Transmission Enable Signal Circuit With Phase-Based Timing Selection
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Solution Overview
Problem
Integrated circuit chips face challenges in accurately distinguishing the operation periods of transmitters and receivers on bidirectional transmission lines, leading to inefficiencies in data transmission and increased area and current consumption due to the need for large data delay circuits.
Innovation Solution
A transmission enable signal generation circuit is introduced, comprising a shift circuit for generating preliminary signals, a phase comparison circuit for comparing signal phases, and a selection circuit for selecting the optimal transmission enable signal based on phase comparisons, allowing for precise adjustment of transmission periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large data delay circuit is used to accurately distinguish transmitter and receiver operation periods, then transmission reliability is improved, but area and current consumption increase
Solution Approach 1:
The invention divides the data delay function into multiple segments: a first data delay circuit for initial delay, a shift circuit for generating multiple preliminary transmission enable signals with different delays, and a phase comparison circuit for selecting the optimal delay. This segmentation replaces a single large delay circuit with multiple smaller functional blocks, reducing overall area while maintaining transmission reliability.
Solution Approach 2:
The invention introduces dynamic adjustment capability through the phase comparison circuit that compares phases of preliminary transmission enable signals with transmission data and dynamically selects the optimal transmission enable signal. This dynamic selection allows the system to adapt to different timing requirements without requiring a fixed large delay circuit, thereby reducing area consumption while ensuring reliable operation period distinction.
2Reliability
If a large data delay circuit is used to accurately distinguish transmitter and receiver operation periods, then transmission reliability is improved, but current consumption increases
Solution Approach 1:
The invention segments the delay function across multiple small circuits (first data delay circuit, shift circuit, phase comparison circuit) rather than using one large delay circuit. Each segment operates at lower power, and only the necessary segments are activated based on phase comparison results, reducing total current consumption while maintaining the reliability needed for accurate operation period distinction.
Solution Approach 2:
The invention changes the delay parameter dynamically by selecting from multiple preliminary transmission enable signals with different delay characteristics. The phase comparison circuit identifies the optimal delay parameter that ensures reliable transmission period distinction, avoiding the need for excessive delay that would require larger, more power-consuming circuits.
3Measurement precision
If multiple preliminary transmission enable signals are generated and phase comparison is performed, then transmission enable signal accuracy is improved, but device complexity increases
Solution Approach 1:
The invention segments the complex signal generation and comparison task into distinct functional blocks: a shift circuit that systematically generates multiple preliminary transmission enable signals with incremental delays, and a phase comparison circuit that systematically compares these signals with transmission data. This segmentation makes the complex operation more manageable and implementable using standard circuit design techniques, reducing the practical complexity despite the enhanced accuracy.
Solution Approach 2:
The invention introduces a phase comparison circuit as an intermediary that mediates between the multiple preliminary transmission enable signals and the final transmission enable signal selection. This intermediary systematically evaluates the phase relationships and automatically selects the optimal signal, reducing the complexity of manual timing adjustment while improving accuracy.
Data Source
AI summary
An integrated circuit which adjusts a period for enabling a transmitter, and includes a data delay circuit delaying data to generate transmission data; a transmission/reception terminal; a receiver receiving reception data transferred to the transmission/reception terminal, in response to a reception enable signal; a transmitter transmitting the transmission data to the transmission/reception terminal in response to a transmission enable signal; a shift circuit generating a plurality of preliminary transmission enable signals by sequentially delaying a signal; a phase comparison circuit comparing a phase of each of the plurality of preliminary transmission enable signals and a phase of the transmission data; and a selection circuit selecting one of the plurality of preliminary transmission enable signals as a transmission enable signal according to a phase comparison result of the phase comparison circuit. Since only one phase comparison circuit is used, a circuit area for generating the transmission enable signal may be reduced.