Dynamic Voltage Control for Sensitive Amplifier Noise and Speed
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Solution Overview
Problem
The existing signal amplification process in semiconductor memory, particularly in DRAM, suffers from low amplification speed and is prone to noise, affecting the performance of sensitive amplifiers.
Innovation Solution
An amplification control method and circuit that includes a power output circuit, an isolation control circuit, and an amplification circuit, where the isolation power value and control instruction signal are determined to generate an isolation control signal, optimizing the signal amplification process by adjusting the specific voltage values to improve amplification speed and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensitive amplifier is used to amplify memory cell signals, then signal quality is improved, but amplification speed becomes slow and noise increases
Solution Approach 1:
The patent applies dynamics by making the power supply voltage to the sensitive amplifier dynamic rather than static. The power supply voltage is adjusted in real-time based on the operating stage: using a first voltage value during charge sharing stage to enable fast switching, and a second voltage value during amplification stage to reduce noise. This dynamic adjustment resolves the contradiction by allowing the amplifier to achieve both fast switching speed and low noise performance at different times.
Solution Approach 2:
The patent changes the power supply voltage parameter of the sensitive amplifier according to different operating stages. By switching between a first voltage value (higher) and a second voltage value (lower), the system optimizes performance: the higher voltage enables faster switching during charge sharing, while the lower voltage reduces noise during amplification, thus resolving the speed-noise tradeoff.
2Reliability
If a sensitive amplifier is used to amplify memory cell signals, then signal quality is improved, but circuit noise increases
Solution Approach 1:
The patent applies periodic action by using different power supply voltage levels at different time periods corresponding to different operating stages. During the charge sharing stage, a first voltage value is applied; during the amplification stage, a second voltage value is applied. This periodic switching of voltage levels allows the system to achieve high signal quality while minimizing noise by using lower voltage during the critical amplification phase.
Solution Approach 2:
The patent changes the power supply voltage parameter dynamically based on the operating stage. By switching between a first voltage value (higher) and a second voltage value (lower), the system optimizes performance: the higher voltage enables faster switching during charge sharing, while the lower voltage reduces noise during amplification, thus resolving the speed-noise tradeoff.
3Reliability
If the amplification circuit processes signals through multiple stages, then signal quality is improved, but the processing time increases
Solution Approach 1:
The patent applies preliminary action by performing the charge sharing operation before the amplification operation. During the charge sharing stage, the memory cell charge is shared with the bit line and readout bit line, preparing the voltage difference that will be amplified. This preliminary preparation allows the subsequent amplification stage to work more efficiently, reducing the overall processing time while maintaining signal quality.
Data Source
AI summary
An amplification control method and circuit, a sensitive amplifier and a semiconductor memory are provided. The method includes that: a preset instruction is received, and an isolation power value and a control instruction signal are determined according to the preset instruction; an isolation control signal is generated according to the isolation power value and the control instruction signal; and an amplification circuit receives the isolation control signal and a target signal to be processed according to the preset instruction, and processes the signal to be processed and completes the preset instruction.