US3174102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal muting circuit for data transmission systems
Assignee: International Business Machines Corp
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Filing: 1962-05-31
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Granted: 1965-03-16
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Expires: 1982-05-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Leo C Berzinski
- 👤 Ronald J Bymers
- 👤 Carl E Ruoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:23
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN AN ELECTRICAL CIRCUIT HAVING A SOURCE OF SIGNALS, A SOURCE OF REFERENCE POTENTIAL, AND AN IMPEDANCE CONNECTED BETWEEN SAID SOURCES, A MUTING CIRCUIT FOR PREVENTING THE APPLICATION OF SIGNALS TO THE IMPEDANCE COMPRISING A PAIR OF COMPLEMENTARY TRANSISTORS EACH HAVING BASE, EMITTER AND COLLECTOR TERMINALS, THE COLLECTOR TERMINALS BEING CONNECTED TO EACH OTHER AND THE EMITTER TERMINALS BEING CONNECTED TO THE SOURCE OF REFERENCE POTENTIAL, MEANS ADAPTED FOR CONNECTION WITH A SOURCE OF BIAS POTENTIAL FOR OPERATING THE TRANSISTORS SIMULTANEOUSLY IN SATURATION, AND A LOW IMPEDANCE CAPACITOR CONNECTING THE JUNCTION BETWEEN THE SOURCE OF SIGNALS AND THE IMPEDANCE TO THE COLLECTOR TERMINALS FOR SHUNTING SIGNALS APPEARING IN THE AMPLIFIER OUTPUT CIRCUIT THROUGH THE TRANSISTORS.
Claim 2
Dependent Claim
115 words
IN AN ELECTRICAL CIRCUIT HAVING A SOURCE OF SIGNALS, A SOURCE OF REFERENCE POTENTIAL, AND AN IMPEDANCE CONNECTED BETWEEN SAID SOURCES, A MUTING CIRCUIT FOR PREVENTING THE APPLICATION OF SIGNALS TO THE IMPEDANCE COMPRISING A PAIR OF COMPLEMENTARY TRANSISTORS EACH HAVING BASE, EMITTER AND COLLECTOR TERMINALS, THE COLLECTOR TERMINALS BEING CONNECTED TO EACH OTHER AND THE EMITTER TERMINALS BEING CONNECTED TO THE SOURCE OF REFERENCE POTENTIAL, MEANS ADAPTED FOR CONNECTION WITH A SOURCE OF BIAS POTENTIAL FOR OPERATING THE TRANSISTORS SIMULTANEOUSLY IN SATURATION, AND A LOW IMPEDANCE CAPACITOR CONNECTING THE JUNCTION BETWEEN THE SOURCE OF SIGNALS AND THE IMPEDANCE TO THE COLLECTOR TERMINALS FOR SHUNTING SIGNALS APPEARING IN THE AMPLIFIER OUTPUT CIRCUIT THROUGH THE TRANSISTORS.
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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |