Signal Generator Feedback Loop for Memory Page Buffer
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Solution Overview
Problem
Memory devices face challenges in generating accurate signals for controlling page buffers, leading to potential reliability issues due to variations in sensing signals and common sensing signals, which can affect data sensing and storage operations.
Innovation Solution
A signal generator is designed with a first amplifier, a divider circuit, and a buffer group to output page control signals, utilizing a feedback loop to generate amplified and divided voltages, ensuring consistent levels of sensing and common sensing signals to stabilize signal output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional signal generation methods are used, then device complexity is reduced, but signal level consistency deteriorates leading to reliability issues
Solution Approach 1:
The patent implements a feedback mechanism where a portion of the output signal from the buffer group is fed back to the non-inverting input of the operational amplifier through a voltage divider circuit. This feedback loop automatically adjusts the amplified voltage to maintain consistent output signal levels across different operating conditions, thereby improving signal consistency and reliability without requiring manual calibration or complex external control systems.
Solution Approach 2:
The signal generator is designed to be self-regulating through the feedback mechanism. The operational amplifier automatically adjusts its output based on the feedback signal and reference voltage, enabling the system to self-correct signal level variations without external intervention. This self-service capability maintains signal consistency while keeping the device structure relatively simple and autonomous.
2Measurement precision
If signal levels are not stabilized, then device complexity remains low, but sensing accuracy deteriorates
Solution Approach 1:
The feedback loop using the voltage divider and operational amplifier continuously monitors and adjusts the signal levels to maintain precision. This ensures that sensing signals and common sensing signals remain at consistent levels, directly improving sensing accuracy by compensating for variations in amplifier gain, supply voltage, or load conditions without requiring complex external calibration equipment.
Solution Approach 2:
The system dynamically adjusts the amplified voltage parameter through the feedback mechanism to maintain optimal signal levels. By automatically modifying the output voltage of the operational amplifier based on feedback, the system ensures consistent signal characteristics for accurate sensing operations, thereby improving measurement precision through adaptive parameter control.
3Stability of the object's composition
If a feedback loop is implemented, then signal consistency is improved, but device complexity increases
Solution Approach 1:
The patent employs a feedback loop where the output signal is divided and fed back to the operational amplifier's non-inverting input. This configuration creates a stable closed-loop system that automatically maintains consistent signal levels by comparing the feedback signal with the reference voltage and adjusting the output accordingly, thereby achieving signal level stability through a relatively simple feedback architecture.
Solution Approach 2:
The operational amplifier serves multiple functions: it amplifies the reference voltage to generate the sensing signal, simultaneously acts as a comparator by receiving feedback, and functions as a voltage regulator to maintain stable output levels. This multi-functionality reduces the need for separate dedicated circuits, achieving signal stability 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
The solution improves the reliability of memory devices by maintaining consistent signal levels, thereby enhancing the accuracy and reliability of data sensing and storage operations.
Implementation Method 1
a first amplifier for outputting an amplified voltage in response to a reference voltage and a feedback voltage
Implementation Method 2
a divider circuit for dividing the amplified voltage to generate a divided voltage and the feedback voltage
Data Source
AI summary
A signal generator includes a first amplifier for outputting an amplified voltage in response to a reference voltage and a feedback voltage, a divider circuit for dividing the amplified voltage to generate a divided voltage and the feedback voltage, and a buffer group for outputting a common sensing signal in response to the amplified voltage and outputting a sensing signal in response to the divided voltage, and a memory device including the signal generator.