Patent US3700831A successfully refreshed from Google Patents.
US3700831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid circuit
Assignee: US Philips Corp
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Filing: 1971-01-08
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Granted: 1972-10-24
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Expires: 1991-01-08
Abstract
Abstract Hybrid circuit for coupling a two-direction transmission path with a one-direction transmitting path and a one-direction receiving path, the arrangement comprising a first amplifier whose input is connected to the receiving path and whose output is connected to the two-direction transmission path, a second amplifier whose input is connected to the two-direction transmission path and whose output is connected to the transmitting path and a third amplifier whose input is connected to the receiving path and whose output is connected to the transmitting path, wherein the second amplifier is a directvoltage differential amplifier and the first amplifier comprises a balanced direct-voltage-coupled output, while a damping network is connected between the two-direction transmission path and the input of the second amplifier.
Inventors
- 👤 Einar Andreas Aagaard
- 👤 Johannes Anton Greefkes
- 👤 Adrianus Wilhelmus Maria Enden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:20
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/005; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/54; H04B1/58; H04B1/586; H04M19/00; H04M19/001; H04M19/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A hybrid circuit arrangement for coupling a two-direction transmission path with a one-direction transmitting path and a one-direction receiving path, said arrangement comprising a first amplifier whose input iS connected to the receiving path and whose output is connected to the two-direction transmitting path, a switchable current source connected to the first amplifier and coupled with the receiving path for providing current to the first amplifier in response to a voltage in the receiving path in excess of a threshold value, a second amplifier whose input is connected to the two-direction transmission path and whose output is connected to the one-direction transmitting path and a third amplifier whose input is connected to the receiving path and whose output is connected to the transmitting path, characterized in that the second amplifier is a direct-voltage differential amplifier and the first amplifier comprises a balanced directvoltage-coupled output and in that a damping network is connected between the two-direction transmission path and the input of the second amplifier.
Claim 2
Dependent Claim
164 words
A hybrid circuit arrangement for coupling a two-direction transmission path with a one-direction transmitting path and a one-direction receiving path, said arrangement comprising a first amplifier whose input iS connected to the receiving path and whose output is connected to the two-direction transmitting path, a switchable current source connected to the first amplifier and coupled with the receiving path for providing current to the first amplifier in response to a voltage in the receiving path in excess of a threshold value, a second amplifier whose input is connected to the two-direction transmission path and whose output is connected to the one-direction transmitting path and a third amplifier whose input is connected to the receiving path and whose output is connected to the transmitting path, characterized in that the second amplifier is a direct-voltage differential amplifier and the first amplifier comprises a balanced directvoltage-coupled output and in that a damping network is connected between the two-direction transmission path and the input of the second amplifier.
Claim 3
Dependent Claim
83 words
A hybrid circuit arrangement for coupling a two-direction transmission path with a one-direction transmitting path and a one-direction receiving path, said arrangement comprising a first two-transistor amplifier having an input connected to the receiving path, each transistor of the first amplifier having an emitter connected to a current source, means connecting the collectors of the transistors of the first amplifier to the two-direction transmission path, and means connecting the collectors of the transistors in the first amplifier to different points of constant potential.
Claim 4
Dependent Claim
83 words
A hybrid circuit arrangement for coupling a two-direction transmission path with a one-direction transmitting path and a one-direction receiving path, said arrangement comprising a first two-transistor amplifier having an input connected to the receiving path, each transistor of the first amplifier having an emitter connected to a current source, means connecting the collectors of the transistors of the first amplifier to the two-direction transmission path, and means connecting the collectors of the transistors in the first amplifier to different points of constant potential.
References Cited (Backward Citations)
US3453395A
Cited
US3530260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |