Internal Voltage Generation Circuit Ripple Minimization
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Solution Overview
Problem
Existing internal voltage generation circuits in semiconductor apparatuses generate pumped voltages with significant ripples due to their pumping operations, which hinder normal operation by introducing noise.
Innovation Solution
An internal voltage generation circuit that includes an oscillation circuit, a signal generation circuit, and a pumping circuit, which generates a pumped voltage through a minimized pumping operation by using first and second pumping driving signals based on oscillating signals, and a comparison circuit to control the pumping operation, thereby minimizing ripples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a pumping operation is performed to generate a pumped voltage higher than the power supply voltage, then the voltage level is improved, but ripples and noise are generated in the pumped voltage
Solution Approach 1:
The patent applies periodic action by using oscillating signals to control the pumping circuit. The signal generation circuit generates pumping driving signals that correspond to the oscillating signal, enabling the pumping operation to be performed periodically at specific phases of the oscillation cycle. This periodic control allows voltage pumping to occur only during designated time windows, reducing continuous switching activity and associated ripples.
Solution Approach 2:
The patent implements feedback through the comparison circuit that compares the pumped voltage with a reference voltage and generates a comparison signal. This feedback mechanism allows the system to monitor the pumped voltage level and adjust the pumping operation accordingly, enabling the pumping to be performed only when needed to maintain the target voltage level, thereby reducing unnecessary pumping actions and associated ripples.
2Stability of the object's composition
If continuous pumping operation is performed to maintain the pumped voltage, then the voltage stability is improved, but power consumption increases and ripples are generated
Solution Approach 1:
The patent uses periodic action by controlling the pumping circuit to operate only during specific phases of the oscillating signal cycle rather than continuously. The signal generation circuit enables pumping activity only when the oscillating signal is at appropriate phases, reducing the duty cycle of the pumping operation while maintaining voltage stability through periodic reinforcement.
Solution Approach 2:
The comparison circuit provides feedback by continuously monitoring the pumped voltage level and comparing it with the reference voltage. When the pumped voltage exceeds the reference voltage, the comparison signal stops the pumping operation. This feedback control ensures voltage stability is maintained only when necessary, reducing power consumption by eliminating continuous pumping.
3Temperature
If the pumping operation is performed to generate higher voltage, then the voltage level is improved, but the noise hinders normal semiconductor apparatus operation
Solution Approach 1:
The patent applies periodic action by synchronizing the pumping operation with the oscillating signal phases. The pumping circuit is controlled to operate only during specific phases of the oscillation cycle, which concentrates the voltage boosting action into discrete time windows. This periodic control reduces continuous noise generation while maintaining the ability to generate higher voltage levels when needed.
Solution Approach 2:
The comparison circuit provides feedback control by monitoring the pumped voltage and stopping the pumping operation when the target voltage level is reached or exceeded. This feedback mechanism prevents over-pumping and reduces noise interference by eliminating unnecessary pumping activity that would generate additional noise, while still achieving the required voltage level.
Data Source
AI summary
An internal voltage generation circuit may include an oscillation circuit, a signal generation circuit, and a pumping circuit. The oscillation circuit may generate an oscillation signal. The signal generation circuit may generate first and second pumping driving signals on the basis of the oscillation signal. The pumping circuit may generate a pumping voltage through a pumping operation on the basis of the first and second pumping driving signals.