Memory Repeater Circuit for Fast Word Line Discharge
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Solution Overview
Problem
The existing memory technologies face a challenge with excessively slow discharge speed of word lines in memory arrays, which affects the efficiency of programming operations.
Innovation Solution
The introduction of a repeater in the peripheral circuit of the memory system, which receives a first control signal from the driver and outputs a second control signal to the discharge circuit, reduces the length of the routing metal line and enhances the discharge speed by lowering signal loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the driver directly drives the discharge circuit through a long routing metal line, then the device complexity is reduced, but the discharge speed becomes excessively slow due to signal loss
Solution Approach 1:
The patent introduces a repeater as an intermediary component between the driver and the discharge circuit. The repeater receives the first control signal from the driver and outputs a second control signal to the discharge circuit, effectively mediating the signal transmission. This intermediary structure reduces signal loss over long routing metal lines and improves discharge speed without requiring the driver to directly drive the discharge circuit across the entire distance.
Solution Approach 2:
The patent segments the control signal transmission path into two parts: the driver to the repeater, and the repeater to the discharge circuit. By dividing the long routing metal line into shorter segments, the signal loss in each segment is reduced, allowing the discharge circuit to be driven more effectively. The repeater acts as a signal regeneration point that resets the signal strength for the second segment.
2Loss of energy
If the routing metal line length is reduced by adding a repeater, then the signal loss is lowered and discharge speed improves, but the device complexity increases
Solution Approach 1:
The repeater serves as an intermediary that actively compensates for signal loss in the routing metal line. By placing the repeater at an optimal position, the total routing distance is divided into manageable segments, each with acceptable signal loss characteristics. The repeater regenerates the control signal, ensuring that the second segment from the repeater to the discharge circuit experiences minimal signal loss.
Solution Approach 2:
The patent changes the electrical parameters of the control signal transmission by introducing the repeater, which actively regenerates and retransmits the signal. This parameter change (from passive signal degradation to active signal regeneration) compensates for the increased device complexity by providing a tangible improvement in signal integrity and discharge speed.
3Speed
If the driver has high drive capability to drive the discharge circuit directly, then the discharge speed is improved, but the device complexity and power consumption increase
Solution Approach 1:
The patent segments the drive function between the driver and the repeater. The driver only needs to provide sufficient drive capability to reach the repeater, which is a much shorter distance than driving the discharge circuit directly. The repeater then provides the necessary drive capability for the second segment to the discharge circuit. This segmentation allows both components to operate at lower power levels while achieving the same overall discharge speed.
Solution Approach 2:
The repeater acts as an intermediary that分担 (shares) the drive burden. Instead of the driver bearing the full burden of driving the discharge circuit across a long distance, the repeater takes over part of this burden. This reduces the power consumption and complexity requirements of the driver while maintaining effective discharge circuit operation.
Data Source
AI summary
A memory includes a peripheral circuit and a memory array. The memory array includes word lines. The peripheral circuit includes a driver, a repeater, and a discharge circuit. An output terminal of the driver is coupled with a controlled terminal of the repeater. An output terminal of the repeater is coupled with a controlled terminal of the discharge circuit. The discharge circuit is coupled with a word line in the memory array. The driver is configured to output a first control signal to the repeater. The repeater is configured to output a second control signal to the discharge circuit according to the first control signal.