Programmable logic integrated circuit devices with low voltage differential signaling capabilities

US6236231A · kind A · utility

Assignee

• Altera Corporation · US

Inventors

• Khai Nguyen · San Jose, US
• Xiaobao Wang · Santa Clara, US
• In Whan Kim · San Jose, US
• Chiakang Sung · Milpitas, US
• Richard G. Cliff · Milpitas, US
• Joseph Huang · معلمی نژاد, US
• Bonnie I. Wang · Cupertino, US
• Wayne Yeung · San Francisco, US

Key dates

• Filing date: Jun 25, 1999
• Grant date: May 22, 2001
• Expiry date: Jun 25, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03K19/17784
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

A programmable logic device is equipped for low voltage differential signaling ("LVDS") by providing an LVDS input buffer and/or an LVDS output buffer on the device. I/O pins on the device that are used together in pairs for LVDS can alternatively be used individually for other types of signaling. The LVDS buffers are constructed to give good performance and to meet LVDS specifications despite variations due to temperature, manufacturing process inconsistency, and power supply changes.