Bidirectional Shift Register Circuit Using Clock-Controlled Flipflops
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shift registers have limited directional control, primarily allowing for one-way data shifting, which restricts their application in bidirectional data transfer scenarios.
Innovation Solution
A semiconductor device incorporating a shift register with multiple flipflops, where the shift direction can be dynamically controlled through the use of transistors and clock signals, allowing for bidirectional data shifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional shift register with fixed-direction transistors is used, then the circuit structure is simple, but the shift direction cannot be changed
Solution Approach 1:
The patent applies dynamics by making the transistor connections configurable rather than fixed. The shift register uses transmission gates or multiplexers that can dynamically change which transistor connects to which node based on control signals, enabling the shift direction to be changed during operation without redesigning the physical layout.
Solution Approach 2:
The patent implements universality by designing the shift register so that the same physical transistor can serve different functions depending on the control state. The transistors are arranged in a symmetric configuration where each transistor can participate in either left-to-right or right-to-left shifting operations, allowing one circuit to perform multiple shift direction functions.
2Adaptability or versatility
If transistors are added to enable bidirectional shifting, then shift direction can be changed, but the circuit complexity increases
Solution Approach 1:
The patent merges the functionality of separate left-shift and right-shift circuits into a single unified structure. By using shared transistors and common clock signals, the design combines what would traditionally require duplicate transistor sets into one efficient circuit that achieves bidirectional operation without simply adding more components.
Solution Approach 2:
The patent segments the shift register into modular stages where each stage can independently control its shifting direction. This segmentation allows the bidirectional functionality to be achieved through coordinated operation of discrete segments rather than requiring a completely reconfigured circuit, managing complexity through modularity.
Data Source
AI summary
A first flipflop outputs a first signal synchronized with a first clock signal. In the first transistor, the first clock signal is input to a first terminal and the second signal is output from a second terminal. In the fourth transistor, a first signal is input to a first terminal and a second terminal is electrically connected to a gate of the first transistor. In the sixth transistor, the third signal is input to a first terminal, a second terminal is electrically connected to the gate of the fourth transistor, and the gate of the sixth transistor is electrically connected to the first terminal.