Flash Memory Voltage Supply Circuit with Pre-Pumping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional voltage supply circuits for flash memory devices cannot supply sufficient voltage for operation until a certain Power-Up Point (PUP) is reached, leading to inefficient use of operating current and prolonged voltage pumping times.
Innovation Solution
A voltage supply circuit that includes a voltage generator and controller to pre-pump and store an external voltage before power-up, allowing for efficient voltage generation and reduction of pumping time by adding the stored voltage to the external voltage when in an active state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage pumping operation is performed only after reaching Power-Up Point, then the voltage supply circuit can operate safely within voltage limits, but the voltage pumping time is prolonged and current consumption increases
Solution Approach 1:
The voltage supply circuit performs preliminary voltage pumping operation during the power-up phase before the flash memory device is fully initialized. The circuit pumps voltage in advance and stores it in an internal capacitor, so that when programming operations are needed, the pre-pumped voltage can be immediately utilized, significantly reducing the voltage pumping time during active operations.
Solution Approach 2:
The voltage supply circuit continuously performs voltage pumping during idle periods and power-up phases rather than waiting until active operations are required. This continuous useful action ensures that voltage is always available or nearly available when needed, eliminating idle time and reducing overall operational delays.
2Device complexity
If voltage pumping operation is delayed until active command is input, then the circuit can maintain simplicity and avoid premature operation, but current consumption increases and pumping time is extended
Solution Approach 1:
The circuit performs preliminary voltage pumping during power-up and idle states, utilizing periods when no active programming operation is required. By pumping voltage in advance and storing it in an internal capacitor, the circuit reduces the duration and current demand of pumping operations during active programming, thereby reducing overall current consumption without adding complex control logic.
3Speed
If external voltage is used directly as internal voltage up to Power-Up Point, then the device can initialize quickly, but insufficient voltage is available for proper operation
Solution Approach 1:
During the power-up phase before the flash memory device is fully initialized, the voltage supply circuit performs preliminary voltage pumping operation to generate and store adequate voltage levels in an internal capacitor. This preliminary action ensures that when the device becomes operational, sufficient voltage is already available for reliable programming and erasing operations, while not delaying the initialization process.
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 approach reduces the time required for voltage pumping and conserves current consumption by initiating voltage pumping before reaching the PUP and storing a set voltage level, enabling rapid generation of a stable operating voltage.
Implementation Method 1
The voltage generator is configured to pump an externally input voltage and store the pumped external voltage as a first voltage having a set voltage level, before power-up begins
Data Source
AI summary
A voltage supply circuit includes a voltage generator and a controller. The voltage generator is configured to pump an externally input voltage and store the pumped external voltage as a first voltage having a set voltage level, before power-up begins, or pump the external voltage, add the pumped voltage to the stored voltage, and output the added voltage as an operating voltage. The controller is configured to output a first control signal to drive the voltage generator or stop operation of the voltage generator, according to an operating state.