Current Providing Circuit Feedback for Stable Output Voltage
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Solution Overview
Problem
Existing current providing circuits in memory systems face challenges in controlling the turn on/turn off time period, leading to unpredictable output voltage drops due to variations in device characteristics and environmental factors, affecting the performance and functionality of memory devices.
Innovation Solution
A current providing circuit with a control voltage generating module that adjusts the turn on/turn off time of the current providing module based on the received voltage level, device characteristics, and real-time output voltage, using a replica current providing module, clamping circuit, control logic circuit, and capacitors to generate a control voltage that accurately manages the PMOSFET's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PMOSFET in the current providing circuit turns on for a longer time period to raise the output voltage, then the output voltage can be raised more effectively, but the output voltage may be raised too much causing device malfunction
Solution Approach 1:
The patent implements a feedback mechanism where the control voltage generating module continuously monitors the output voltage level and adjusts the control signal to the PMOSFET accordingly. When the output voltage reaches the target level, the feedback signal automatically turns off the PMOSFET, preventing over-voltage conditions and ensuring reliable voltage regulation without manual timing control.
2Ease of operation
If the PMOSFET turns on for a shorter time period to avoid over-voltage, then device safety is improved, but the output voltage may remain too low to function properly
Solution Approach 1:
The feedback control mechanism ensures that the PMOSFET remains on as long as the output voltage is below the target level. The control voltage generating module continuously compares the actual output voltage with the reference voltage and maintains the PMOSFET in the on-state until the voltage threshold is reached, guaranteeing sufficient voltage output for proper device operation.
3Measurement precision
If the current providing circuit parameters are adjusted to account for process and environmental variations, then voltage control accuracy is improved, but the circuit complexity increases
Solution Approach 1:
The patent employs parameter changes by adjusting the reference voltage and control threshold levels to compensate for process and environmental variations. The control voltage generating module dynamically adapts its operating parameters based on detected conditions, maintaining accurate voltage control without requiring complex additional circuitry or manual calibration.
Data Source
AI summary
A current providing circuit, for providing an output current at an output terminal, comprising: a current providing module, coupled to a first predetermined voltage level, for providing the output current according to the first predetermined voltage level and a control voltage transmitted to the current providing module; and a control voltage generating module, for generating the control voltage corresponding to the first predetermined voltage level and a threshold voltage of the current providing module.