US3239780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulator having variable magnitude impedance for regulating the operating attenuation
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1963-07-30
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Granted: 1966-03-08
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Expires: 1983-07-30
Abstract
No abstract record available.
Inventors
- 👤 Echarti Friedrich Karl Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:04
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/542; H03C1/545
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
229 words
A MODULATOR COMPRISING: AN INPUT MEANS INCLUDING FIRST, SECOND AND THRID INPUT TERMINALS, AND FIRST AND SECOND OUTPUT TERMINALS, SAID FIRST AND SECOND INPUT TERMINALS FOR RECEIVING A MODULATING SIGNAL VOLTAGE; AND OUTPUT MEANS INCLUDING FIRST AND SECOND INPUT TERMINALS AND OUTPUT TERMINAL MEANS FOR TRANSMITTING A MODULATED CARRIER FREQUENCY VOLTAGE; FIRST AND SECOND SIGNAL AMPLIFIER MEANS, EACH INCLUDING INPUT, OUTPUT AND COMMON TERMINALS; MEANS FOR CONNECTING THE INPUT TERMINAL OF SAID FIRST SIGNAL AMPLIFIER MEANS TO THE FIRST OUTPUT TERMINAL OF SAID INPUT MEANS; MEANS FOR CONNECTING THE INPUT TERMINAL OF SAID SECOND SIGNAL AMPLIFIER MEANS TO THE SECOND OUTPUT TERMINAL OF SAID INPUT MEANS; MEANS FOR CONNECTING THE OUTPUT TERMINAL OF SAID FIRST SIGNAL AMPLIFIER MEANS TO THE FIRST INPUT TERMINAL OF SAID OUTPUT MEANS; MEANS FOR CONNECTING THE OUTPUT TERMINAL OF SAID SECOND SIGNAL AMPLIFIER MEANS TO THE SECOND INPUT TERMINAL OF SAID OUTPUT MEANS; JUNCTION MEANS CONNECTED TO THE COMMON TERMINALS OF SAID FIRST AND SECOND SIGNAL AMPLIFIER MEANS, SAID JUNCTION MEANS AND THE THIRD INPUT TERMINAL OF SAID INPUT MEANS BEING ADAPTED TO RECEIVE A CARRIER FREQUENCY VOLTAGE; AND A TWO TERMINAL VARIABLE MAGNITUDE IMPEDANCE MEANS INCLUDING A FIRST TERMINAL CONNECTED TO THE COMMON TERMINAL OF SAID FIRST SIGNAL AMPLIFIER MEANS AND A SECOND TERMINAL CONNECTED TO THE COMMON TERMINAL OF SAID SECOND SIGNAL AMPLIFIER MEANS FOR REGULATING THE OPERATING ATTENUATION OF THE MODULATOR.
Claim 2
Dependent Claim
229 words
A MODULATOR COMPRISING: AN INPUT MEANS INCLUDING FIRST, SECOND AND THRID INPUT TERMINALS, AND FIRST AND SECOND OUTPUT TERMINALS, SAID FIRST AND SECOND INPUT TERMINALS FOR RECEIVING A MODULATING SIGNAL VOLTAGE; AND OUTPUT MEANS INCLUDING FIRST AND SECOND INPUT TERMINALS AND OUTPUT TERMINAL MEANS FOR TRANSMITTING A MODULATED CARRIER FREQUENCY VOLTAGE; FIRST AND SECOND SIGNAL AMPLIFIER MEANS, EACH INCLUDING INPUT, OUTPUT AND COMMON TERMINALS; MEANS FOR CONNECTING THE INPUT TERMINAL OF SAID FIRST SIGNAL AMPLIFIER MEANS TO THE FIRST OUTPUT TERMINAL OF SAID INPUT MEANS; MEANS FOR CONNECTING THE INPUT TERMINAL OF SAID SECOND SIGNAL AMPLIFIER MEANS TO THE SECOND OUTPUT TERMINAL OF SAID INPUT MEANS; MEANS FOR CONNECTING THE OUTPUT TERMINAL OF SAID FIRST SIGNAL AMPLIFIER MEANS TO THE FIRST INPUT TERMINAL OF SAID OUTPUT MEANS; MEANS FOR CONNECTING THE OUTPUT TERMINAL OF SAID SECOND SIGNAL AMPLIFIER MEANS TO THE SECOND INPUT TERMINAL OF SAID OUTPUT MEANS; JUNCTION MEANS CONNECTED TO THE COMMON TERMINALS OF SAID FIRST AND SECOND SIGNAL AMPLIFIER MEANS, SAID JUNCTION MEANS AND THE THIRD INPUT TERMINAL OF SAID INPUT MEANS BEING ADAPTED TO RECEIVE A CARRIER FREQUENCY VOLTAGE; AND A TWO TERMINAL VARIABLE MAGNITUDE IMPEDANCE MEANS INCLUDING A FIRST TERMINAL CONNECTED TO THE COMMON TERMINAL OF SAID FIRST SIGNAL AMPLIFIER MEANS AND A SECOND TERMINAL CONNECTED TO THE COMMON TERMINAL OF SAID SECOND SIGNAL AMPLIFIER MEANS FOR REGULATING THE OPERATING ATTENUATION OF THE MODULATOR.
References Cited (Backward Citations)
US2129313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |