Shared-Pad Low-Voltage Redriver Interface With Selective Biasing

The interface circuit dynamically switches between different operating modes (high-speed mode and power-saving mode) based on operational requirements. In high-speed mode, the circuit operates at higher voltage for maximum data transmission rate, while in power-saving mode, it operates at lower voltage to conserve battery life. This dynamic adaptation resolves the contradiction by allowing the system to optimize between energy consumption and data transmission rate depending on the current operational context.

A shared impedance network is introduced as an intermediary element that mediates between the transmitter and receiver when they share common input/output pads. This impedance network provides the necessary biasing for both the transmitter and receiver simultaneously, enabling them to operate correctly despite sharing the same pads. The intermediary impedance structure resolves the biasing conflict that would otherwise degrade interface performance while allowing pad sharing to reduce device complexity.

The interface circuit employs periodic mode switching between high-speed and power-saving modes based on data transmission requirements. During active data transmission periods, the circuit operates in high-speed mode to maximize productivity. During idle or low-activity periods, it transitions to power-saving mode to minimize energy consumption. This periodic action pattern allows the system to achieve high overall productivity while maintaining low average energy consumption.