Dynamic Current Correlating Circuit for Low Power ADC
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Solution Overview
Problem
Wearable and implantable electrocardiogram devices face challenges with battery life due to limited space, requiring reduced power consumption in analog-to-digital converters to prolong service time without frequent battery replacement.
Innovation Solution
A dynamic current correlating circuit with a reset circuit, first and second current generating circuits, and latch circuits, along with an adjustable delay circuit and bypass switching logic, is used to optimize current flow and reduce power consumption in analog-to-digital converters, allowing for efficient signal conversion with minimal hardware components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the battery capacity is increased to prolong service time, then the operational duration is extended, but the device volume increases
Solution Approach 1:
The patent implements periodic action by using a dynamic current correlating circuit that alternates between discharge and charge phases. The reset circuit periodically resets the current state, and the current generating circuits produce currents in periodic cycles, enabling the system to achieve extended operational duration through efficient periodic energy utilization rather than requiring larger battery capacity
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting current parameters through the dynamic current correlating circuit. The circuit changes current magnitude and direction based on input voltages, optimizing power consumption characteristics to extend service time without increasing device volume
2Use of energy by moving object
If the number of logic circuits is reduced to lower power consumption, then the power consumption decreases, but the conversion efficiency may be affected
Solution Approach 1:
The patent replaces traditional mechanical logic circuits with a dynamic current correlating circuit that uses electrical current relationships to perform comparison and conversion functions. This substitution eliminates the need for multiple discrete logic gates while maintaining conversion efficiency through direct electrical signal processing
Solution Approach 2:
The dynamic current correlating circuit serves multiple functions simultaneously: it acts as a comparator, performs analog-to-digital conversion, and manages current correlation all within a single integrated circuit structure. This multi-functionality reduces the total number of logic circuits needed while maintaining high conversion efficiency
Data Source
AI summary
A dynamic current correlating circuit is disclosed. The current correlating circuit includes a reset circuit, a first current generating circuit and a second current generating circuit. The reset circuit executes a discharging procedure during a first time interval and executes a charging procedure during a second time interval. The first current generating circuit is electrically connected to the reset circuit. The first current generating circuit generates a first sub-current and a second sub-current during a third time interval according to a first input voltage and a second input voltage and generates a first current after the third time interval. The second current generating circuit is electrically connected to the reset circuit. The second current generating circuit generates a second current according to the first input voltage and the second input voltage after the third time interval.