CN110824211B - Signal source system - Google Patents
Signal source system Download PDFInfo
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- CN110824211B CN110824211B CN201911019093.1A CN201911019093A CN110824211B CN 110824211 B CN110824211 B CN 110824211B CN 201911019093 A CN201911019093 A CN 201911019093A CN 110824211 B CN110824211 B CN 110824211B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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Abstract
The invention discloses a signal source system, comprising: the reference signal source module is used for generating a precision reference signal; the filter circuit module is used for carrying out filter processing on the precision reference signal and outputting a single-path precision reference signal after the filter processing; the multi-channel signal module is used for converting the filtered single-channel precision reference signal into a pilot frequency signal of 20 channels and transmitting the pilot frequency signal to the signal driving module; the signal driving module is used for converting the received pilot frequency signals of the 20 channels into independent pilot frequency signals of the 20 channels according to the output requirement of the signal source; and the control module is used for carrying out overall control or split control on the output 20-channel independent pilot frequency signals. The signal source system disclosed by the invention has the advantages of comprehensive signal function, controllable signal quality, convenience in use of the signal source, low cost and the like.
Description
Technical Field
The invention relates to the technical field of integrated circuit test, in particular to a signal source system.
Background
When the device is tested and the burn-in test is carried out, an excitation signal is required to be provided for a tested and burn-in device, most of signal sources provided by various manufacturers at home and abroad are single-channel output, only 1-channel signal source can be provided, the signal source output provided by the famous instrument manufacturer is only 2-channel output, the highest output signal amplitude is only 10VPP, the driving capability of the signal source is only 300mA, at least 6 channels of pilot frequency signal sources are required for the burn-in test of a small-scale 14Pin digital circuit in full-function coverage, the burn-in test of a medium-scale digital circuit in high-function coverage requirements is carried out, the channel of the pilot frequency signal source is up to 16 channels, and the burn-in signal source amplitude is required to exceed 14V for a 4000 series circuit with high signal source amplitude of a complex large-scale device so as to meet the burn-in test conditions of the device.
Therefore, for devices such as HSSR8060 and the like with large loads and high requirements on signal source driving capacity, a conventional signal source cannot meet the burn-in test requirements at all, and the burn-in test with high coverage rate of functional design can be carried out only by designing a signal source with multi-channel output, high signal amplitude and high driving capacity.
Disclosure of Invention
The technical problem solved by the invention is as follows: the signal source system overcomes the defects of the prior art, has comprehensive signal functions, controllable signal quality, convenient use of a signal source and low cost.
The technical solution of the invention is as follows:
the invention discloses a signal source system, comprising: the device comprises a reference signal source module, a filter circuit module, a multi-channel signal module, a signal driving module and a control module;
the reference signal source module is used for generating a precision reference signal;
the filter circuit module is used for carrying out filter processing on the precision reference signal and outputting a single-path precision reference signal after the filter processing;
the multi-channel signal module is used for converting the filtered single-channel precision reference signal into a pilot frequency signal of 20 channels and transmitting the pilot frequency signal to the signal driving module;
the signal driving module is used for converting the received pilot frequency signals of the 20 channels into independent pilot frequency signals of the 20 channels according to the output requirement of the signal source;
and the control module is used for carrying out overall control or split control on the output 20-channel independent pilot frequency signals.
Compared with the prior art, the invention has the advantages that:
the invention discloses a signal source system, which meets the following characteristics: the number of channels of the pilot frequency signal output by the signal source is as follows: 20, the conventional signal source only has 1 channel or 2 channels for output; signal source single channel drive current range: 0-1A, the conventional signal driving capability is only about 300 mA; signal source single channel drive voltage range: 0-15V, and the conventional signal voltage driving capability is only about 10V; signal source output frequency range: 0-10 MHz; the signal source has the overvoltage and overcurrent protection function. Therefore, the signal source system has the advantages of comprehensive signal function, controllable signal quality, convenience in using the signal source, low cost and the like.
Drawings
FIG. 1 is a block diagram of a signal source system according to the present invention;
FIG. 2 is a block diagram of a reference signal source module according to the present invention;
FIG. 3 is a block diagram of a filter circuit module according to the present invention;
FIG. 4 is a block diagram of a multi-channel signal module according to the present invention;
FIG. 5 is a block diagram of a signal driving module according to the present invention;
fig. 6 is a block diagram of a power module according to the present invention.
Detailed Description
Referring to fig. 1, a block diagram of a signal source system according to the present invention is shown. The signal source system comprises: the device comprises a reference signal source module, a filter circuit module, a multi-channel signal module, a signal driving module and a control module;
the reference signal source module is used for generating a precision reference signal;
the filter circuit module is used for carrying out filter processing on the precision reference signal and outputting a single-path precision reference signal after the filter processing;
and the multi-channel signal module is used for converting the filtered single-channel precision reference signal into a pilot frequency signal of 20 channels and transmitting the pilot frequency signal to the signal driving module. The signal driving module is used for converting the received pilot frequency signals of 20 channels into independent pilot frequency signals of 20 channels according to the output requirement of a signal source; and the control module is used for carrying out overall control or split control on the output 20-channel independent pilot frequency signals.
Optionally, the independent pilot frequency signals of 20 channels satisfy the following conditions: the output amplitude can be independently set, and the single-channel driving capability exceeds 1A.
Optionally, in this embodiment, the signal source system may further include: the power supply module is used for providing working power supply for the signal source system and each working module; the system overvoltage and overcurrent protection module is used for monitoring the working voltage and the working current of each module in the signal source system, and performing overvoltage or overcurrent protection when the working voltage or the working current is abnormal so as to avoid the working condition of the signal source system caused by overvoltage or overcurrent of each module.
Referring to fig. 2, a block diagram of a reference signal source module according to the present invention is shown. The reference signal source module includes: a first capacitor C1, a second capacitor C2 and a precision crystal oscillator. The first capacitor C1 and the second capacitor C2 are connected in parallel and then connected into a precision crystal oscillator: the input ends of the first capacitor C1 and the second capacitor C2 are connected with the power input end of the Pin8 of the precision crystal oscillator, and the output end is connected with the grounding end of the Pin4 of the precision crystal oscillator. The capacitance values of the first capacitor C1 and the second capacitor C2 are 0.01uF and 0.1uF respectively.
Referring to fig. 3, a block diagram of a filter circuit module according to the present invention is shown. The filter circuit module includes: a filter resistor R and a Schmitt trigger connected in series. The filtering circuit module carries out filtering processing on the precise reference signal through the filtering resistor R and the Schmidt trigger which are connected in series, so that burrs, peaks and harmonic components are eliminated, and the output waveform is more ideal. Optionally, the resistance of the filter resistor R is 200 Ω.
Referring to fig. 4, a block diagram of a multi-channel signal module of the present invention is shown. The multi-channel signal module includes: a first counter U1 and a second counter U2 in series. The multi-channel signal module converts the single-channel precision reference signal into a 20-channel pilot frequency signal through the first counter U1 and the second counter U2, and can provide a signal channel increase by 20 times. The pilot frequency signal of 20 channels is consistent with the signal form, amplitude and duty ratio of the single-channel precision reference signal; the frequency of the pilot frequency signals of 20 channels is decreased in sequence, and the frequency of the pilot frequency signal of the current channel is half of the frequency of the pilot frequency signal of the previous channel.
Referring to fig. 5, a block diagram of a signal driving module according to the present invention is shown. The signal driving module includes: the signal driving module includes: a series of 20 drivers (e.g., MOSFET drivers). The signal driving module respectively drives and promotes and outputs amplitude adjustment to the 20 corresponding channels of independent pilot frequency signals through the 20 serially connected drivers, outputs the 20 channels of independent pilot frequency signals, and enables the amplitudes of the 20 output channels of independent pilot frequency signals to meet the output requirements of the signal source.
Referring to fig. 6, a block diagram of a power module according to the present invention is shown. The power module can be according to system's demand and device module lectotype design, and the system internal requirement power has: 5.0V, 10V, 12V, 15V and 18V. The three groups of 5.0V power supplies are used for supplying power to the precision crystal oscillator, the Schmidt trigger and the multi-channel signal module, and the relay, the system overvoltage and overcurrent protection module and the control module respectively; the 10V power supply, the 12V power supply, the 15V power supply and the 18V power supply respectively supply power to the system overvoltage and overcurrent protection module and the 20-way driver in groups. It should be noted that, for analog power supply, isolation voltage stabilization or output after passing through the LDO power supply is required.
Optionally, in this embodiment, the control module includes: and the relays are used for controlling the reference signal source module, the filter circuit module, the multi-channel signal module, the signal driving module, the power supply module and the system overvoltage and overcurrent protection module. The control module is realized by a plurality of relays: the control method comprises the steps of generation control of a precision reference signal, signal filtering control, signal frequency division control, signal driving control, reference signal generation control, signal filtering control, signal frequency division control, signal driving component control, signal output control, power distribution control and overvoltage and overcurrent protection control.
Optionally, in this embodiment, the system overvoltage and overcurrent protection module includes: the protection circuit comprises an overvoltage protection circuit, an overcurrent protection circuit and an overtemperature protection circuit. The overvoltage protection circuit adopts a feedback type voltage monitoring submodule, when the power supply voltage of any module under a signal source system exceeds a voltage threshold value set by the system, the voltage monitoring submodule generates an overvoltage signal, the overvoltage signal cuts off the signal and the power supply voltage of any module by controlling a relay corresponding to any module, and the problem of system burnout caused by abnormal power supply voltage of any module is prevented. The overcurrent protection circuit adopts a feedback type overcurrent monitoring submodule, when the power supply overcurrent of any module under a signal source system exceeds a current threshold value set by the system, the overcurrent monitoring submodule generates an overcurrent signal, and the overcurrent signal cuts off the signal and the power supply voltage of any module by controlling a relay corresponding to any module, so that the problem of system burnout caused by abnormal power supply current of any module is prevented. The over-temperature protection circuit adopts an over-temperature monitoring submodule which is arranged in each module under a signal source system and used for monitoring the temperature change condition of each module under the signal source system in real time, when the temperature of any module under the signal source system exceeds a temperature threshold value set by the system, the over-temperature monitoring submodule generates an over-temperature signal, and the over-temperature signal cuts off the input signal and the power supply voltage of any module by controlling a relay corresponding to any module, so that the problem of system burnout caused by abnormal over-temperature limit of any module is prevented.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (9)
1. A signal source system, comprising: the device comprises a reference signal source module, a filter circuit module, a multi-channel signal module, a signal driving module and a control module;
the reference signal source module is used for generating a precision reference signal;
the filter circuit module is used for carrying out filter processing on the precision reference signal and outputting a single-path precision reference signal after the filter processing;
the multi-channel signal module is used for converting the filtered single-channel precision reference signal into a pilot frequency signal of 20 channels and transmitting the pilot frequency signal to the signal driving module;
the signal driving module is used for converting the received pilot frequency signals of the 20 channels into independent pilot frequency signals of the 20 channels according to the output requirement of the signal source;
the control module is used for carrying out overall control or split control on the output 20-channel independent pilot frequency signals;
the multi-channel signal module includes: a first counter U1 and a second counter U2 connected in series; the multi-channel signal module converts the single-path precision reference signal into a pilot frequency signal of 20 channels through a first counter U1 and a second counter U2, and can increase the number of the signal channels by 20 times; the pilot frequency signal of 20 channels is consistent with the signal form, amplitude and duty ratio of the single-channel precision reference signal; the frequency of the pilot frequency signals of 20 channels is decreased in sequence, and the frequency of the pilot frequency signal of the current channel is half of the frequency of the pilot frequency signal of the previous channel.
2. The signal source system of claim 1, wherein the 20 channels of independent pilot signals satisfy the following condition: the output amplitude can be independently set, and the single-channel driving capability exceeds 1A.
3. The signal source system of claim 1, further comprising: and the power supply module is used for providing working power supply for the signal source system and each working module.
4. The signal source system of claim 3, further comprising: the system overvoltage and overcurrent protection module is used for monitoring the working voltage and the working current of each module in the signal source system, and performing overvoltage or overcurrent protection when the working voltage or the working current is abnormal so as to avoid the working condition of the signal source system caused by overvoltage or overcurrent of each module.
5. The signal source system of claim 1, wherein the reference signal source module comprises: the first capacitor C1, the second capacitor C2 and the precision crystal oscillator; the first capacitor C1 and the second capacitor C2 are connected in parallel and then are connected to a precision crystal oscillator; the capacitance value of the first capacitor C1 and the capacitance value of the second capacitor C2 are 0.1 uF.
6. The signal source system of claim 1, wherein the filter circuit module comprises: the filter circuit module carries out filtering processing on the precision reference signal through the filter resistor R and the Schmitt trigger which are connected in series, and burrs, peaks and harmonic components are eliminated; wherein, the resistance value of the filter resistor R is 200 omega.
7. The signal source system of claim 1, wherein the signal driving module comprises: the signal driving module includes: 20 drivers in series; the signal driving module respectively drives and promotes and outputs amplitude adjustment to the 20 corresponding channels of independent pilot frequency signals through the 20 serially connected drivers, outputs the 20 channels of independent pilot frequency signals, and enables the amplitudes of the 20 output channels of independent pilot frequency signals to meet the output requirements of the signal source.
8. The signal source system of claim 4, wherein the control module comprises: the system comprises a reference signal source module, a filter circuit module, a multi-channel signal module, a signal driving module, a power supply module and a system overvoltage and overcurrent protection module, wherein the reference signal source module, the filter circuit module, the multi-channel signal module, the signal driving module, the power supply module and the system overvoltage and overcurrent protection module are respectively connected with a plurality of relays; the control module is realized by a plurality of relays: the control method comprises the steps of generation control of a precision reference signal, signal filtering control, signal frequency division control, signal driving control, reference signal generation control, signal filtering control, signal frequency division control, signal driving component control, signal output control, power distribution control and overvoltage and overcurrent protection control.
9. The signal source system of claim 8, wherein the system overvoltage overcurrent protection module comprises: the over-voltage protection circuit, the over-current protection circuit and the over-temperature protection circuit; the overvoltage protection circuit adopts a feedback type voltage monitoring submodule, when the power supply voltage of any module under a signal source system exceeds a voltage threshold value set by the system, the voltage monitoring submodule generates an overvoltage signal, the overvoltage signal cuts off the signal and the power supply voltage of any module by controlling a relay corresponding to any module, and the problem of system burnout caused by abnormal power supply voltage of any module is prevented; the overcurrent protection circuit adopts a feedback type overcurrent monitoring sub-module, when the power supply overcurrent of any module under a signal source system exceeds a current threshold value set by the system, the overcurrent monitoring sub-module generates an overcurrent signal, and the overcurrent signal cuts off the signal and the power supply voltage of any module by controlling a relay corresponding to any module, so that the problem of system burnout caused by abnormal power supply current of any module is prevented; the over-temperature protection circuit adopts an over-temperature monitoring submodule which is arranged in each module under a signal source system and used for monitoring the temperature change condition of each module under the signal source system in real time, when the temperature of any module under the signal source system exceeds a temperature threshold value set by the system, the over-temperature monitoring submodule generates an over-temperature signal, and the over-temperature signal cuts off the input signal and the power supply voltage of any module by controlling a relay corresponding to any module, so that the problem of system burnout caused by abnormal over-temperature limit of any module is prevented.
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| CN201911019093.1A CN110824211B (en) | 2019-10-24 | 2019-10-24 | Signal source system |
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