CN106936401B - Programmable high-performance operational amplifier after packaging - Google Patents
Programmable high-performance operational amplifier after packaging Download PDFInfo
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- CN106936401B CN106936401B CN201710157811.6A CN201710157811A CN106936401B CN 106936401 B CN106936401 B CN 106936401B CN 201710157811 A CN201710157811 A CN 201710157811A CN 106936401 B CN106936401 B CN 106936401B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/002—Control of digital or coded signals
Abstract
The invention discloses a packaged programmable high-performance operational amplifier which comprises a chip body, an external test circuit module, an external data selection module and an external clock, wherein the chip body consists of a power supply, an operational amplifier body, a shift register and a reset circuit module, the output ends of the external data selection module and the external clock are connected with a positive input pin and a negative input pin of the operational amplifier body, and the output ends of the external data selection module and the external clock are respectively connected with two switches. The packaged programmable high-performance operational amplifier achieves the aim of producing products with different models and performances on the same set of photomask by improving the interior of the chip body under the combined action of the external test circuit module, the external data selection module, the external clock, the operational amplifier body, the switch, the shift register and the reset circuit module, thereby greatly reducing the research and development cost of the chip.
Description
Technical Field
The invention relates to the technical field of operational amplifiers, in particular to a packaged programmable high-performance operational amplifier.
Background
Operational amplifiers are widely used in consumer electronics, communication equipment, industrial control systems, and medical devices. Because the application fields of operational amplifiers are very wide, each application has different requirements on the performance of the operational amplifier, for example, an operational amplifier with a unit gain bandwidth of about 12MHz is required on an electronic whiteboard, an operational amplifier with a unit gain bandwidth of about 500KHz is required on an electric tool, and the like, basically, each operational amplifier with a unit gain bandwidth has a certain application market, and research and development companies need to research, develop and produce the operational amplifier with each bandwidth for different system applications. Some applications have requirements on not only the unit gain bandwidth of the operational amplifier but also the precision of the input bias voltage, so that the operational amplifier of each bandwidth may need different input bias voltages, and thus, the types of operational amplifier chips in the market are various, and if each operational amplifier needs a separate tape, the research and development cost and the production and management cost of the operational amplifier research and development enterprise are high.
Although each application system has different technical and performance requirements on the operational amplifier, the structure and most internal devices are the same for the operational amplifier with the same type and different bandwidths, different performances can be achieved only by locally fine-adjusting parameters of certain internal devices, and the parts needing local fine-adjustment can be connected and disconnected by using switches to meet the performance requirements of different systems on the operational amplifier. The prior art realizes the connection or disconnection of a switch by changing a metal connecting wire at the topmost layer or repairs and adjusts the switch before packaging, so that different photomask plates are required to be produced according to different operational amplifier performances during chip production, high research and development and production costs are caused, meanwhile, in order to distinguish different photomask versions, certain difficulty is brought to material management of enterprises, if the repair and adjustment are carried out before packaging, extra repair and adjustment pins are required, and the test cost is increased while the area is increased.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a packaged programmable high-performance operational amplifier which has the characteristic that after the operational amplifier is packaged, a switch data program is written into a chip according to the performance requirement of an application system on the operational amplifier, so that the application requirement of the system is met, and the problem that different photomask plates are produced according to different operational amplifier performances during chip production in the background art is solved.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a packaged programmable high-performance operational amplifier comprises a chip body, an external test circuit module, an external data selection module and an external clock, wherein the chip body consists of a power supply, an operational amplifier body, a shift register and a reset circuit module, the output ends of the external data selection module and the external clock are connected with a positive input pin and a negative input pin of the operational amplifier body, the output ends of the external data selection module and the external clock are respectively connected with two switches in parallel, the output ends of the switches are connected with the input end of the shift register, the output end of the shift register is connected with the input end of the operational amplifier body, the output end of the power supply is respectively connected with the input ends of the reset circuit module and the operational amplifier body, the output end of the reset circuit module is connected with the input end of the shift register, and the output end of the external test circuit module is connected with the input end of the external data selection module.
Preferably, the reset circuit module can reset the shift register and simultaneously open the switches connected with the positive input pin and the negative input pin when the whole chip is powered on.
Preferably, the operational amplifier body is composed of a basic amplifier and a plurality of redundant transistors, resistors and capacitors.
Preferably, the output end of the operational amplifier body is connected with the input end of an external device.
A packaged programmable high performance operational amplifier, comprising the implementation steps of:
s1: after power-on, the reset circuit clears all data stored in the shift register, and switches connected with the positive input pin and the negative input pin of the operational amplifier body are opened, so that the positive input pin of the operational amplifier body and the negative input pin of the operational amplifier body are connected with the internal digital control part, wherein the negative input pin of the operational amplifier body is connected to the clock control end of the shift register through the switch, and the positive input pin of the operational amplifier body is connected to the data input end of the shift register through the switch;
s2: the shift register shifts data into the shift register in series under the coordination of a clock, when all data in the shift register are updated, switches connected with a positive input pin and a negative input pin are closed, and the whole chip completely enters a simulation state;
s3: the test proves whether the written data meets the requirement, because the switch connected with the input pin is in the closed state, the test environment at the moment is the same as that of the normal operational amplifier body, if the test result shows that the state at the moment does not meet the application requirement, the first step and the second step are executed again, and new data is rewritten until the written data meets the application requirement;
s4: when the test finds the data which is in accordance with the application, the data is written into the shift register, and a trimming instruction is sent to the digital logic control part, the trimming instruction can blow or keep the fuse as it is according to the data stored in the shift register, and the switch connected with the input pin is closed permanently, and then when the chip is powered on again, the two switches are also kept in the closed state.
(III) advantageous effects
The invention provides a programmable high-performance operational amplifier after packaging. The method has the following beneficial effects:
the packaged programmable high-performance operational amplifier has the characteristic that after the operational amplifier is packaged, a switch data program is written into a chip according to the performance requirement of an application system on the operational amplifier, so that the application requirement of the system is met, the problem that different photomask plates are produced according to different operational amplifier performances when a chip is produced in the background technology is solved, products with different models and performances can be produced on the same photomask through the combined action of an external test circuit module, an external data selection module, an external clock, an operational amplifier body, a switch, a shift register and a reset circuit module by improving the interior of a chip body, so that the research and development cost of the chip is greatly reduced, the operation and material management cost of research and development enterprises can also be greatly reduced, and the research and development enterprises can write different programs into the operational amplifier according to market requirements, to meet the order requirements of different customers.
Drawings
FIG. 1 is a schematic system diagram of an operational amplifier of the present invention;
FIG. 2 is a flowchart illustrating the programming of an operational amplifier according to the present invention.
In the figure: 1 chip body, 2 power supplies, 3 external test circuit modules, 4 external data selection modules, 5 external clocks, 6 operational amplifier bodies, 7 switches, 8 shift registers and 9 reset circuit modules.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a high performance operational amplifier able to programme after encapsulation, including chip body 1, external test circuit module 3, external data selection module 4 and external clock 5, chip body 1 is by power 2, operational amplifier body 6, shift register 8, and reset circuit module 9 are constituteed, the output of external data selection module 4 and external clock 5 all is connected with the positive input pin and the negative input pin of operational amplifier body 6, the output of external data selection module 4 and external clock 5 is respectively with two switch 7 parallel connection, the output of switch 7 is connected with the input of shift register 8, the output of shift register 8 is connected with the input of operational amplifier body 6, the output of power 2 is connected with the input of reset circuit module 9 and operational amplifier body 6 respectively, reset circuit module 9 can reset shift register 8 and open simultaneously when whole chip circular telegram and just input pin and negative input pin are connected The output end of the reset circuit module 9 is connected with the input end of the shift register 8, and the output end of the external test circuit module 3 is connected with the input end of the external data selection module 4.
The operational amplifier body 6 consists of a basic amplifier and a plurality of redundant transistors, resistors and capacitors, and the output end of the operational amplifier body 6 is connected with the input end of external equipment; by controlling the connection or disconnection of these redundant transistors, resistors and capacitors, an already optimized operational amplifier can be realized.
Multiplexing a positive input pin and a negative input pin of the operational amplifier body 6, and writing required information in a test link according to application requirements after the operational amplifier and the chip stream chip are packaged; when the positive input pin and the negative input pin of the operational amplifier body 6 are just powered on, the two input pins are set to be in a digital mode through an internal control circuit, so that one input pin can input a clock into a chip, the other input pin can transmit required configuration information into the chip under the control of the clock, after the required information is completely written in, a switch for enabling the two input pins to enter the digital mode is completely disconnected, and in later practical application, the two input pins cannot enter the digital mode again during power-on, and only can work in an analog state like a normal operational amplifier chip.
A packaged programmable high performance operational amplifier, comprising the implementation steps of:
s1: after power-on, the reset circuit clears all data stored in the shift register 8, and opens the switch 7 connected with the positive input pin and the negative input pin of the operational amplifier body 6, so that the positive input pin of the operational amplifier body 6 and the negative input pin of the operational amplifier body 6 are connected with the internal digital control part, wherein the negative input pin of the operational amplifier body 6 is connected with the clock control end of the shift register 8 through the switch 7, and the positive input pin of the operational amplifier body 6 is connected with the data input end of the shift register 8 through the switch 7;
s2: the shift register 8 shifts data into the shift register 8 in series under the coordination of a clock, when all data in the shift register 8 are updated, the switch 7 connected with the positive input pin and the negative input pin is closed, and the whole chip completely enters an analog state;
s3: the test proves whether the written data meets the requirement, because the switch 7 connected with the input pin is in the closed state, the test environment at the moment is the same as that of the normal operational amplifier body 6, if the test result shows that the state at the moment does not meet the application requirement, the first step and the second step are executed again, and new data is written again until the written data meets the application requirement;
s4: after the test finds the data which is in line with the application, the data is written into the shift register 8, and a trimming instruction is sent to the digital logic control part, the trimming instruction will blow or keep the Fuse according to the data stored in the shift register 8, and the switch 7 connected with the input pin is closed permanently, and then when the chip is powered on again, the two switches 7 are also kept in the closed state, and the operation amplifier chip blows the Fuse to control the switch to be connected or disconnected after the packaging is completed, which is not the prior art which needs to be completed before the packaging.
To sum up, the packaged programmable high-performance operational amplifier has the characteristics that after the operational amplifier is packaged, a switch data program is written into a chip according to the performance requirement of an application system on the operational amplifier, so that the application requirement of the system is met, the problem that different photomask plates are produced according to different operational amplifier performances during chip production in the background art is solved, products with different models and performances can be produced on the same photomask through the improvement on the interior of a chip body 1 under the combined action of an external test circuit module 3, an external data selection module 4, an external clock 5, an operational amplifier body 6, a switch 7, a shift register 8 and a reset circuit module 9, so that the research and development cost of the chip is greatly reduced, and the operation and material management cost of enterprises can also be greatly reduced, research and development enterprises can write different programs into the operational amplifier according to market demands so as to meet the order requirements of different customers.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a high performance operational amplifier able to programme after encapsulation, includes chip body (1), external test circuit module (3), external data selection module (4) and external clock (5), its characterized in that: the chip body (1) is composed of a power supply (2), an operational amplifier body (6), a shift register (8) and a reset circuit module (9), the output ends of an external data selection module (4) and an external clock (5) are connected with a positive input pin and a negative input pin of the operational amplifier body (6), the output ends of the external data selection module (4) and the external clock (5) are respectively connected with two switches (7) in parallel, the output ends of the switches (7) are connected with the input end of the shift register (8), the output end of the shift register (8) is connected with the input end of the operational amplifier body (6), the output end of the power supply (2) is respectively connected with the input ends of the reset circuit module (9) and the operational amplifier body (6), the output end of the reset circuit module (9) is connected with the input end of the shift register (8), the output end of the external test circuit module (3) is connected with the input end of the external data selection module (4).
2. The packaged programmable high performance operational amplifier of claim 1, wherein: the reset circuit module (9) can reset the shift register (8) when the whole chip is powered on and simultaneously open the switch (7) connected with the positive input pin and the negative input pin.
3. The packaged programmable high performance operational amplifier of claim 1, wherein: the operational amplifier body (6) is composed of a basic amplifier and a plurality of redundant transistors, resistors and capacitors.
4. The packaged programmable high performance operational amplifier of claim 1, wherein: the output end of the operational amplifier body (6) is connected with the input end of external equipment.
5. A packaged programmable high performance operational amplifier, comprising the steps of: s1: after power-on, the reset circuit clears all data stored in the shift register (8), and opens a switch (7) connected with a positive input pin and a negative input pin of the operational amplifier body (6), so that the positive input pin of the operational amplifier body (6) and the negative input pin of the operational amplifier body (6) are connected with an internal digital control part, wherein the negative input pin of the operational amplifier body (6) is connected with a clock control end of the shift register (8) through the switch (7), and the positive input pin of the operational amplifier body (6) is connected with a data input end of the shift register (8) through the switch (7); s2: the shift register (8) shifts data into the shift register (8) in series under the coordination of a clock, when all data in the shift register (8) are updated, the switch (7) connected with the positive input pin and the negative input pin is closed, and the whole chip completely enters an analog state; s3: the test proves whether the written data meets the requirement, because the switch (7) connected with the input pin is in a closed state, the test environment at the moment is the same as that of the normal operational amplifier body (6), if the test result shows that the state at the moment does not meet the application requirement, the first step and the second step are executed again, and new data is written again until the written data meets the application requirement; s4: when the test finds data that is in line with the application, this data is written into the shift register (8) and a trimming instruction is issued to the digital logic control part, which will blow or leave the fuse intact according to the data stored in the shift register (8) and permanently close the switch (7) to which the input pin is connected, after which the two switches (7) remain closed when the chip is powered on again.
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| CN106936401B true CN106936401B (en) | 2021-06-29 |
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