One-wire device with A-to-D converter

Details One-wire device with A-to-D converter One-wire device with A-to-D converter

1998-04-13

2001-05-29

Wamsley, Patrick (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S120000

Reexamination Certificate

active

06239732

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a device capable of changing an analog signal to a digital signal and then communicating the converted signal over a single wire bus to a host. More particularly, the present invention relates to a quad input analog to digital converter which converts a plurality of analog signals into a plurality of digital signals that can be communicated over a single wire bidirectional communication bus.
2. Description of Related Art
Analog to digital converters (A-to-D) converters have become common in the electronic industry. In general, an A-to-D converter receives an analog signal and converts the signal into a digital signal. The resulting digital signal is sent in parallel form or in serial form over multi-wire busses.
When an analog signal is sent over a long wire connected to a host system, the integrity of the analog signal decreases over the length of the connection. Conversely, a digital signal's integrity is much less likely to decrease over the same long wire connection. Yet, a drawback of A-to-D converters is that they consume a large amount of energy while performing an A-to-D conversion. Furthermore, A-to-D converters are difficult to incorporate into an analog sensor that is remotely positioned to take an analog reading in a remote location. A-to-D converters require multiple wires to connect the A-to-D converter to a system which uses the digitized output of the converter.
SUMMARY OF THE INVENTION
There is a need for a low power, A-to-D converter that can be coupled directly to an analog sensor and provide a digitized signal over as few wires as possible and over a long length of wire to a system or host system that is to use the digitized signal. Such a device would increase the integrity of the signal sensed at a remote location because the signal would be digitized at the remote location instead of after traveling the full, long length of the wire connecting the remotely placed analog device to a host system.
The present invention responds to this need by providing an A-to-D converter that takes an analog voltage level on one of its input pins and converts the analog voltage level to a digital words which can be output via a single wire bus. The single wire bus can be a one-wire data bus which uses a one-wire protocol.


REFERENCES:
patent: 5036320 (1991-07-01), Wroblewski
patent: 5168276 (1992-12-01), Huston et al.
patent: 5319370 (1994-06-01), Signore et al.
patent: 5679944 (1997-10-01), Cusey et al.
patent: 5877720 (1999-03-01), Setty et al.
patent: 6005424 (1999-12-01), Douglass
Kymissis et al, “Parasitic Power Harvesting in Shoes,” IEEE, p. 136, 1998.

Affiliated with

Also associated with

Rating

One-wire device with A-to-D converter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with One-wire device with A-to-D converter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and One-wire device with A-to-D converter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2506585