Patent US3401352A successfully refreshed from Google Patents.
US3401352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-port network for realizing transfer functions
Assignee: AT&T Inc
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Filing: 1966-12-29
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Granted: 1968-09-10
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Expires: 1986-12-29
Abstract
No abstract record available.
Inventors
- 👤 Sanjit K Mitra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:16
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/04; H03H11/12; H03H11/126; H03H11/1217
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
254 words
AN ACTIVE TWO-PORT NETWORK COMPRISING, IN COMBINATION, A FIRST SECTION COMPRISING TWO INPUT TERMINALS AND TWO OUTPUT TERMINALS A FIRST OF EACH OF SAID TERMINALS BEING CONNECTED TO GROUND, A FIRST AMPLIFIER HAVING A GAIN 1+A, TWO INPUT TERMINALS AND AN OUTPUT TERMINAL, A FIRST OF SAID FIRST AMPLIFIER INPUT TERMINALS BEING CONNECTED TO SAID SECOND OF SAID FIRST SECTION INPUT TERMINALS AND THE SECOND OF SAID AMPLIFIER INPUT TERMINALS BEING CONNECTED TO GROUND, MEANS CONNECTING SAID AMPLIFIER OUTPUT TERMINAL TO THE SECOND OUTPUT TERMINAL OF SAID FIRST SECTION, AN R-C NETWORK HAVING AN ADMITTANCE Y1 CONNECTED ACROSS SAID INPUT TERMINALS OF SAID FIRST AMPLIFIER, A SECOND R-C CIRCUIT HAVING AN ADMITTANCE Y2 CONNECTED BETWEEN SAID FIRST SECTION INPUT AND OUTPUT TERMINALS, A SECOND SECTION HAVING TWO INPUT TERMINALS AND TWO OUTPUT TERMINALS A FIST OF SAID TERMINALS BEING CONNECTED TO GROUND, A SECOND AMPLIFIER HAVING A GAIN -U, TWO INPUT TERMINALS AND AN OUTPUT TERMINAL A FIRST OF SAID SECOND AMPLIFIER INPUT TERMINALS BEING CONNECTED TO SAID SECOND OF SAID SECOND SECTION INPUT TERMINALS AND THE SECOND OF SAID SECOND AMPLIFIER INPUT TERMINALS BEING CONNECTED TO GROUND, AN R-C CIRCUIT HAVING AN ADMITTANCE YB CONNECTED BETWEEN THE OUTPUT OF SAID SECOND AMPLIFIER AND THE SECOND OUTPUT TERMINAL OF SAID SECON SECTION, AN R-C CIRCUIT HAVING AN ADMITTANCE YA CONNECTED BETWEEN SAID SECOND OUTPUT TERMINAL OF SAID SECOND SECTION AND THE SECOND INPUT TERMINAL OF SAID SECOND SECTION, AND MEANS INTERCONNECTING THE PORTS OF SAID SECTIONS SO THAT A GENERAL TRANSFER FUNCTION IS GENERATED.
Claim 2
Dependent Claim
254 words
AN ACTIVE TWO-PORT NETWORK COMPRISING, IN COMBINATION, A FIRST SECTION COMPRISING TWO INPUT TERMINALS AND TWO OUTPUT TERMINALS A FIRST OF EACH OF SAID TERMINALS BEING CONNECTED TO GROUND, A FIRST AMPLIFIER HAVING A GAIN 1+A, TWO INPUT TERMINALS AND AN OUTPUT TERMINAL, A FIRST OF SAID FIRST AMPLIFIER INPUT TERMINALS BEING CONNECTED TO SAID SECOND OF SAID FIRST SECTION INPUT TERMINALS AND THE SECOND OF SAID AMPLIFIER INPUT TERMINALS BEING CONNECTED TO GROUND, MEANS CONNECTING SAID AMPLIFIER OUTPUT TERMINAL TO THE SECOND OUTPUT TERMINAL OF SAID FIRST SECTION, AN R-C NETWORK HAVING AN ADMITTANCE Y1 CONNECTED ACROSS SAID INPUT TERMINALS OF SAID FIRST AMPLIFIER, A SECOND R-C CIRCUIT HAVING AN ADMITTANCE Y2 CONNECTED BETWEEN SAID FIRST SECTION INPUT AND OUTPUT TERMINALS, A SECOND SECTION HAVING TWO INPUT TERMINALS AND TWO OUTPUT TERMINALS A FIST OF SAID TERMINALS BEING CONNECTED TO GROUND, A SECOND AMPLIFIER HAVING A GAIN -U, TWO INPUT TERMINALS AND AN OUTPUT TERMINAL A FIRST OF SAID SECOND AMPLIFIER INPUT TERMINALS BEING CONNECTED TO SAID SECOND OF SAID SECOND SECTION INPUT TERMINALS AND THE SECOND OF SAID SECOND AMPLIFIER INPUT TERMINALS BEING CONNECTED TO GROUND, AN R-C CIRCUIT HAVING AN ADMITTANCE YB CONNECTED BETWEEN THE OUTPUT OF SAID SECOND AMPLIFIER AND THE SECOND OUTPUT TERMINAL OF SAID SECON SECTION, AN R-C CIRCUIT HAVING AN ADMITTANCE YA CONNECTED BETWEEN SAID SECOND OUTPUT TERMINAL OF SAID SECOND SECTION AND THE SECOND INPUT TERMINAL OF SAID SECOND SECTION, AND MEANS INTERCONNECTING THE PORTS OF SAID SECTIONS SO THAT A GENERAL TRANSFER FUNCTION IS GENERATED.
References Cited (Backward Citations)
US2998580A
Cited
US3045194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |