Sequential Circuit Control for Display Shift Register Noise
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Solution Overview
Problem
Existing electronic circuits, particularly in display devices, face malfunctions due to uncontrollable output signal states caused by noise, leading to improper operation of shift registers and driver circuits.
Innovation Solution
Incorporating a control circuit that sets and controls the state of input signals to sequential circuits, using start, clock, and reset signals to manage the output signal states, thereby preventing malfunctions by ensuring timely and correct voltage state transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sequential circuit operates without control circuitry, then the device complexity is reduced, but the reliability deteriorates due to uncontrollable output states caused by noise
Solution Approach 1:
The control circuit performs preliminary actions by setting the initial states of input signals (start signal, reset signal) before the sequential circuit operates. This ensures that the sequential circuit begins in a known good state and transitions through controlled voltage levels, preventing malfunction from the outset
Solution Approach 2:
The control circuit monitors the output signal from the sequential circuit and uses this feedback to adjust the state of input signals. When the output signal reaches a desired voltage state, the control circuit responds by changing the state of subsequent input signals, creating a closed-loop control system that maintains reliability
2Reliability
If the state of input signals is not controlled, then the ease of operation is improved, but the reliability worsens due to malfunction from noise interference
Solution Approach 1:
The control circuit automatically adjusts the state of input signals based on the output signal from the sequential circuit without requiring external intervention. The system self-regulates by detecting output voltage states and autonomously changing input signal states, maintaining reliability while requiring minimal operational complexity
3Reliability
If voltage state transitions are not synchronized with circuit operation, then the productivity is improved by faster operation, but the reliability deteriorates due to timing errors and malfunctions
Solution Approach 1:
The control circuit uses feedback from the output signal to determine the optimal timing for changing input signal states. By monitoring when the output signal reaches specific voltage states, the control circuit synchronizes input transitions with the natural operation rhythm of the sequential circuit, ensuring reliability without sacrificing productivity
Data Source
AI summary
To control the state of an input signal and output signal of a sequential circuit in order to prevent a malfunction of an electronic circuit. An electronic circuit includes a sequential circuit and a control circuit. A first signal, a second signal, and a third signal are input to the sequential circuit as a start signal, a clock signal, and a reset signal, respectively. The sequential circuit outputs, as an output signal, a fourth signal whose state is set in accordance with the state of the inputted first signal, second signal, and third signal. The control circuit controls the state of the third signal input to the sequential circuit.