US3872391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced line driver
Assignee: Liggett Group LLC
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Filing: 1974-01-16
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Granted: 1975-03-18
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Expires: 1994-01-16
Abstract
Abstract A balanced line driver of the type having first and second transistor output stages respectively adapted for driving first and second sides of a balanced line. The first output stage drives the first side of the line directly in response to the driver input signal while current repeater circuitry in the driver establishes a master-slave relationship between the first and second output stages so that the second output stage drives the second side of the line in response to the current on the first side of the line.
Inventors
- 👤 James Edwin Dalley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:29
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/26
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
A driver for a balanced line comprising, first means responsive to an input signal for generating a first output current signal on one side of said balanced line, and second means for generating on the other side of said balanced line a second output current signal substantially equal to said first output current signal, and current repeater means including said second means and responsive to said first output current signal for generating said second output current signal, said current repeater means further including first current repeater stage means responsive to said first output current signal for generating an intermediate current signal and second current repeater stage means responsive to said intermediate signal for generating said second output current signal.
Claim 2
Dependent Claim
119 words
A driver for a balanced line comprising, first means responsive to an input signal for generating a first output current signal on one side of said balanced line, and second means for generating on the other side of said balanced line a second output current signal substantially equal to said first output current signal, and current repeater means including said second means and responsive to said first output current signal for generating said second output current signal, said current repeater means further including first current repeater stage means responsive to said first output current signal for generating an intermediate current signal and second current repeater stage means responsive to said intermediate signal for generating said second output current signal.
Claim 3
Dependent Claim
86 words
The driver of claim 1 wherein said first current repeater stage means includes first and second base-coupled transistors and means for connecting the collector of said first transistor to said one side of said balanced line; wherein said second current repeater stage means includes third and fourth base-coupled transistors and means for connecting the collector of said fourth transistor to said other side of said balanced line; and wherein said current repeater means further includes means for interconnecting the collectors of said second and third transistors.
Claim 4
Dependent Claim
22 words
The driver of claim 2 further comprising means for coupling said input signal to the bases of said first and second transistors.
Claim 5
Dependent Claim
162 words
A driver for a balanced line comprising first means responsive to an input signal for generating a first current on one side of said balanced line and second means responsive to said first current for generating a second current on the other side of said balanced line, said first generating means including a first transistor, means for coupling said input signal to an input terminal of said first transistor, means for coupling a common terminal of said first transistor to a source of potential, and means for coupling an output terminal of said first transistor to said one side of said balanced line, and wherein said second generating means includes a second transistor, means for connecting an input terminal of said second transistor to said input terminal of said first transistor, means for connecting a common terminal of said second transistor to said source of potential, and means responsive to an output current of said second transistor for generating said second current.
Claim 6
Dependent Claim
162 words
A driver for a balanced line comprising first means responsive to an input signal for generating a first current on one side of said balanced line and second means responsive to said first current for generating a second current on the other side of said balanced line, said first generating means including a first transistor, means for coupling said input signal to an input terminal of said first transistor, means for coupling a common terminal of said first transistor to a source of potential, and means for coupling an output terminal of said first transistor to said one side of said balanced line, and wherein said second generating means includes a second transistor, means for connecting an input terminal of said second transistor to said input terminal of said first transistor, means for connecting a common terminal of said second transistor to said source of potential, and means responsive to an output current of said second transistor for generating said second current.
Claim 7
Dependent Claim
62 words
The driver of claim 4 wherein said input signal coupling means includes an input transistor, means for extending said input signal to the base of said input transistor, means for connecting the collector of said input transistor to a source of potential, and means for connecting the emitter of said input transistor to said input terminals of said first and second transistors.
Claim 8
Dependent Claim
83 words
A driver for a balanced line comprising first means responsive to an input signal for generating a first current on one side of said balanced line and second means responsive to said first current for generating a second current on the other side of said balanced line, said second generating means including first current repeater stage means responsive to said first current for generating an intermediate current and second current repeater stage means responsiVe to said intermediate current for generating said second current.
Claim 9
Dependent Claim
83 words
A driver for a balanced line comprising first means responsive to an input signal for generating a first current on one side of said balanced line and second means responsive to said first current for generating a second current on the other side of said balanced line, said second generating means including first current repeater stage means responsive to said first current for generating an intermediate current and second current repeater stage means responsiVe to said intermediate current for generating said second current.
Claim 10
Dependent Claim
108 words
A driver for a balanced line comprising an input terminal, first and second transistors of a first conductivity type, means for providing substantially the same potential at the bases of said first and second transistors, means for coupling an input signal applied to said terminal to the bases of said first and second transistors, means for connecting the collector of said first transistor to one side of said balanced line, means for connecting the emitters of said first and second transistors to a first fixed potential, and means responsive to collector current of said second transistor for generating a current on the other side of said balanced line.
Claim 11
Dependent Claim
108 words
A driver for a balanced line comprising an input terminal, first and second transistors of a first conductivity type, means for providing substantially the same potential at the bases of said first and second transistors, means for coupling an input signal applied to said terminal to the bases of said first and second transistors, means for connecting the collector of said first transistor to one side of said balanced line, means for connecting the emitters of said first and second transistors to a first fixed potential, and means responsive to collector current of said second transistor for generating a current on the other side of said balanced line.
Claim 12
Dependent Claim
70 words
The driver of claim 10 wherein said generating means includes third and fourth base-coupled transistors of a second conductivity type, means for connecting the collector of said fourth transistor to said other side of said balanced line, means for connecting the emitters of said third and fourth transistors to a second fixed potential, and means for connecting the collector of said third transistor to the collector of said second transistor.
Claim 13
Dependent Claim
45 words
The driver of claim 8 wherein said generating means further comprises a fifth transistor, the emitter, base and collector of said fifth transistor being connected to the bases of said third and fourth transistors, the collector of said third transistor, and a fixed potential, respectively.
Claim 14
Dependent Claim
42 words
The driver of claim 7 wherein said coupling means includes an input transistor, the emitter, base and collector of said input transistor being connected to the bases of said first and second transistors, said input terminal, and said second fixed potential, respectively.
References Cited (Backward Citations)
US3714597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |