Flash Memory Voltage Generator with Dynamic Charge Pump
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Solution Overview
Problem
Conventional charge pump circuits in flash memories generate excessive output voltage, leading to power waste and severe ripple phenomena in the power quality when the power needed by the flash memory decreases, as they do not adjust their output voltage accordingly.
Innovation Solution
A voltage generator with a charge pump circuit and a voltage regulator that includes multiple charge pump units with adjustable pump enabling signals and control signals to dynamically adjust the output voltage based on the power requirements of the flash memory, ensuring the output voltage is not excessively high and reducing ripple in the regulated output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the charge pump circuit is designed to provide a relatively high output voltage to meet the maximum power need of the flash memory, then the power supply capability is improved, but the power consumption increases when the power needed by the flash memory decreases
Solution Approach 1:
The charge pump circuit is designed with dynamic voltage adjustment capability, allowing the output voltage to be varied based on the actual power needs of the flash memory. The circuit can switch between different voltage levels (e.g., first output voltage for maximum power mode, second output voltage for normal operation), transforming a static voltage source into a dynamic one that adapts to changing load requirements, thereby resolving the contradiction between maintaining high power supply capability and reducing power consumption.
Solution Approach 2:
The invention changes the voltage parameter of the charge pump output based on operational conditions. By adjusting the output voltage level according to the flash memory's power requirements, the system optimizes the balance between power supply capability and power consumption, avoiding the waste of energy that occurs when a fixed high voltage is supplied regardless of actual demand.
2Power
If the charge pump circuit generates a high output voltage, then the power supply capability is improved, but the ripple phenomenon in the generated power becomes severe
Solution Approach 1:
The charge pump circuit dynamically adjusts its output voltage level based on the actual power requirements of the flash memory. By operating at the minimum necessary voltage rather than a fixed high voltage, the circuit maintains adequate power supply capability while significantly reducing the ripple phenomenon that occurs at higher voltage levels, thus resolving the contradiction between power supply capability and ripple reduction.
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 solution effectively reduces power consumption and minimizes the ripple phenomenon in the regulated output voltage by adjusting the output voltage of the charge pump circuit to match the power needs of the flash memory, enhancing power quality.
Implementation Method 1
The charge pump circuit is used to provide a relatively high output voltage to the voltage regulator
Implementation Method 2
the voltage regulator generates the power that the flash memory needs according to the output voltage
Data Source
AI summary
A voltage generator adapted for a flash memory is disclosed. The voltage generator includes a charge pump circuit and a voltage regulator. The charge pump circuit includes at least one charge pump unit having a voltage receiving terminal and a voltage transmitting terminal. The voltage receiving terminal receives a reference voltage and the voltage transmitting terminal generates an output voltage. The charge pump unit includes first and second voltage transmitting channels and first and second capacitors. The first and second voltage transmitting channels are turned on or off according first and second control signals, respectively. The first and second capacitors receive the first and second pump enabling signals, respectively. The voltage regulator outputs a regulated output voltage according to the output voltage.