Voltage Generation Circuit with Switched Resistor-Capacitor Networks
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Solution Overview
Problem
Existing voltage generation circuits in semiconductor devices take a long time to change the voltage value of the reference voltage.
Innovation Solution
A voltage generation circuit with a resistor circuit and a capacitor circuit, where the resistor circuit includes multiple resistors and switching elements, and the capacitor circuit includes capacitors with voltage boost or drop functions, allowing for rapid change in output voltage by controlling the capacitors based on a target output voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a conventional voltage generation circuit is used, then the circuit structure is simple, but the time required to change the voltage value is long
Solution Approach 1:
The voltage generation circuit is segmented into multiple resistor elements connected in series, with switching elements connected to intermediate nodes. This allows selective connection of different resistor combinations to achieve multiple voltage values, reducing the time required to change voltage compared to conventional designs.
Solution Approach 2:
The circuit employs switching elements that dynamically reconfigure the resistor network based on desired voltage output. By actively switching between different resistor combinations, the circuit rapidly adjusts voltage values without requiring physical reconfiguration, thereby reducing voltage change time while maintaining manageable complexity.
2Productivity
If the voltage value changes rapidly, then productivity is improved, but voltage stability during transition may be compromised
Solution Approach 1:
The circuit pre-configures multiple resistor combinations in advance, with switching elements ready to connect specific configurations. When voltage change is required, the appropriate pre-configured path is activated, enabling rapid voltage transition while maintaining stability through predetermined stable states.
Solution Approach 2:
The circuit incorporates feedback mechanisms that monitor the output voltage during switching transitions. This feedback ensures that voltage remains stable by detecting and correcting any deviations that occur during the transition between different voltage values, thus maintaining both speed and stability.
Data Source
AI summary
A voltage generation circuit includes a first input terminal at a power supply voltage, a second input terminal at a reference voltage, an output terminal, a resistor circuit, and a capacitor circuit. The resistor circuit includes resistors connected in series between the first and second input terminals and switching elements connected between the output terminal and a respective one of a plurality of nodes. The capacitor circuit includes a plurality of capacitors, each of which has a first terminal to which a first voltage or a second voltage is applicable and a second terminal connected to the output terminal. The first voltage or the second voltage is selectively applied to the first terminals of the capacitors in accordance with a target value of an output voltage.