Ferroelectric Latch Circuit for Low-Power State Retention
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Solution Overview
Problem
Sequential circuits face challenges in reducing power consumption due to the dynamic power consumption associated with switching transistors and extensive interconnect routings, which is a barrier in achieving lower power consumption goals, especially in battery-powered devices.
Innovation Solution
The use of non-linear polar capacitors in sequential circuits, such as 3-input majority and threshold gates, which eliminate the need for switching transistors and reduce interconnect lengths, allowing for lower power operation and non-volatile data storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional sequential circuits use switching transistors and interconnects, then logic functionality is achieved, but power consumption increases
Solution Approach 1:
The patent extracts and eliminates the switching transistor component from the sequential circuit architecture. By using a latch circuit that maintains state through feedback connections rather than active switching, the design removes the primary source of dynamic power consumption while preserving logic functionality.
Solution Approach 2:
The patent replaces the mechanical/electronic switching mechanism with a passive latch-based state retention mechanism. Instead of using transistors to actively switch states, the circuit uses capacitive storage and feedback to maintain state, eliminating the need for continuous switching operations that consume power.
2Use of energy by moving object
If processors operate at lower voltage levels to save power, then energy efficiency improves, but operational reliability may deteriorate
Solution Approach 1:
The latch circuit design incorporates inherent noise margins and state stability mechanisms that cushion against voltage fluctuations. By using feedback connections and capacitive storage, the circuit maintains stable state retention even at lower voltage levels, preventing erroneous state transitions while consuming less power.
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 approach results in a significant reduction in power consumption, enabling processors to operate at lower voltage levels, enter low-power states without data loss, and achieve compact, high-density logic gate designs with reduced interconnects.
Implementation Method 1
one terminal of a capacitor comprising ferroelectric material is coupled to a second terminal
Data Source
AI summary
A low power sequential circuit (e.g., latch) uses a non-linear polar capacitor to retain charge with fewer transistors than traditional CMOS sequential circuits. The sequential circuit includes a 3-input majority gate having first, second, and third inputs, and a first output. The sequential circuit includes a driver coupled to the first output, wherein the driver is to generate a second output. The sequential circuit further includes an exclusive-OR (XOR) gate to receive a clock and the second output, wherein the XOR gate is to generate a third output which couples to the second input, where the first input is to receive a data, and wherein the third input is to receive the second output.