Telemetry system with signal booster for digital data transmission through a transmission line
US4468785A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 1981 |
| Grant date | Aug 28, 1984 |
| Priority date | — |
| Expiry date | Nov 20, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A telemetry system for sensing remote physical events and for transmitting and boosting a digital data signal representing the sensed events on a transmission line, which comprises a master clock and a plurality of sensing stations for sensing local data. The sensing stations inject local data onto the transmission line as a digital data signal, and a controller/receiver receives the digital data. The master clock initializes the system timing and generates a sync signal. Each sensing station includes a booster subsystem for receiving the local digital data and for injecting the digital data onto the transmission line as a digital data signal. During system start up, each booster subsystem claims a slot, in accordance with an organizational process, for injecting the digital data signal onto the transmission line. The booster subsystem in each sensing station further includes a booster circuit for boosting the digital data signals which are propagating on the transmission line, as well as the sync signal. The booster circuit comprises a negative impedance bistable device for enhancing the amplitude and rise time of the digital data signal. Each booster subsystem further includes a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.