Patent US3671671A successfully refreshed from Google Patents.
US3671671A
Expired / Lapsed
US
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Pulse transmitting and receiving systems
Assignee: Yokogawa Electric Corp
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Filing: 1970-06-10
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Granted: 1972-06-20
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Expires: 1990-06-10
Abstract
Abstract A pulse transmitting and receiving system comprises a transmission circuit including a balanced pair transmission line, impedances having the same characteristic impedance as the transmission circuit and connected on the opposite ends thereof, a pulse transmission circuit connected across the transmission lines so as to cause currents of equal magnitude but of opposite polarities to flow through transmission lines and a pulse receiving circuit including a differential amplifier responsive to the variation in the potentials of the transmission lines caused by the flow of the currents.
Inventors
- 👤 Kazutaka Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:06
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/0264; H04L25/028; H04L25/0282; H04L25/0272; H04L25/0298; H04L25/10; H04L25/0292; H04L25/0294
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
A pulse transmitting and receiving system comprising a transmission circuit including a balanced pair transmission line, impedances having the same characteristic impedance as said transmission line and connected on the opposite ends of said line, bias circuit means for normally biasing the conductors of said transmission line at predetermined different voltage levels, a pulse transmission circuit including constant current source means connected across said transmission line and selectively operable for supplying a constant value of current to the low voltage level conductor and receiving the same value of current from the high voltage level conductor of said line, and a pulse receiving circuit including a differential amplifier responsive to the variation in the potentials between conductors of said transmission line created by the flow of said current, said system adapted to invert the voltage level of said conductors upon selective supplying of constant current from said source means to and from said conductors.
Claim 2
Dependent Claim
153 words
A pulse transmitting and receiving system comprising a transmission circuit including a balanced pair transmission line, impedances having the same characteristic impedance as said transmission line and connected on the opposite ends of said line, bias circuit means for normally biasing the conductors of said transmission line at predetermined different voltage levels, a pulse transmission circuit including constant current source means connected across said transmission line and selectively operable for supplying a constant value of current to the low voltage level conductor and receiving the same value of current from the high voltage level conductor of said line, and a pulse receiving circuit including a differential amplifier responsive to the variation in the potentials between conductors of said transmission line created by the flow of said current, said system adapted to invert the voltage level of said conductors upon selective supplying of constant current from said source means to and from said conductors.
Claim 3
Dependent Claim
31 words
The pulse transmitting and receiving system according to claim 1 wherein a plurality of pulse transmission circuits and a plurality of pulse receiving circuits are connected to said balanced transmission circuit.
Claim 4
Dependent Claim
66 words
The pulse transmitting and receiving system according to claim 1 wherein said pulse transmission circuit comprises a switching transistor turned ON and OFF by a pulse signal, and two complimentary transistors rendered ON and OFF by the operation of said switching transistor, each of said complimentary transistors comprising a constant current circuit and being connected to a different one of said conductors of said transmission line.
Claim 5
Dependent Claim
57 words
The pulse transmitting and receiving system according to claim 1 wherein said pulse receiving circuit comprises a differential amplifier constituted by a pair of transistors, the emitter electrodes thereof are connected in common, the base electrodes are connected to receive differential signals from said conductors and one of the collector electrodes is connected to an output terminal.
Claim 6
Dependent Claim
58 words
The pulse transmitting and receiving system according to claim 3 and wherein said pulse receiving circuit comprises a differential amplifier constituted by a pair of transistors, the emitter electrodes thereof are connected in common, the base electrodes are connected to receive differential signals from said conductors and one of the collector electrodes is connected to an output terminal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |