US3718762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse transmitting apparatus
Assignee: Yokogawa Electric Corp
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Filing: 1970-07-16
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Granted: 1973-02-27
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Expires: 1990-07-16
Abstract
Abstract A pulse transmitting apparatus comprising a first transmission line connected to a current drive circuit at one end, a second transmission line stranded with the first and having an end connected to a receiver circuit located adjacent the drive circuit, and a pair of serial connected switches at the transmitting end of the apparatus for connecting together the other ends of the first and second transmission lines and sending a current pulse signal to the receiver circuit. The switches are operated simultaneously in response to an input signal and the apparatus contains means for absorbing pulses reflected back from the receiving end to the transmitting end of the apparatus.
Inventors
- 👤 K Watanabe
- 👤 T Iritani
- 👤 K Nezu
- 👤 Z Imabayashi
- 👤 K Kataoka
- 👤 M Yoshioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:46
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/20; H03; H03K; H03K19/00; H03K19/0175; H03K19/017545; H04L25/00; H04L25/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
A high speed pulse transmitting apparatus comprising a drive circuit to generate a current signal, a transmission line, an input switching circuit including a plurality of serially connected switching elements adapted to interrupt said current signal to form a current pulse signal and to apply the same to said transmission line in response to being simultaneously operated by an input pulse signal, and a plurality of receiver circuits, each of which is connected to said transmission line to receive said current pulse signal transmitted over said transmission line and adapted to produce an output signal corresponding to said current pulse signal.
Claim 2
Dependent Claim
101 words
A high speed pulse transmitting apparatus comprising a drive circuit to generate a current signal, a transmission line, an input switching circuit including a plurality of serially connected switching elements adapted to interrupt said current signal to form a current pulse signal and to apply the same to said transmission line in response to being simultaneously operated by an input pulse signal, and a plurality of receiver circuits, each of which is connected to said transmission line to receive said current pulse signal transmitted over said transmission line and adapted to produce an output signal corresponding to said current pulse signal.
Claim 3
Dependent Claim
119 words
A pulse transmitting apparatus comprising a pulse signal transmitting circuit, a receiver circuit adapted to receive said pulse signal from said transmitting circuit, a first transmission line interconnecting said transmitting circuit and said receiver circuit for carrying said pulse signal, a terminal resistor connected to said pulse transmitting circuit, a second transmission line connected between said terminal resistor and said receiver circuit in parallel with said first transmission line, and means to disconnect said terminal resistor from said first transmission line when transmitting said pulse signal and to connect said terminal resistor to said first transmission line when said pulse is reflected by said receiver circuit and reaches said transmitting circuit so that said resistor absorbs said reflected pulse.
Claim 4
Dependent Claim
119 words
A pulse transmitting apparatus comprising a pulse signal transmitting circuit, a receiver circuit adapted to receive said pulse signal from said transmitting circuit, a first transmission line interconnecting said transmitting circuit and said receiver circuit for carrying said pulse signal, a terminal resistor connected to said pulse transmitting circuit, a second transmission line connected between said terminal resistor and said receiver circuit in parallel with said first transmission line, and means to disconnect said terminal resistor from said first transmission line when transmitting said pulse signal and to connect said terminal resistor to said first transmission line when said pulse is reflected by said receiver circuit and reaches said transmitting circuit so that said resistor absorbs said reflected pulse.
Claim 5
Dependent Claim
73 words
The pulse transmitting apparatus according to claim 2 and further including a constant current source located adjacent said receiver circuit, a third transmission line interconnecting said source with said transmitting circuit and paralleling said first and second transmission lines for providing said transmitting circuit with a current signal, and wherein said transmitting circuit comprises a switch adapted to apply said current signal to said first transmission line in response to an input signal.
Claim 6
Dependent Claim
40 words
The pulse transmitting apparatus according to claim 3 wherein said first and third transmission lines are stranded with each other, whereby noise currents from said first and third lines arising from the transmission of said current signal are substantially reduced.
Claim 7
Dependent Claim
59 words
A pulse transmitting apparatus comprising a transmission line, a constant current circuit, a terminal resistor associated with said transmission line, a first switch responsive to an input signal to apply the output from said constant current circuit to said transmission line, and a second switch responsive to said input signal to disconnect said terminal resistor from said transmission line.
Claim 8
Dependent Claim
59 words
A pulse transmitting apparatus comprising a transmission line, a constant current circuit, a terminal resistor associated with said transmission line, a first switch responsive to an input signal to apply the output from said constant current circuit to said transmission line, and a second switch responsive to said input signal to disconnect said terminal resistor from said transmission line.
Claim 9
Independent Claim
123 words
An apparatus for transmitting signals from a first to a second location comprising first and second transmission lines stranded together and extending between said two locations, a drive circuit for applying a current signal to said first line at said second location, a switch at said first location connected between said first and second lines, said switch being adapted to selectively apply said current signal on said first line to said second line in response to an input signal, and a receiver circuit located at said seCond location and adapted to receive said selectively applied current signal on said second line, whereby noise currents from said first and second stranded transmission lines arising from the transmission of said current signal are substantially reduced.
Claim 10
Independent Claim
123 words
An apparatus for transmitting signals from a first to a second location comprising first and second transmission lines stranded together and extending between said two locations, a drive circuit for applying a current signal to said first line at said second location, a switch at said first location connected between said first and second lines, said switch being adapted to selectively apply said current signal on said first line to said second line in response to an input signal, and a receiver circuit located at said seCond location and adapted to receive said selectively applied current signal on said second line, whereby noise currents from said first and second stranded transmission lines arising from the transmission of said current signal are substantially reduced.
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |