Strobe Buffer Timing for Stable Multi-Phase Internal Clocks
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Solution Overview
Problem
Semiconductor devices face challenges in generating internal clock signals with different phases efficiently, which is crucial for high-speed operations, as existing technologies often suffer from signal distortion and instability due to reflected waves.
Innovation Solution
An integrated circuit design that includes a drive control signal generator to enable the strobe signal driver prior to the buffer enablement signal, generating internal clock signals with distinct phases by using an internal clock generator, which buffers the strobe signal to produce stable waveforms and phase-differentiated clock signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the buffer enablement signal is enabled simultaneously with or after the strobe signal, then the input buffer can buffer the strobe signal, but signal distortion occurs due to reflected waves
Solution Approach 1:
The drive control signal is enabled prior to the buffer enablement signal, allowing the strobe signal to be driven and settled before being buffered by the input buffer. This preliminary action prevents signal distortion caused by reflected waves by ensuring the signal is stable before entering the buffer.
2Speed
If internal clock signals are generated with phase differences for high-speed operation, then data transmission speed increases, but signal distortion and instability occur
Solution Approach 1:
The drive control signal is activated before the buffer enablement signal, pre-driving the strobe signal to ensure stability before it is buffered and used to generate phase-differentiated internal clock signals. This preliminary action maintains signal integrity while enabling high-speed multi-phase clock generation.
Data Source
AI summary
A integrated circuit may include an input buffer suitable for buffering a strobe signal in response to a buffer enablement signal to generate an internal strobe signal, an internal clock generator suitable for receiving the internal strobe signal to generate internal clock signals including different phases. The integrated circuit may include a strobe signal driver suitable for driving the strobe signal in response to a drive control signal. The drive control signal may be enabled prior to the buffer enablement signal being enabled.