Multiple Data Rate Counter Using Buffered Clock and Ripple Counting
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Solution Overview
Problem
Conventional counters used in electronic devices, such as image sensors, face limitations in operation speed and power consumption due to their configuration and design, particularly when handling multiple data rates, which affects the performance and efficiency of these devices.
Innovation Solution
A counter design incorporating a buffer unit and a ripple counter that generates multiple data rates by buffering clock signals and sequentially toggling flip-flops, allowing for enhanced counting rates such as double data rate (DDR) and quadruple data rate (QDR) operations, thereby improving operation speed and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional counter design is used, then device simplicity is maintained, but operation speed is limited and power consumption increases
Solution Approach 1:
The counter is divided into multiple independent counting units (first counting unit, second counting unit, third counting unit, fourth counting unit), each handling specific counting operations. This segmentation allows parallel processing of counting tasks, thereby increasing operation speed while keeping each individual unit relatively simple in structure.
Solution Approach 2:
The counter employs dynamic clock signal distribution where different clock phases (CLK1, CLK2, CLK3, CLK4) are selectively applied to different counting units based on operational requirements. This dynamic approach enables the counter to adapt its internal timing and achieve higher data rates without permanently increasing structural complexity.
2Loss of energy
If conventional counter design is used, then power consumption increases, but counting functionality is maintained
Solution Approach 1:
The counter utilizes periodic clock signals with different phases (CLK1, CLK2, CLK3, CLK4) to drive different counting units in sequence. By organizing counting operations into periodic cycles where different units are activated at different phases, the system achieves higher effective counting rates while allowing individual units to remain in low-power states during their inactive phases, thereby reducing overall power consumption.
3Productivity
If multiple data rate counting is implemented, then operation speed is enhanced, but device complexity increases
Solution Approach 1:
Multiple counting units are merged into a single integrated counter structure that shares common resources such as the output register and control logic. The first, second, third and fourth counting units are combined to form one cohesive counter device, achieving multiple data rate functionality while avoiding the complexity of completely separate counter systems.
Solution Approach 2:
Each counting unit is designed with multi-functional capability to handle different counting operations. The counting units can operate in various modes and can be selectively activated based on the required data rate, making the overall counter structure versatile and adaptable to different performance requirements without needing dedicated hardware for each counting rate.
Data Source
AI summary
A counter includes a buffer unit and a ripple counter. The buffer unit generates at least one least significant signal of a count by buffering at least one clock signal until a termination time point. The ripple counter generates at least one most significant signal of the count by sequentially toggling in response to at least one of the least significant signal. The counter performs multiple data rate counting with enhance operation speed and reduced power consumption.