Reference Voltage Buffer Circuit for Faster Signal Level Settling
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Solution Overview
Problem
Semiconductor apparatuses face challenges in generating reference voltages efficiently for differential signal amplification, as existing solutions often require external reference voltages or complex internal circuits to produce multiple voltage levels, which can lead to increased complexity and slower signal processing.
Innovation Solution
A semiconductor apparatus with a reference voltage generating circuit that produces multiple reference voltages based on a voltage setting signal, allowing for the selection of appropriate voltages to determine a target reference voltage for signal amplification, thereby reducing complexity and improving signal processing speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external reference voltages are used for buffer operation, then the buffer can perform differential amplification, but the device complexity increases and signal processing speed decreases
Solution Approach 1:
The patent combines the reference voltage generation function with the buffer circuit by integrating a reference voltage generating circuit inside the buffer. This merging eliminates the need for external reference voltage sources and reduces overall device complexity while maintaining reliable differential amplification operation.
Solution Approach 2:
The buffer circuit is designed to generate multiple reference voltages (first reference voltage and second reference voltage) internally, making it a multi-functional device that can operate with different voltage levels without requiring external reference sources, thus improving both reliability and reducing complexity.
2Adaptability or versatility
If multiple reference voltages are generated using complex internal circuits, then the buffer can select appropriate voltages for amplification, but the device complexity increases
Solution Approach 1:
The reference voltage generation circuit is segmented into multiple independent voltage generation paths, each producing a specific reference voltage level. This segmentation allows the circuit to provide multiple voltage options while keeping each generation path relatively simple, thus maintaining adaptability without excessive complexity.
Solution Approach 2:
The circuit employs dynamic voltage selection through control signals that can selectively enable different reference voltage paths based on operational requirements. This dynamic capability allows the buffer to adapt to different voltage needs without requiring all voltage generation circuits to be permanently active, reducing overall complexity.
3Productivity
If multiple reference voltages are generated rapidly, then signal processing speed improves, but the device complexity increases
Solution Approach 1:
The reference voltages are pre-generated and held ready in the reference voltage generating circuit before they are needed for signal amplification. This preliminary action eliminates the delay that would occur if voltages had to be generated on-demand, thus improving signal processing speed without requiring overly complex real-time generation circuits.
Solution Approach 2:
The buffer circuit serves itself by generating its own reference voltages internally through an integrated reference voltage generating circuit. This self-service capability eliminates the need for external reference sources and reduces the time required for signal level settling, thereby improving productivity without proportionally increasing complexity.
Data Source
AI summary
A semiconductor apparatus includes a reference voltage generating circuit and a buffer. The reference voltage generating circuit may generate, based on a voltage setting signal, a first reference voltage and a second reference voltage, which has the same level as the first reference voltage or has a lower level than the first reference voltage by an amount of a unit level. The buffer may generate an output signal based on the first reference voltage, the second reference voltage and an input signal.