Memory Receiving Circuit With Adaptive Capacitance Equalization
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Solution Overview
Problem
The increasing integration and data rate in semiconductor memory devices pose challenges to the performance of receiving circuits, particularly in compensating for signal losses during high-speed data transmission, necessitating improved signal integrity.
Innovation Solution
A receiving circuit design incorporating input transistors, equalization transistors, filter circuits, and capacitance adjustment circuits that adapt voltage levels and resistance values based on operating modes to enhance signal integrity by reducing input capacitance and noise components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the integration degree and data rate are increased in semiconductor memory devices, then the productivity and speed are improved, but signal losses increase and signal integrity deteriorates
Solution Approach 1:
The receiving circuit dynamically adjusts its operating characteristics by switching between different modes (first mode and second mode) depending on the operational context. The circuit changes its effective capacitance and resistance values adaptively to maintain signal integrity across different data rates and integration degrees, resolving the contradiction between high-speed operation and signal quality preservation.
Solution Approach 2:
The patent employs parameter changes by modifying the electrical characteristics of the receiving circuit through mode switching. By changing the effective capacitance and resistance parameters based on operational requirements, the circuit optimizes signal reception for both high-speed data transmission and integrated environments, thereby maintaining signal integrity while achieving high productivity.
2Reliability
If a filter circuit is added to filter the input signal, then signal integrity is improved, but the device complexity increases
Solution Approach 1:
The receiving circuit is designed to perform multiple functions within a unified structure. The filter circuit is integrated into the existing receiving circuit architecture rather than being added as a separate standalone component. This multi-functional design achieves signal filtering while minimizing additional complexity by reusing existing circuit elements and nodes.
Solution Approach 2:
The filtering function is merged with the existing receiving circuit components. The filter circuit shares nodes and elements with the input transistors and equalization circuitry, combining multiple functions (signal reception, equalization, and filtering) into a single integrated structure that reduces overall device complexity while maintaining signal integrity.
Data Source
AI summary
Disclosed is a receiving circuit, which includes a first input transistor, a second input transistor, a first equalization transistor, a second equalization transistor, a filter circuit, and an input capacitance adjustment circuit. The first input transistor receives a first input signal through a first input node. The second input transistor receives a second input signal through a second input node. The first equalization transistor is connected in parallel with the first input transistor. The second equalization transistor is connected in parallel with the second input transistor. The filter circuit filters the first input signal and includes one or more internal nodes. The input capacitance adjustment circuit adjusts voltage levels of the one or more internal nodes based on an operating mode of a semiconductor memory device.