Frequency-Controlled Voltage Source for Asynchronous Processors
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Solution Overview
Problem
Synchronous digital logic circuits face challenges in minimizing power consumption when operating near or below the transistor threshold voltage, as delay variations make it difficult to estimate the minimum required clock frequency, while asynchronous processors require efficient power management to operate at the lowest speed necessary for battery-powered applications.
Innovation Solution
A frequency-controlled voltage source system that includes a frequency comparator and a charge pump to dynamically adjust the voltage supplied to an asynchronous processor based on its operating speed, using a capacitor charged by a pulse generator and inductor, ensuring the processor operates at sufficient speed by increasing voltage when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If synchronous processors operate near or below transistor threshold voltage to minimize power consumption, then power consumption is reduced, but delay variations make it difficult to estimate minimum required clock frequency
Solution Approach 1:
The system uses the processor's own output signals to control its power supply voltage. The frequency comparator monitors the processor's operating frequency and automatically adjusts the voltage to maintain optimal operation, making the system self-regulating without external intervention.
Solution Approach 2:
A feedback loop is established where the frequency comparator continuously monitors the processor's operating frequency and provides control signals to the charge pump, which adjusts the voltage supplied to the processor. This closed-loop feedback enables dynamic voltage adjustment based on actual operating conditions.
2Use of energy by moving object
If asynchronous processors operate at lowest speed necessary for battery-powered applications, then power consumption is minimized, but voltage must be dynamically adjusted to maintain sufficient operating speed
Solution Approach 1:
The power supply voltage is made dynamic rather than fixed. The charge pump continuously adjusts the voltage level based on real-time frequency measurements, allowing the system to adapt to changing operational requirements and maintain optimal speed while minimizing power consumption.
Solution Approach 2:
The system changes the voltage parameter dynamically to optimize processor performance. By adjusting the supply voltage based on measured frequency, the system can operate at the lowest necessary speed for power efficiency while ensuring sufficient operating performance when required.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows asynchronous processors to maintain optimal operating speed while minimizing power consumption by dynamically adjusting voltage, ensuring efficient operation in battery-powered applications like remote sensing.
Implementation Method 1
A frequency-controlled voltage source for use with an asynchronous processor includes a capacitor, an inductor, and a pulse generator
Implementation Method 2
A frequency-controlled voltage source for use with an asynchronous processor includes a capacitor, an inductor, and a pulse generator
Implementation Method 3
A frequency-controlled voltage source system that includes a frequency comparator and a charge pump to dynamically adjust the voltage supplied to an asynchronous processor
Data Source
AI summary
Voltage source circuits, asynchronous processing systems and methods are disclosed. A voltage source circuit includes a capacitor storing an operating voltage for an asynchronous processor. A frequency comparator compares a frequency reference and a feedback signal indicative of an operating frequency of the asynchronous processor to determine whether or not the operating frequency is less than a target frequency. When operating frequency is less than the target frequency, a charge pump adds charge to the capacitor.