Semiconductor Memory Sense Amplifier Driving Control
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Solution Overview
Problem
In semiconductor memory apparatuses, the initial application of external voltage can lead to uninitialized voltage levels of sense amplifier driving signals, causing current paths to form and resulting in unexpected current consumption.
Innovation Solution
A semiconductor memory apparatus with a sense amplifier driving control unit that generates and manages sense amplifier driving signals in response to enable and power-up signals, ensuring that the sense amplifier driving nodes maintain the same voltage level or are disconnected to prevent current paths, using a pumping voltage higher than the external voltage to prevent voltage drops and transistor activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sense amplifier driving signals are not initialized when external voltage is applied, then the semiconductor memory apparatus can operate with simple initialization logic, but current paths form causing unexpected current consumption
Solution Approach 1:
The patent applies preliminary action by initializing the sense amplifier driving signals to a predetermined voltage level before the external voltage is fully applied to the semiconductor memory apparatus. The power-up detection circuit detects when external voltage is applied and generates a power-up detection signal that triggers initialization of the driving signals (SAP, SAN, SAPCG) to prevent unintended transistor activation and current path formation during voltage transition periods
2Ease of operation
If the sense amplifier driving nodes are connected to apply different voltage levels, then the sense amplifier can function properly for data sensing, but current paths form causing unexpected current consumption
Solution Approach 1:
The patent applies preliminary anti-action by preventing the formation of current paths through proper sequencing of voltage application. The power-up detection circuit ensures that the sense amplifier driving signals are initialized to safe voltage levels before enabling full operation, and the control logic prevents simultaneous activation of transistors that would create current paths between different voltage potentials
3Speed
If the transistors are enabled during voltage initialization, then the sense amplifier driving unit can respond quickly to enable signals, but current paths form causing unexpected current consumption
Solution Approach 1:
The patent applies preliminary action by initializing the sense amplifier driving signals to predetermined voltage levels before the external voltage is fully stabilized. This ensures that when transistors are subsequently enabled in response to enable signals, they operate with properly initialized control signals, preventing unintended current paths while maintaining quick response capability
Data Source
AI summary
A semiconductor memory apparatus includes a sense amplifier driving control unit configured to be applied with first and second driving voltages, and generate first to third sense amplifier driving signals in response to a mat enable signal, a sense amplifier enable signal and a power-up signal; a sense amplifier driving unit configured to, in response to the first to third sense amplifier driving signals, connect first and second sense amplifier driving nodes to cause the first and second sense amplifier driving nodes to have substantially the same voltage level, or disconnect the first and second sense amplifier driving nodes to apply first and second sense amplifier driving voltages to the first and second sense amplifier driving nodes; and a sense amplifier configured to be applied with the first and second sense amplifier driving voltages, and sense and amplify a voltage difference of a bit line and a bit line bar.