Adaptive Feedback Receiving Circuit for Narrow-Pulse Detection
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Solution Overview
Problem
Semiconductor memory devices face challenges in accurately detecting input signals with large amplitudes and shortened pulse widths due to difficulties in signal detection by receiving circuits.
Innovation Solution
A receiving circuit with an amplifier and control unit that adjusts feedback resistance based on input signal amplitude, reducing the output signal amplitude when it exceeds a specific value, thereby enabling accurate detection even with high-speed signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the pulse width of the input signal is shortened to increase signal transmission speed, then the transmission speed is improved, but the receiving circuit has difficulty in appropriately detecting the input signal logic level
Solution Approach 1:
The feedback resistance is made dynamically adjustable based on the amplitude of the input signal. The control unit changes the feedback resistance value according to whether the input signal amplitude exceeds a reference value, allowing the receiving circuit to adapt to different signal conditions and maintain detection accuracy at high transmission speeds
Solution Approach 2:
The feedback resistance parameter is changed based on the input signal amplitude. When the input signal amplitude is large, the feedback resistance is reduced to limit the output signal amplitude, ensuring the output remains within the detectable range for shortened pulse widths
2Power
If the amplitude of the input signal is large, then the output signal amplitude from the amplifier is larger, but the receiving circuit cannot appropriately detect the input signal logic level when pulse width is shortened
Solution Approach 1:
A feedback mechanism is implemented where the control unit monitors the input signal amplitude and adjusts the feedback resistance accordingly. When the input signal amplitude is large, the feedback resistance is reduced to prevent the output signal amplitude from becoming too large, ensuring accurate detection of the logic level even with shortened pulse widths
Solution Approach 2:
The feedback resistance parameter is dynamically changed based on the input signal amplitude to control the output signal amplitude. This parameter adjustment ensures that the output signal remains within an appropriate range for detection regardless of the input signal strength
Data Source
AI summary
A receiving circuit is provided. The receiving circuit includes an amplifier and a control unit. The receiving circuit has a plurality of input terminals and an output terminal. The amplifier is configured to receive an input signal through one of the plurality of input terminals and generate an output signal at the output terminal by amplifying the input signal. The control unit is configured to receive the output signal and provide a feedback resistance based on the input signal. The feedback resistance provided by the control unit when an amplitude of the input signal is greater than or equal to a specific value is smaller than the feedback resistance provided by the control unit when the amplitude of the input signal is less than the specific value.