Ripple Compensator Circuit for Power Supply Voltage Stabilization
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Solution Overview
Problem
Semiconductor devices experience signal processing degradation due to ripples in power supply voltage caused by switching currents, which existing technologies fail to adequately address.
Innovation Solution
A ripple compensator is integrated into semiconductor devices to generate a compensation current based on input data patterns, reducing the ripple in power supply voltage by providing this current to the power supply node during data transitions, using a compensation capacitance device and a separate power supply voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If switching current is generated during signal processing, then data processing functionality is achieved, but ripple in power supply voltage occurs causing signal processing degradation
Solution Approach 1:
The ripple compensator generates a compensation current in advance that opposes the switching current's harmful effect. The compensator receives the same input data as the data driving circuit and generates compensation current based on the predicted switching pattern, thereby preemptively counteracting the voltage ripple before it degrades signal processing characteristics.
Solution Approach 2:
The invention converts the harmful switching current into a useful compensation signal. By monitoring the input data pattern that causes switching current, the ripple compensator generates a compensation current that mirrors the switching pattern but with opposite polarity, transforming the harmful effect into a beneficial voltage stabilization mechanism.
2Reliability
If ripple compensator is added to reduce power supply voltage ripple, then signal processing characteristics improve, but device complexity increases
Solution Approach 1:
The ripple compensator is designed to perform multiple functions using the same input data signal. It simultaneously generates compensation current based on the input data pattern without requiring separate sensing circuits or additional control logic, thereby reducing complexity while maintaining effectiveness in voltage ripple reduction.
Solution Approach 2:
The ripple compensator uses the input data signal itself as the basis for generating compensation current, eliminating the need for external sensing or monitoring circuits. The compensator autonomously generates the appropriate compensation signal by processing the same input data that drives the main circuit, reducing overall system complexity.
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 the ripple in the power supply voltage, thereby improving signal processing characteristics without significant additional power consumption or complexity, even when multiple circuit blocks operate at different frequencies.
Implementation Method 1
a compensation capacitance device (e.g., a capacitor) connected to an output terminal of the buffer, the compensation capacitance device being configured to vary a voltage level of a second node in response to a transition of the input data and transfer the compensation current to the first node
Data Source
AI summary
A semiconductor device includes a data driving circuit configured to receive input data, receive a first power supply voltage through a first node, and to generate output data by driving the input data, and a ripple compensator connected to the first node and configured to receive the input data in parallel with the data driving circuit, to generate a compensation current corresponding to a pattern of the input data, and to provide the compensation current to the first node to reduce a ripple of the first power supply voltage.