PCB Passive Filter Equalization for Storage Interface Signals
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Solution Overview
Problem
Storage devices face challenges in enhancing signal integrity and reducing power consumption due to high-frequency signal transmission, which affects their performance and efficiency in data storage and retrieval.
Innovation Solution
Incorporating a passive filter, comprising a filter resistor and capacitor connected in parallel, between the storage controller and the connector on a printed circuit board (PCB) to equalize signals, thereby improving signal integrity and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-frequency signals are transmitted from the storage device to the host, then data transmission speed is improved, but signal integrity deteriorates
Solution Approach 1:
A passive filter circuit is introduced as an intermediary component between the storage controller and the connector. This filter includes a first capacitor connected in parallel with a first resistor, and a second capacitor connected in parallel with a second resistor. The passive filter acts as a mediator that equalizes the high-frequency signals transmitted to the host, thereby maintaining signal integrity while preserving high-speed data transmission capability.
2Speed
If high-frequency signals are transmitted from the storage device to the host, then data transmission speed is improved, but power consumption increases
Solution Approach 1:
The passive filter circuit serves as an intermediary that equalizes signals before they reach the host. By improving signal integrity through this passive equalization process, the need for additional active signal conditioning and retransmission is reduced, thereby lowering overall power consumption while maintaining high-speed transmission capability.
3Reliability
If passive filter is added between connector and storage controller, then signal integrity is improved, but device complexity increases
Solution Approach 1:
The patent employs passive filter components (resistors and capacitors) that are simple, inexpensive, and reliable. These passive elements provide signal equalization without the complexity of active components, achieving improved signal integrity while minimizing the increase in device complexity. The passive nature of these components means they require no power and have no moving parts, keeping the overall system simple.
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
The solution enhances signal integrity of high-frequency signals output from the storage device to the host, leading to reduced power consumption and improved performance in data transmission.
Implementation Method 1
at least one passive filter connected between the connector and the storage controller and equalizing either a signal provided to the storage controller or a signal provided from the storage controller
Data Source
AI summary
A storage device is provided. The storage device includes nonvolatile memory devices provided on a printed circuit board (PCB), a connector, a storage controller and at least one first passive filter. The connector is provided in the PCB and includes connection terminals. The storage controller is provided on the PCB, communicates with an external host through the connection terminals and controls the nonvolatile memory devices. The at least one first passive filter is provided in the PCB, is connected between the connector and the storage controller, and performs an equalization on either a signal provided to the storage controller or a signal provided from the storage controller.