Title:
CIRCUIT FOR PRODUCING LOW-VOLTAGE DIFFERENTIAL SIGNALS
Document Type and Number:
WIPO Patent Application WO2002021684
Kind Code:
A3
Abstract:
Described are systems for producing differential logic signals. These systems can be adapted for use with different loads by programming one or more programmable elements. One embodiment includes a series of driver stages, the outputs of which are connected to one another. The driver stages turn on successively to provide increasingly powerful differential amplification. This progressive increase in amplification produces a corresponding progressive decrease in output resistance, which reduces the noise associated with signal reflection. The systems can be incorporated into programmable IOBs to enable PLDs to provide differential output signals.
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Inventors:
GHIA ATUL V
MENON SURESH M
SCHULTZ DAVID P
MENON SURESH M
SCHULTZ DAVID P
Application Number:
PCT/US2001/027233
Publication Date:
February 27, 2003
Filing Date:
August 31, 2001
Export Citation:
Assignee:
XILINX INC (US)
International Classes:
H03K19/173; H03F3/45; H03K5/151; H03K19/0175; H04L25/02; (IPC1-7): H03K19/0175; H03K19/00; H03K19/173; H04L25/02
Foreign References:
| US5949253A | 1999-09-07 | |||
| US6281715B1 | 2001-08-28 | |||
| US5977796A | 1999-11-02 | |||
| EP0788059A1 | 1997-08-06 | |||
| US6278300B1 | 2001-08-21 | |||
| US6025742A | 2000-02-15 |
Other References:
See also references of EP 1316146A2
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