Low-Voltage Low-Power Switchable Current Sources (SCS) LVDS Driver

Chien-Hsun Lee, Evan Li

Abstract

In this paper, a sub-2.0V low-power switchable current sources (SCS) LVDS driver is proposed. Low power differential signaling (LVDS) is an IEEE standard for Gigabit/s serial data transmission and forms the physical layer for many modern I/O protocols like PCI express (Intel), Hypertransport (AMD), and SERDES (IBM).

Conventional LVDS drivers cannot operate with low voltage supplies due to a lack of headroom. Our proposed design allows low voltage supplies to be used especially in low-power applications. In addition, a common mode feedback loop ensures that DC bias currents and voltages do not change as a result of process and temperature variations (PVT). Load impedance is 50Ohms.

References

  1. M Chen, J S Martinez, M Nix, M E Robinson, "Low-voltage Low-power LVDS drivers," IEEE JNL Solid State Circuits vol. 40, No. 2, Feb 2005.
  2. A. Boni, A Pierazzi, D Vecchi, "LVDS I/O Interface for Gb/s-per-pin Operation in 0.35um CMOS," IEEE JNL Solid State Circuits vol. 36, No. 4, Apr 2001.

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