Remote two-wire data entry method and device
Abstract
This invention is comprised of a device for detecting switch closure such as in a keypad for entering data comprising a matrix of conductor pairs and switches, each pair of conductors shorted by the pressing of a particular switch, and current-regulating devices on each conductor for limiting current in one direction and passing it without limit in the other direction. The device is driven by alternating current. The ends of the conductors in a conductor pair limit current of opposing polarities with respect to each other so that the signal on a shorted pair is an alternating current signal with a unique combination of a positive and a negative peak, which, when analyzed, allows the determination of which key was pressed. The binary identification of the pressed key is passed to the input port of a host device.
- Inventors:
- Issue Date:
- Research Org.:
- Savannah River Site (SRS), Aiken, SC (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 10166589
- Patent Number(s):
- 7720128
- Application Number:
- ON: DE93015716; PAN: 7-720,128
- Assignee:
- Dept. of Energy
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
- DOE Contract Number:
- AC09-89SR18035
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 1991
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; SWITCHING CIRCUITS; DESIGN; COMPUTERS; RECORDING SYSTEMS; DATA ACQUISITION SYSTEMS; INVENTIONS; SWITCHES; 426000; 990200; COMPONENTS, ELECTRON DEVICES AND CIRCUITS; MATHEMATICS AND COMPUTERS
Citation Formats
Kronberg, J W. Remote two-wire data entry method and device. United States: N. p., 1991.
Web.
Kronberg, J W. Remote two-wire data entry method and device. United States.
Kronberg, J W. Tue .
"Remote two-wire data entry method and device". United States. https://www.osti.gov/servlets/purl/10166589.
@article{osti_10166589,
title = {Remote two-wire data entry method and device},
author = {Kronberg, J W},
abstractNote = {This invention is comprised of a device for detecting switch closure such as in a keypad for entering data comprising a matrix of conductor pairs and switches, each pair of conductors shorted by the pressing of a particular switch, and current-regulating devices on each conductor for limiting current in one direction and passing it without limit in the other direction. The device is driven by alternating current. The ends of the conductors in a conductor pair limit current of opposing polarities with respect to each other so that the signal on a shorted pair is an alternating current signal with a unique combination of a positive and a negative peak, which, when analyzed, allows the determination of which key was pressed. The binary identification of the pressed key is passed to the input port of a host device.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1991},
month = {Tue Jan 01 00:00:00 EST 1991}
}