Integrated Circuit Self-Proofreading OTP Memory Voltage Generation
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Solution Overview
Problem
Conventional integrated circuits for measuring devices require a cumbersome proofreading process involving external EEPROMs, increasing system cost and complexity due to the need for multiple voltage sources and external memory access.
Innovation Solution
An integrated circuit with a self-proofreading function, incorporating a one-time programmable (OTP) memory, an electrical charge pump, and a switching circuit, which allows for internal voltage generation and storage of proofreading parameters without external power sources, reducing the need for external EEPROMs and voltage sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external EEPROM is used to store proofreading parameters, then the proofreading function can be implemented, but the system complexity and cost increase due to requiring external memory and multiple voltage sources
Solution Approach 1:
The patent combines the proofreading parameter storage function directly into the IC chip by integrating an OTP memory array with the MCU, eliminating the need for external EEPROM. The OTP memory is built-in and directly accessible by the MCU, merging what were previously separate components into a single integrated unit.
Solution Approach 2:
The IC chip is designed to perform multiple functions including sensing, ADC conversion, MCU processing, and proofreading parameter storage within a single device. The built-in OTP memory serves both as program storage and proofreading parameter storage, reducing the need for separate external components.
2Reliability
If an external EEPROM is used for storing proofreading parameters, then the parameters can be stored, but additional voltage sources are required increasing power supply complexity
Solution Approach 1:
The patent merges the power supply system by using a single voltage source (VDD) that is shared across all components including the OTP memory, MCU, and ADC. This eliminates the need for separate voltage sources that would be required by external EEPROM, simplifying the power supply architecture.
3Reliability
If external EEPROM and serial interface circuit are used, then proofreading parameters can be accessed, but the cost of the measuring system increases
Solution Approach 1:
The patent eliminates the need for external EEPROM and serial interface circuits by integrating the OTP memory directly into the IC chip. The MCU can access proofreading parameters directly from the built-in OTP memory through internal buses, removing the need for external memory devices and their associated interface circuits, thereby reducing system cost.
4Reliability
If proofreading parameters are stored in external memory, then the IC can function, but the device requires more external components increasing overall device area
Solution Approach 1:
The patent integrates the OTP memory array, MCU, ADC, and sensor elements into a single IC chip structure. This consolidation eliminates the need for external memory devices and reduces the overall device area by combining multiple functional blocks that would otherwise require separate components and additional interconnection space.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution simplifies the proofreading procedure, reduces system costs, and enhances operational efficiency by eliminating the need for external power sources and memory, while allowing flexible parameter storage within the IC.
Implementation Method 1
an electrical charge pump having an output port and an enable port connected to the MCU, and a switching circuit having a control port connected to the MCU; a first input port connected to the output port of the electrical charge pump, a second input port connected to a power source of the MCU, and an output port connected to the OTP memory to provide an operating voltage and a recording voltage for the OTP memory
Data Source
AI summary
An integrated circuit (IC) includes a micro control unit (MCU), a one-time programmable (OTP) memory directly connected with the MCU, an electrical charge pump having an output port and an enable port connected to the MCU, and a switching circuit having a control port connected to the MCU, a first input port connected to the output port of the electrical charge pump, a second input port connected to a power source of the MCU, and an output port connected to the OTP memory to provide an operating voltage and a recording voltage for the OTP memory. Because the OTP memory can choose the operating voltage or the recording voltage, a measuring apparatus using this IC doesn't need an external power source to provide a VDD voltage being 5.8 volts. Therefore, a power consuming of the IC can be reduced.