when tested power supply 200 is started shooting, the described first time-delay voltage and described PG signal are compared, and correspondingly export the first signal comparison module 104 of first comparison signal according to comparative result;
Voltage input end is connected the output terminal of the second voltage time delay module 102 and second output terminal of PG signal input module 103 respectively with the PG signal input part, when tested power supply 200 is started shooting, the described second time-delay voltage and described PG signal are compared, and correspondingly export second comparison signal according to comparative result, and behind tested power supply 200 normal boot-straps, described PG signal and described level detection reference signal are compared, and according to the comparative result secondary signal comparison module 105 of output level detecting consequential signal correspondingly;
Input end connects the standby voltage output end+5VSB of tested power supply 200, output terminal connects the power end of the first signal comparison module 104 and the power end of secondary signal comparison module 105 simultaneously, is the comparison power module 110 of the first signal comparison module 104 and 105 power supplies of secondary signal comparison module;
Voltage input end is connected tested power source voltage output terminal+5V and standby voltage output end+5VSB respectively with the standby voltage input end, generates the indicator signal generation module 106 of non-defective unit indication time delayed signal;
Power end is connected the voltage output end of tested power supply 200 and the signal output part of indicator signal generation module 106 respectively with the indication drive end, control end connects the output terminal of the first signal comparison module 104 and the output terminal of secondary signal comparison module 105 simultaneously, when tested power supply 200 is started shooting, according to described first comparison signal, described second comparison signal and described non-defective unit are indicated time delayed signal to start or are closed sound and light alarm, behind tested power supply 200 normal boot-straps, indicate time delayed signal to start or close the sound and light alarm module 107 of sound and light alarm according to described level detecting consequential signal and described non-defective unit.
When not starting shooting (namely only output+5V standby voltage) at tested power supply 200, floating and causing the circuit instability appears in the voltage for fear of the PG signal input part of the voltage input end of the first signal comparison module 104 and secondary signal comparison module 105, and the PG signal-testing apparatus can further include:
Input end connects the standby voltage output end+5VSB of tested power supply 200, first output terminal is connected the voltage input end of the first signal comparison module and the voltage input end of secondary signal comparison module respectively with second output terminal, when tested power supply 200 was not started shooting, the voltage of keeping the PG signal input part of the voltage of voltage input end of the first signal comparison module and secondary signal comparison module was higher than the voltage of voltage of the voltage input end of the voltage of PG signal input part of the first signal comparison module and secondary signal comparison module respectively and keeps module 108.
Because when tested power supply 200 shuts down, its PG signal output part PG can shift to an earlier date 1ms and be converted to low level output, make the first signal comparison module 104 and secondary signal comparison module 105 take for that falling appears in the PG signal or shake and output level detecting consequential signal drive sound and light alarm module 107 and realize sound and light alarms for fear of the low level in this 1ms time interval, the PG signal-testing apparatus can further include:
Controlled end connects the off signal output terminal PS of tested power supply 200, the shielding control end connects the control end of sound and light alarm module 107, when tested power supply 200 shuts down, forbid the wrong report shielding control module 109 of sound and light alarm according to the PS-OFF off signal control acousto-optic alarm module 107 of tested power supply 200 outputs.
Fig. 2 shows the exemplary circuit structure of the PG signal-testing apparatus that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model, and details are as follows:
As the utility model one preferred embodiment, the first voltage time delay module 101 comprises:
Electrochemical capacitor C1, capacitor C 2, electrochemical capacitor C3, capacitor C 4, Transient Suppression Diode ZD1, resistance R 1, resistance R 2, voltage delay process device U1, capacitor C 5, resistance R 3, capacitor C 6, resistance R 4, diode D1 and resistance R 5;
The just very power voltage terminal of the first voltage time delay module 101 of electrochemical capacitor C1, first end of capacitor C 2 connects the positive pole of electrochemical capacitor C1, second end of capacitor C 2 and the negative pole of electrochemical capacitor C1 are connected to ground altogether, the just very supply voltage end of the first voltage time delay module 101 of electrochemical capacitor C3, first end of capacitor C 4 and the negative electrode of Transient Suppression Diode ZD1 are connected to the positive pole of electrochemical capacitor C3 altogether, second end of capacitor C 4, the negative pole of the anode of Transient Suppression Diode ZD1 and electrochemical capacitor C3 is connected to ground altogether, first end of resistance R 1 connects the positive pole of electrochemical capacitor C1, second end of resistance R 1 and first end of resistance R 2 are connected to the input pin IN of voltage delay process device U1 altogether, the grounding leg GND of second end of resistance R 2 and voltage delay process device U1 and first end of capacitor C 5 are connected to ground altogether, second end of capacitor C 5 connects the time-delay pin DC of voltage delay process device U1, the power supply pin SV of voltage delay process device U1 and first end of resistance R 3 are connected to first end of capacitor C 6 altogether, the second end ground connection of capacitor C 6, the output pin OUT of voltage delay process device U1 and first end of resistance R 4 are connected to the anode of diode D1 altogether, the first empty pin NC1 of voltage delay process device U1, the second empty pin NC2 and the equal sky of the 3rd empty pin NC3 connect, second end of resistance R 3 and second end of resistance R 4 are connected to the positive pole of electrochemical capacitor C3 altogether, the negative electrode of diode D1 is the output terminal of the first voltage time delay module 101, and resistance R 5 is connected between the negative electrode and ground of diode D1.
As the utility model one preferred embodiment, the second voltage time delay module 102 comprises:
Capacitor C 7, capacitor C 8, resistance R 6, resistance R 7, Transient Suppression Diode ZD2, voltage delay process device U2, capacitor C 9, capacitor C 10, resistance R 8, capacitor C 11, resistance R 9, resistance R 10, diode D2 and resistance R 11;
First end of capacitor C 7 and first end of capacitor C 8 are respectively power voltage terminal and the supply voltage end of the second voltage time delay module 102, second end of capacitor C 7 and second end of capacitor C 8 are connected to ground altogether, first end of resistance R 6 and the negative electrode of Transient Suppression Diode ZD2 are connected to first end of capacitor C 7 altogether, second end of resistance R 6 and first end of resistance R 7 are connected to the input pin IN of voltage delay process device U2 altogether, second end of resistance R 7 and the anode of Transient Suppression Diode ZD2, the grounding leg GND of voltage delay process device U2, first end of capacitor C 9, first end of capacitor C 10 is connected to ground altogether, second end of capacitor C 9 and second end of capacitor C 10 are connected to the time-delay pin DC of voltage delay process device U2 altogether, the power supply pin SV of voltage delay process device U2 and first end of resistance R 8 are connected to first end of capacitor C 11 altogether, the second end ground connection of capacitor C 11, first end of the output pin OUT of voltage delay process device U2 and first end of resistance R 9 and resistance R 10 is connected to the anode of diode D2 altogether, second end of resistance R 8 and second end of resistance R 9 are connected to first end of capacitor C 8 altogether, the first empty pin NC1 of voltage delay process device U2, the second empty pin NC2 and the equal sky of the 3rd empty pin NC3 connect, the negative electrode of diode D2 is the output terminal of the second voltage time delay module 102, first end of resistance R 11 connects the negative electrode of diode D2, and second end of resistance R 10 and second end of resistance R 11 are connected to ground altogether.
As the utility model one preferred embodiment, PG signal input module 103 comprises:
Resistance R 12, capacitor C 12, resistance R 13, diode D3, diode D4 and resistance R 14;
The formed contact altogether of the anode of first end of resistance R 12 and first end of capacitor C 12 and diode D4 is the input end of PG signal input module 103, second end of resistance R 12 connects the anode of diode D3, second end of capacitor C 12 and first end of resistance R 13 are connected to ground altogether, the formed contact altogether of second end of resistance R 13 and the negative electrode of diode D3 is first output terminal of PG signal input module 103, the negative electrode of diode D4 is second output terminal of PG signal input module 103, and resistance R 14 is connected between the negative electrode and ground of diode D4.
As the utility model one preferred embodiment, the first signal comparison module 104 comprises:
Comparer U3, resistance R 16 and diode D5;
The positive power source terminal of comparer U3 is the power end of the first signal comparison module 104, the inverting input of comparer U3 and in-phase input end are respectively voltage input end and the PG signal input part of the first signal comparison module 104, first end of the output terminal of comparer U3 and resistance R 16 is connected to the anode of diode D5 altogether, the negative electrode of diode D5 is the output terminal of the first signal comparison module 104, and second end of resistance R 16 and the negative power end of comparer U3 are connected to ground altogether.
As the utility model one preferred embodiment, secondary signal comparison module 105 comprises:
Comparer U4, resistance R 18 and diode D6;
The positive power source terminal of comparer U4 is the power end of secondary signal comparison module 105, the in-phase input end of comparer U4 and inverting input are respectively voltage input end and the PG signal input part of secondary signal comparison module 104, first end of the output terminal of comparer U4 and resistance R 18 is connected to the anode of diode D6 altogether, the negative electrode of diode D6 is the output terminal of secondary signal comparison module 105, and second end of resistance R 18 and the negative power end of comparer U4 are connected to ground altogether.
As the utility model one embodiment, relatively power module 110 comprises resistance R 15 and capacitor C 13, and first end of resistance R 15 and second end are respectively input end and the output terminal of comparison power module 110, and capacitor C 13 is connected between second end and ground of resistance R 15.
As the utility model one preferred embodiment, indicator signal generation module 106 comprises:
Resistance R 26, resistance R 27, voltage delay process device U5, capacitor C 17, capacitor C 18, resistance R 28, capacitor C 19 and resistance R 29;
First end of resistance R 26 is the voltage input end of indicator signal generation module 106, second end of resistance R 26 and first end of resistance R 27 are connected to the input pin IN of voltage delay process device U5 altogether, the grounding leg GND of second end of resistance R 27 and voltage delay process device U5, first end of capacitor C 17 and first end of capacitor C 18 are connected to ground altogether, second end of capacitor C 17 and second end of capacitor C 18 are connected to the time-delay pin DC of voltage delay process device U5 altogether, the power supply pin SV of voltage delay process device U5 and first end of resistance R 28 are connected to first end of capacitor C 19 altogether, second end of resistance R 28 is the standby voltage input end of indicator signal generation module 106, the second end ground connection of capacitor C 19, the output pin OUT of voltage delay process device U5 is the signal output part of indicator signal generation module 106, and resistance R 29 is connected between the output pin OUT of second end of resistance R 28 and voltage delay process device U5.
As the utility model one preferred embodiment, sound and light alarm module 107 comprises:
Resistance R 19, NPN type triode Q1, positive-negative-positive triode Q2, capacitor C 15, resistance R 20, resistance R 21, LED 1, hummer BZ1, capacitor C 16, resistance R 22, resistance R 23, diode D7, resistance R 24, resistance R 25, NPN type triode Q3 and LED 2;
First end of resistance R 19 is the control end of sound and light alarm module 107, second end of resistance R 19 and first end of capacitor C 16 are connected to the base stage of NPN type triode Q1 altogether, the collector and emitter of NPN type triode Q1 connects base stage and the ground of positive-negative-positive triode Q2 respectively, the collector of positive-negative-positive triode Q2 and first end of resistance R 22 are connected to first end of capacitor C 16 altogether, the formed contact altogether of first end of first end of capacitor C 15 and first end of resistance R 20 and resistance R 23 is the power end of sound and light alarm module 107, the second end ground connection of capacitor C 15, second end of resistance R 20 and first end of resistance R 21 are connected to the positive pole of hummer BZ1 altogether, second end of resistance R 21 connects the anode of LED 1, the negative electrode of the negative pole of the negative electrode of LED 1 and hummer BZ1 and diode D7 is connected to the emitter of positive-negative-positive triode Q2 altogether, second end of the anode of diode D7 and resistance R 23 is connected to first end of resistance R 24 altogether, second end of resistance R 24 and first end of resistance R 25 are connected to the base stage of NPN type triode Q3 altogether, the emitter of second end of resistance R 25 and NPN type triode Q3, second end of resistance R 22 and second end of capacitor C 16 are connected to ground altogether, the negative electrode of LED 2 connects the collector of NPN type triode Q3, and the anode of LED 2 is the indication drive end of sound and light alarm module 107.
As the utility model one preferred embodiment, voltage is kept module 108 and is comprised:
Resistance R 30, resistance R 31, diode D8 and diode D9;
First end of resistance R 30 is the input end that voltage is kept module 108, the anode of second end of resistance R 30 and first end of resistance R 31 and diode D8 is connected to the anode of diode D9 altogether, the second end ground connection of resistance R 31, the negative electrode of the negative electrode of diode D8 and diode D9 are respectively first output terminal and second output terminal that voltage is kept module 108.
As the utility model one preferred embodiment, wrong report shielding control module 109 comprises resistance R 32 and NPN type triode Q4, first end of resistance R 32 is the controlled end of wrong report shielding control module 109, second end of resistance R 32 connects the base stage of NPN type triode Q4, the current collection of NPN type triode Q4 is very reported the shielding control end of shielding control module 109, the grounded emitter of NPN type triode Q4 by mistake.
In the utility model embodiment, it is the integrated IC of power management of M51957B that above-mentioned voltage delay process device U1, voltage delay process device U2 and voltage delay process device U5 specifically can adopt model; LED 1 and LED 2 are respectively by luminous expression PG abnormal signal and normal, and the glow color of LED 1 herein is red, and the glow color of LED 2 is green.
Below in conjunction with concrete principle of work above-mentioned PG signal-testing apparatus is described further:
Voltage delay process device U1 and capacitor C 5(its as delay capacitor) delay circuit that constitutes to tested power supply 200 export+the 5V output voltage carries out the time-delay of 100ms, unit by time-delay computing formula Td (μ S) ≈ 0.34*Cd(Cd is pF) as can be known, delay time Td(is 100ms) be to be determined by the capacitance of capacitor C 5, when the voltage of the input pin IN of voltage delay process device U1 reaches trigger voltage 1.25V, transfer high level (i.e. the first time-delay voltage) behind the output pin OUT process time-delay 100ms of voltage delay process device U1 to, this high level exports the inverting input of comparer U3 to by diode D1, when the voltage of the input pin IN of voltage delay process device U1 is lower than 1.25V, its output pin OUT transfers low level (i.e. the first time-delay voltage) at once, so voltage delay process device U1 can not carry out delay process to low level.Resistance R 4 is the pull-up resistor of the output pin OUT of voltage delay process device U1.Before 200 starts of tested power supply ,+5V standby voltage is carried in voltage delay process device U1 through resistance R 3 power supply pin SV is to realize power supply (voltage delay process device U2, comparer U3, comparer U4 and voltage delay process device U5 realize power supply by+5V standby voltage).When tested power supply 200 is started shooting, when the voltage of its voltage output end+5V+rise to 4.75V(be 5V voltage 95%) during the left and right sides, it carries out making behind the voltage sampling that through resistance R 1 and resistance R 2 voltage of input pin IN of voltage delay process device U1 is 1.25V, enter the inverting input of comparer U3 then after time by diode D1 from its output pin OUT output high level (i.e. the first time-delay voltage) through 100ms, this high level is because of the dividing potential drop through resistance R 4 and resistance R 5, make the voltage of inverting input of comparer U3 be about about 4.4V, meanwhile, the PG signal process resistance R 12 that tested power supply 200 is exported and diode D3 are to the in-phase input end of comparer U3, also take a sample through resistance R 12 and 13 pairs of these PG signals of resistance R simultaneously, make the voltage of in-phase input end of comparer U3 be about about 3.2V.
If the delay time of PG signal greater than 100ms(just the 3.2V voltage of the U3 of its in-phase input end of 4.4V voltage ratio of the inverting input of comparer U3 arrive first), the output terminal output low level of comparer U3 (i.e. first comparison signal) then, this low level can't driving N PN type triode Q1 conducting, so whole sound and light alarm module 107 makes LED 2 luminous normal with prompting PG signal under the control of the non-defective unit indication time delayed signal that the output terminal OUT of voltage delay process device U5 exports.
If the delay time of PG signal is less than 100ms, then the output terminal of comparer U3 output high level (i.e. first comparison signal) is added to the base stage of NPN type triode Q1 after diode D5 and the dividing potential drop by resistance R 19 and resistance R 22, and then make NPN type triode Q1 conducting, the collector current that produces after the NPN type triode Q1 conducting forces positive-negative-positive triode Q2 conducting, collector current after the positive-negative-positive triode Q2 conducting feeds back to the base stage of NPN type triode Q1 again, so the positive feedback that forms makes NPN type triode Q1 and positive-negative-positive triode Q2 all be in the lock-out state of saturation conduction very soon, meanwhile, start working and send chimes of doom by hummer BZ1, and LED 1 sends red light.The effect of NPN type triode Q1 and positive-negative-positive triode Q2 is that the high level that comparer U3 exports at short notice is locked in alarm condition when long, up to tested power supply 200 shutdown, namely+the 5V output voltage disappears, can carry out next time and test.
10 delay circuits that constitute of voltage delay process device U2 and capacitor C 9 and capacitor C to tested power supply 200 export+the 5V output voltage carries out the delay process of 500ms, its principle is identical with voltage delay process device U1, when tested power supply 200 is started shooting, when the voltage of its voltage output end+5V rise to 4.75V(be 5V voltage 95%) about, and the output pin OUT from voltage delay process device U2 exports high level behind 500ms, this high level is by diode D2 output and through resistance R 9, making the in-phase input end voltage of comparer U4 after resistance R 10 and resistance R 11 dividing potential drops is about 2.6V, meanwhile, the PG signal that tested power supply 200 is exported enters the inverting input of comparer U4 through diode D4, and its voltage is about 4.5V.When the delay time of PG signal during less than 500ms, the output terminal of comparer U4 is low level, NPN type triode Q1 and all not conductings of positive-negative-positive triode Q2, then LED 1 and hummer BZ1 do not work, LED 2 sends green light and represents that the PG signal is normal, otherwise, when the delay time of PG signal during greater than 500ms, then the output terminal of comparer U4 is high level (second comparison signal), this high level (second comparison signal) is through diode D6 driving N PN type triode Q1 and positive-negative-positive triode Q2 conducting, then hummer BZ1 starts working and sends chimes of doom, and LED 1 sends red light to inform tester PG abnormal signal.
The appearance of the voltage of two input ends of when output (only have+5V standby voltage) comparer U3 and comparer U4 is not floated and is caused the circuit instability when starting shooting for fear of tested power supply 200, can be carried in the inverting input of comparer U3 and the inverting input of comparer U4 respectively through diode D8 and diode D9 by resistance R 30 and resistance R 31 voltage from about standby voltage output end+5VSB sampling 1V of tested power supply 200, and then before 200 starts of tested power supply, make the voltage of inverting input of comparer U3 and comparer U4 be higher than the voltage of in-phase input end, guarantee that comparer U3 and comparer U4 misoperation can not occur.
Behind tested power supply 200 normal boot-straps, rely on comparer U4 to finish to the level down of PG signal or the detecting of shake.Tested power supply 200 exports+and 5V standby voltage is through resistance R 9, resistance R 10 and resistance R 11 are taken a sample and made the voltage of the in-phase input end of comparer U4 by diode D2 is about 2.6V, the PG signal is added to the inverting input of comparer U4 through diode D4 simultaneously, because the voltage difference at diode D4 the two poles of the earth is about 0.5V, the PG voltage of signals is about 5V, so the voltage of the in-phase input end of comparer U4 approximates about 4.5V, so tested power supply 200 normal boot-straps and in vibration-testing, as long as the voltage of the inverting input of comparer U4 is lower than 2.6V(also namely when the PG voltage of signals is lower than the 3V left and right sides), then the output terminal of comparer U4 will be exported high level (being the level detection reference signal) driving N PN type triode Q1 and positive-negative-positive triode Q2 conducting, then hummer BZ1 starts working and sends chimes of doom, and LED 1 sends red light and occurs falling or shaking to inform tester PG signal.
The effect of voltage delay process device U5 is to non-defective unit indication time delayed signal is provided, its delay time setting is grown slightly than 500ms and is got final product, capacitor C 17 is 1.56uF with the value in parallel of capacitor C 18 herein, can calculate its time-delay and be about 530ms, namely behind the 530ms of tested power supply 200 normal boot-straps, the output terminal OUT output high level of voltage delay process device U5 (being non-defective unit indication time delayed signal), this high level provides collector current through LED 2 for NPN type triode Q3, if this moment, the PG signal was normal, then NPN type triode Q1 and positive-negative-positive triode Q2 are in cut-off state, the emission of positive-negative-positive triode Q2 is high level very, diode D7 is cut-off state, tested power supply 200+the 5V output voltage is through resistance R 23, the dividing potential drop circuit that resistance R 24 and resistance R 25 are formed provides base current for NPN type triode Q3, then NPN type triode Q3 conducting, the collector current of NPN type triode Q3 makes LED 2 send green light, thereby finishes the non-defective unit indication.If PG abnormal signal, the high level of comparer U4 output makes NPN type triode Q1 and positive-negative-positive triode Q2 conducting, hummer BZ1 starts working and sends chimes of doom, and LED 1 sends red light to finish the indication of defective products, the emitter of positive-negative-positive triode Q2 transfers low level to force also conducting of diode D7, the conducting of diode D7 ends NPN type triode Q3, and then LED 2 passes through not luminous because of no current.
Because when tested power supply 200 shuts down, the PG signal can shift to an earlier date 1ms and transfer low level to, make comparer U3 and comparer U4 output high level trigger that hummer BZ1 and LED 1 send sound and light alarm and the judgement that misleads the tester for fear of this 1ms, can shield by NPN type triode Q4 herein, when tested power supply 200 shuts down because of the PS-OFF off signal, its PS-OFF off signal is high level (being low level during start), this high level is added to the base stage of NPN type triode Q4 through resistance R 321, make NPN type triode Q4 conducting, the conducting of NPN type triode Q4 makes the B utmost point of NPN type triode Q1 be in low level, then NPN type triode Q1 ends, thereby the 1ms low level of exporting when making 200 shutdown of tested power supply is not enough to trigger hummer BZ1 and LED 1 sends sound and light alarm.When 200 starts of tested power supply, the low level of PS-OFF off signal can not make NPN type triode Q4 conducting, so that the test of PG signal is unaffected.
In the utility model embodiment, it is 334 electric capacity that capacitor C 5 is got type, be that its capacitance value is 330000PF, its with voltage delay process device U1 finish+the 5V output voltage carries out the delay process of 100ms, can calculate its delay time according to computing formula Td (μ S) ≈ 0.34*Cd and be about 112ms, and in fact because of 334 electric capacity deviation is arranged, just can make its time-delay about 100mS so choose minus tolerance electric capacity.Capacitor C 9 and capacitor C 10 are finished right+5V output voltage and are carried out the time-delay of 500ms with voltage delay process device U2, for avoiding capacitance tolerance to obtain delay time accurately, can take the mode of a plurality of electric capacity parallel connections to solve.Capacitor C 17 and capacitor C 18 are finished the deixis that non-defective unit is delayed time with voltage delay process device U4, and as long as its time-delay is longer slightly than 500ms.The voltage stabilizing value of Transient Suppression Diode ZD1 and Transient Suppression Diode ZD2 is about 13V, prevents that overshoot voltage from causing damage to PG signal-testing apparatus 100 in the time of can occurring bad phenomenon such as unusual, aircraft bombing at tested power supply 200.
The utility model embodiment comprises the first voltage time delay module by employing, the second voltage time delay module, the PG signal input module, the first signal comparison module, the secondary signal comparison module, the PG signal-testing apparatus of indicator signal generation module and sound and light alarm module, when the start of tested power supply respectively to the output voltage time-delay 100ms of tested power supply and time-delay 500ms to obtain the first time-delay voltage and the second time-delay voltage, and the PG signal of tested power supply output compared with the first time-delay voltage and the second time-delay voltage respectively, realize that according to comparative result control acousto-optic alarm module corresponding sound and light alarm action is accurately to inform the corresponding test result of tester then, simultaneously behind tested power supply normal boot-strap the PG signal being carried out level detecting and respective drive sound and light alarm module sends sound and light alarm and so that the tester is accurately known the PG signal whether level down or shake takes place, whole PG signal-testing apparatus simple in structure, low and the convenient test of cost has solved the problem that the existing test result of existing P G signal testing mode is made mistakes easily and testing cost is high.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. a PG signal-testing apparatus is connected with tested power supply, it is characterized in that, described PG signal-testing apparatus comprises:
Power voltage terminal is connected described tested power source voltage output terminal and standby voltage output end respectively with the supply voltage end, according to the first voltage time delay module of 100 milliseconds the time intervals to described tested power supply output first time-delay voltage after the output voltage in when start carries out delay process;
Power voltage terminal is connected described tested power source voltage output terminal and standby voltage output end respectively with the supply voltage end, according to 500 milliseconds the time intervals to described tested power supply output second time-delay voltage after the output voltage in when start carries out delay process, and behind described tested power supply normal boot-strap, generate the second voltage time delay module of level detection reference signal;
Input end connects the PG signal output part of described tested power supply, introduces the PG signal from described tested power supply, and divides two-way to export the PG signal input module of described PG signal;
Power end connects the standby voltage output end of described tested power supply, voltage input end is connected the output terminal of the described first voltage time delay module and first output terminal of described PG signal input module respectively with the PG signal input part, when described tested power supply is started shooting, the described first time-delay voltage and described PG signal are compared, and correspondingly export the first signal comparison module of first comparison signal according to comparative result;
Power end connects the standby voltage output end of described tested power supply, voltage input end is connected the output terminal of the described second voltage time delay module and second output terminal of described PG signal input module respectively with the PG signal input part, when described tested power supply is started shooting, the described second time-delay voltage and described PG signal are compared, and correspondingly export second comparison signal according to comparative result, and behind described tested power supply normal boot-strap, described PG signal and described level detection reference signal are compared, and according to the comparative result secondary signal comparison module of output level detecting consequential signal correspondingly;
Input end connects the standby voltage output end of described tested power supply, output terminal connects the power end of the described first signal comparison module and the power end of described secondary signal comparison module simultaneously, is the comparison power module of the described first signal comparison module and the power supply of described secondary signal comparison module;
Voltage input end is connected described tested power source voltage output terminal and standby voltage output end respectively with the standby voltage input end, generates the indicator signal generation module of non-defective unit indication time delayed signal;
Power end is connected the signal output part of described tested power source voltage output terminal and described indicator signal generation module respectively with the indication drive end, control end connects the output terminal of the described first signal comparison module and the output terminal of described secondary signal comparison module simultaneously, when described tested power supply is started shooting, according to described first comparison signal, described second comparison signal and described non-defective unit are indicated time delayed signal to start or are closed sound and light alarm, behind described tested power supply normal boot-strap, indicate time delayed signal to start or close the sound and light alarm module of sound and light alarm according to described level detecting consequential signal and described non-defective unit.
2. PG signal-testing apparatus as claimed in claim 1 is characterized in that, described PG signal-testing apparatus also comprises:
Input end connects the standby voltage output end of described tested power supply, first output terminal is connected the voltage input end of the described first signal comparison module and the voltage input end of described secondary signal comparison module respectively with second output terminal, when described tested power supply was not started shooting, the voltage of keeping the PG signal input part of the voltage of voltage input end of the described first signal comparison module and described secondary signal comparison module was higher than the voltage of voltage of the voltage input end of the voltage of PG signal input part of the described first signal comparison module and described secondary signal comparison module respectively and keeps module.
3. PG signal-testing apparatus as claimed in claim 1 is characterized in that, described PG signal-testing apparatus also comprises:
Controlled end connects the off signal output terminal of described tested power supply, the shielding control end connects the control end of described sound and light alarm module, when described tested power supply shuts down, control the wrong report shielding control module that described sound and light alarm module is forbidden sound and light alarm according to the PS-OFF off signal of described tested power supply output.
4. PG signal-testing apparatus as claimed in claim 1 is characterized in that, the described first voltage time delay module comprises:
Electrochemical capacitor C1, capacitor C 2, electrochemical capacitor C3, capacitor C 4, Transient Suppression Diode ZD1, resistance R 1, resistance R 2, voltage delay process device U1, capacitor C 5, resistance R 3, capacitor C 6, resistance R 4, diode D1 and resistance R 5;
The power voltage terminal of the just very described first voltage time delay module of described electrochemical capacitor C1, first end of described capacitor C 2 connects the positive pole of described electrochemical capacitor C1, second end of described capacitor C 2 and the negative pole of described electrochemical capacitor C1 are connected to ground altogether, the supply voltage end of the just very described first voltage time delay module of described electrochemical capacitor C3, first end of described capacitor C 4 and the negative electrode of described Transient Suppression Diode ZD1 are connected to the positive pole of described electrochemical capacitor C3 altogether, second end of described capacitor C 4, the negative pole of the anode of described Transient Suppression Diode ZD1 and described electrochemical capacitor C3 is connected to ground altogether, first end of described resistance R 1 connects the positive pole of described electrochemical capacitor C1, second end of described resistance R 1 and first end of described resistance R 2 are connected to the input pin of described voltage delay process device U1 altogether, the grounding leg of second end of described resistance R 2 and described voltage delay process device U1 and first end of described capacitor C 5 are connected to ground altogether, second end of described capacitor C 5 connects the time-delay pin of described voltage delay process device U1, the power supply pin of described voltage delay process device U1 and first end of described resistance R 3 are connected to first end of described capacitor C 6 altogether, the second end ground connection of described capacitor C 6, the output pin of described voltage delay process device U1 and first end of described resistance R 4 are connected to the anode of described diode D1 altogether, the first empty pin of described voltage delay process device U1, the second empty pin and the equal sky of the 3rd empty pin connect, second end of described resistance R 3 and second end of described resistance R 4 are connected to the positive pole of described electrochemical capacitor C3 altogether, the negative electrode of described diode D1 is the output terminal of the described first voltage time delay module, and described resistance R 5 is connected between the negative electrode and ground of described diode D1.
5. PG signal-testing apparatus as claimed in claim 1 is characterized in that, the described second voltage time delay module comprises:
Capacitor C 7, capacitor C 8, resistance R 6, resistance R 7, Transient Suppression Diode ZD2, voltage delay process device U2, capacitor C 9, capacitor C 10, resistance R 8, capacitor C 11, resistance R 9, resistance R 10, diode D2 and resistance R 11;
First end of described capacitor C 7 and first end of described capacitor C 8 are respectively power voltage terminal and the supply voltage end of the described second voltage time delay module, second end of described capacitor C 7 and second end of described capacitor C 8 are connected to ground altogether, first end of described resistance R 6 and the negative electrode of described Transient Suppression Diode ZD2 are connected to first end of described capacitor C 7 altogether, second end of described resistance R 6 and first end of described resistance R 7 are connected to the input pin of described voltage delay process device U2 altogether, second end of described resistance R 7 and the anode of described Transient Suppression Diode ZD2, the grounding leg of described voltage delay process device U2, first end of described capacitor C 9, first end of described capacitor C 10 is connected to ground altogether, second end of described capacitor C 9 and second end of described capacitor C 10 are connected to the time-delay pin of described voltage delay process device U2 altogether, the power supply pin of described voltage delay process device U2 and first end of described resistance R 8 are connected to first end of described capacitor C 11 altogether, the second end ground connection of described capacitor C 11, first end of the output pin of described voltage delay process device U2 and first end of described resistance R 9 and described resistance R 10 is connected to the anode of described diode D2 altogether, second end of described resistance R 8 and second end of described resistance R 9 are connected to first end of described capacitor C 8 altogether, the first empty pin of described voltage delay process device U2, the second empty pin and the equal sky of the 3rd empty pin connect, the negative electrode of described diode D2 is the output terminal of the described second voltage time delay module, first end of described resistance R 11 connects the negative electrode of described diode D2, and second end of described resistance R 10 and second end of described resistance R 11 are connected to ground altogether.
6. PG signal-testing apparatus as claimed in claim 1 is characterized in that, described PG signal input module comprises:
Resistance R 12, capacitor C 12, resistance R 13, diode D3, diode D4 and resistance R 14;
The formed contact altogether of the anode of first end of described resistance R 12 and first end of described capacitor C 12 and described diode D4 is the input end of described PG signal input module, second end of described resistance R 12 connects the anode of described diode D3, second end of described capacitor C 12 and first end of described resistance R 13 are connected to ground altogether, the formed contact altogether of second end of described resistance R 13 and the negative electrode of described diode D3 is first output terminal of described PG signal input module, the negative electrode of described diode D4 is second output terminal of described PG signal input module, and described resistance R 14 is connected between the negative electrode and ground of described diode D4.
7. PG signal-testing apparatus as claimed in claim 1 is characterized in that, the described first signal comparison module comprises:
Comparer U3, resistance R 16 and diode D5;
The positive power source terminal of described comparer U3 is the power end of the described first signal comparison module, the inverting input of described comparer U3 and in-phase input end are respectively voltage input end and the PG signal input part of the described first signal comparison module, first end of the output terminal of described comparer U3 and described resistance R 16 is connected to the anode of described diode D5 altogether, the negative electrode of described diode D5 is the output terminal of the described first signal comparison module, and second end of described resistance R 16 and the negative power end of described comparer U3 are connected to ground altogether.
8. PG signal-testing apparatus as claimed in claim 1 is characterized in that, described secondary signal comparison module comprises:
Comparer U4, resistance R 18 and diode D6;
The positive power source terminal of described comparer U4 is the power end of described secondary signal comparison module, the in-phase input end of described comparer U4 and inverting input are respectively voltage input end and the PG signal input part of described secondary signal comparison module, first end of the output terminal of described comparer U4 and described resistance R 18 is connected to the anode of described diode D6 altogether, the negative electrode of described diode D6 is the output terminal of described secondary signal comparison module, and second end of described resistance R 18 and the negative power end of described comparer U4 are connected to ground altogether.
9. PG signal-testing apparatus as claimed in claim 1 is characterized in that, described indicator signal generation module comprises:
Resistance R 26, resistance R 27, voltage delay process device U5, capacitor C 17, capacitor C 18, resistance R 28, capacitor C 19 and resistance R 29;
First end of described resistance R 26 is the voltage input end of described indicator signal generation module, second end of described resistance R 26 and first end of described resistance R 27 are connected to the input pin of described voltage delay process device U5 altogether, the grounding leg of second end of described resistance R 27 and described voltage delay process device U5, first end of described capacitor C 17 and first end of described capacitor C 18 are connected to ground altogether, second end of described capacitor C 17 and second end of described capacitor C 18 are connected to the time-delay pin of described voltage delay process device U5 altogether, the power supply pin of described voltage delay process device U5 and first end of described resistance R 28 are connected to first end of described capacitor C 19 altogether, second end of described resistance R 28 is the standby voltage input end of described indicator signal generation module, the second end ground connection of described capacitor C 19, the output pin of described voltage delay process device U5 is the signal output part of described indicator signal generation module, and described resistance R 29 is connected between the output pin of second end of described resistance R 28 and described voltage delay process device U5.
10. PG signal-testing apparatus as claimed in claim 1 is characterized in that, described sound and light alarm module comprises:
Resistance R 19, NPN type triode Q1, positive-negative-positive triode Q2, capacitor C 15, resistance R 20, resistance R 21, LED 1, hummer BZ1, capacitor C 16, resistance R 22, resistance R 23, diode D7, resistance R 24, resistance R 25, NPN type triode Q3 and LED 2;
First end of described resistance R 19 is the control end of described sound and light alarm module, second end of described resistance R 19 and first end of described capacitor C 16 are connected to the base stage of described NPN type triode Q1 altogether, the collector and emitter of described NPN type triode Q1 connects base stage and the ground of described positive-negative-positive triode Q2 respectively, the collector of described positive-negative-positive triode Q2 and first end of described resistance R 22 are connected to first end of described capacitor C 16 altogether, the formed contact altogether of first end of first end of described capacitor C 15 and first end of described resistance R 20 and described resistance R 23 is the power end of described sound and light alarm module, the second end ground connection of described capacitor C 15, second end of described resistance R 20 and first end of described resistance R 21 are connected to the positive pole of described hummer BZ1 altogether, second end of described resistance R 21 connects the anode of described LED 1, the negative electrode of the negative pole of the negative electrode of described LED 1 and described hummer BZ1 and described diode D7 is connected to the emitter of described positive-negative-positive triode Q2 altogether, second end of the anode of described diode D7 and described resistance R 23 is connected to first end of described resistance R 24 altogether, second end of described resistance R 24 and first end of described resistance R 25 are connected to the base stage of described NPN type triode Q3 altogether, the emitter of second end of described resistance R 25 and described NPN type triode Q3, second end of described resistance R 22 and second end of described capacitor C 16 are connected to ground altogether, the negative electrode of described LED 2 connects the collector of described NPN type triode Q3, and the anode of described LED 2 is the indication drive end of described sound and light alarm module.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104101772A (en) * | 2013-04-08 | 2014-10-15 | 中国长城计算机深圳股份有限公司 | PG signal testing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104101772A (en) * | 2013-04-08 | 2014-10-15 | 中国长城计算机深圳股份有限公司 | PG signal testing apparatus |
| CN104101772B (en) * | 2013-04-08 | 2016-12-28 | 中国长城计算机深圳股份有限公司 | A kind of PG signal-testing apparatus |
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