Strobe Timing Control for Reference Voltage Noise Reduction
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Solution Overview
Problem
Semiconductor apparatuses face challenges in minimizing noise caused by mismatched transition timings of strobe and strobe bar signals, leading to errors in data reception due to noise in the reference voltage.
Innovation Solution
Incorporating a noise determination circuit to generate up and down control signals based on reference voltage levels, and a strobe signal control circuit to adjust the transition timings of strobe signals, ensuring synchronization between strobe and strobe bar signals by shifting their edges, thereby reducing noise and improving data reception accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transition timings of strobe and strobe bar signals are not synchronized, then the circuit operation is simple, but noise occurs in the reference voltage causing data reception errors
Solution Approach 1:
The noise determination circuit continuously monitors the reference voltage for noise conditions and provides feedback control signals to the strobe signal control circuit. This feedback mechanism dynamically adjusts the strobe signal transition timings to maintain synchronization and eliminate noise, thereby improving data reception accuracy while managing circuit complexity through automated control.
Solution Approach 2:
The strobe signal control circuit acts as an intermediary between the noise determination circuit and the reception circuits. It receives control signals indicating noise conditions and intermediary strobe signals, then generates optimized strobe signals with adjusted transition timings. This intermediary function resolves the contradiction by coordinating between noise detection and signal generation to ensure reliable data reception.
2Object-affected harmful factors
If the transition timing of strobe signal is adjusted to synchronize with strobe bar signal, then noise in reference voltage is minimized, but additional control circuits are required
Solution Approach 1:
The noise determination circuit and strobe signal control circuit are integrated into a unified control system that manages both noise detection and strobe signal generation. By merging these functions into coordinated circuits that share control signals and timing information, the patent reduces overall system complexity while effectively minimizing noise through synchronized transition timings.
Solution Approach 2:
The strobe signal control circuit dynamically changes the transition timing parameter of the strobe signal based on noise conditions detected by the noise determination circuit. When noise is detected, the circuit adjusts the transition timing to match the strobe bar signal, thereby minimizing noise impact on the reference voltage without requiring completely separate control circuits.
3Measurement precision
If noise determination circuit is added to detect reference voltage noise, then data reception accuracy improves, but device complexity increases
Solution Approach 1:
The noise determination circuit is designed with multi-functionality, serving both as a noise detector and as a trigger for the strobe signal control mechanism. By making the noise determination circuit universal - capable of both detecting noise conditions and initiating timing adjustments - the patent improves measurement precision while minimizing the increase in device complexity through functional integration.
Data Source
AI summary
A semiconductor apparatus may include a noise determination circuit, a strobe signal control circuit, and a reception circuit. The noise determination circuit may sense and determine noise of a reference voltage, and generate an up control signal and a down control signal. The strobe signal control circuit may adjust a transition timing of a strobe signal in response to the up control signal and the down control signal, and output a control strobe signal. The reception circuit may generate internal data signal in response to external data signal, the reference voltage, and the control strobe signal.