Electrical Fuse Device Program Clock Control Circuit
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Solution Overview
Problem
Conventional electrical fuse devices are prone to erroneous execution due to noise or surge, leading to unrepairable damage, as they lack effective control mechanisms to prevent program execution during non-execution modes.
Innovation Solution
The introduction of a program clock control circuit and a program mode control circuit, along with an optional counter circuit, to synchronize and control the program clock signal and program data transmission, ensuring that the program is only executed when intended, thereby preventing erroneous executions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrical fuse devices are used without additional control circuits, then the device complexity is low, but the reliability against noise and surge is poor
Solution Approach 1:
The patent introduces a program clock control circuit as an intermediary component that mediates between the external program clock signal and the internal program execution mechanism. This control circuit acts as a gatekeeper, preventing direct coupling between external noise/surge and the fuse element, thereby improving reliability while adding controlled complexity
Solution Approach 2:
The program clock control circuit performs preliminary validation and control of the program clock signal before it can trigger program execution. By checking control signals and managing clock distribution in advance, the system prevents erroneous execution due to noise or surge, addressing the reliability issue before it manifests
2Reliability
If the program clock control circuit is added to prevent erroneous execution, then the reliability improves, but the device complexity increases
Solution Approach 1:
The control function is segmented into distinct modular components: the program clock control circuit, shift registers, and fuse core units. Each segment performs a specific function (clock management, data shifting, fuse control), which isolates complexity into manageable units while maintaining overall system reliability
Solution Approach 2:
The program clock control circuit serves multiple functions: it generates program clock signals, manages timing synchronization, controls program execution timing, and provides noise immunity. By consolidating these functions into a single multi-functional control unit, the patent improves reliability without proportionally increasing overall device complexity
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 configuration significantly enhances the durability of electrical fuse devices against noise and surge, ensuring reliable operation by preventing unintended program execution and maintaining the fuse elements in a programmable or non-programmable state as required.
Implementation Method 1
An electrical fuse element is serially connected to a bipolar transistor, in which a process, such as 'blowing' and 'silicidization ', is carried out by allowing a relatively large electrical current of about 1 ampere to flow through the bipolar transistor
Implementation Method 2
the reference symbol Q denotes a switching element comprising a PMOS transistor, serially connected to the electrical fuse element F
Data Source
AI summary
The invention provides an electrical fuse device comprising: a plurality of fuse cores, each having an electrical fuse element and a switching element serially connected to the electrical fuse element; a program control circuit generating a program shift signal by sequentially shifting a program control transmission signal in synchronization with an effective program clock signal and subsequently generating a program signal to be sent to each of the switching elements in the plurality of fuse cores based on program data and the program shift signal; and a program clock control circuit controlling the conducting and non-conducting states of a program clock signal in accordance with a program clock enable signal and, when the program clock signal is in a conducting state, transmitting the program clock signal to the program control circuit as the effective program clock signal.