Subscriber station network
AssigneesUnited Networks, Inc., Manu-Tronics, Inc.
InventorsJan Synek, Michael Tentler
Life of this patent
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Abstract
A solid state network for subscriber station is amenable to hybridization and mass production, minimizing costly, heavy components, facilitating transmission and reception of communication signals almost independently of variation in line impedance, and controlling a sidetone level with in-phase signals, through the use of as few as one transmitting transistor that is in series with the transmitter and also in series with the receiver, and as few as one receiving transistor.
Claims7
An improved subscriber station network for a telephone system including telephone lines for connecting said subscriber station to other telephone subscriber stations,
- said telephone system comprising at least two lines having a DC potential therebetween,
- telephone receiver means for receiving communications from said lines,
- telephone transmitter means for transmitting communication signals over said lines,
- the improvement characterized in that a transmitter transistor means is provided in a series circuit with said transmitter means,
- said series circuit coupled between said at least two lines,
- means connecting said transmitter transistor to said receiver means to control the level of the signal passing through said receiver means,
- bridge means for maintaining one of said at least two lines at a positive potential and the other of said at least two lines at a negative potential,
- receiver transistor means provided in said receiver means, and
- means for connecting said receiver transistor means through said receiver means to said transmitter means where said transmitter means connects said transmitter transistor means to said series circuit.
Dependencies are inferred from the claim text.