Patent US2948058A successfully refreshed from Google Patents.
Patent US3329904A successfully refreshed from Google Patents.
US3329904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide-band transistor amplifier system employing impedance mismatch and high frequency peaking
Assignee: Blonder Tongue Electronics
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Filing: 1965-11-22
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Granted: 1967-07-04
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Expires: 1985-11-22
Abstract
No abstract record available.
Inventors
- 👤 Horowitz Irving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:05
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/189; H03F3/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A WIDE-BAND AMPLIFIER SYSTEM COMPRISING, IN COMBINATION, A SOURCE OF WIDE-BAND VIDEO-FREQUENCY SIGNALS, SAID SOURCE HAVING A PAIR OF OUTPUT TERMINALS WITH AN OUTPUT IMPEDANCE BETWEEN SAID TERMINALS OF SUBSTANTIALLY HUNDREDS OF MEGOHMS AND INCLUDING A SHUNT CAPACITANCE, A TRANSISTOR VIDEO AMPLIFIER HAVING AN INPUT WITH BASE AND EMITTER INPUT TERMINALS AND HAVING AN OUTPUT, FEEDBACK CIRCUIT MEANS CONNECTING THE OUTPUT OF SAID AMPLIFIER TO ITS INPUT FOR PROVIDING AN EFFECTIVE AMPLIFIER INPUT IMPEDANCE OF ONLY SUBSTANTIALLY HUNDREDS OF OHMS, WHEREBY SAID INPUT IMPEDANCE OF SAID AMPLIFIER IS MIS-MATCHED TO THE OUTPUT IMPEDANCE OF SAID SOURCE, MEANS INCLUDING A SERIES INDUCTANCE AND CAPACITANCE CONNECTING ONE OF SAID OUTPUT TERMINALS OF THE SOURCE TO SAID BASE INPUT TERMINAL OF THE AMPLIFIER, SAID INDUCTANCE BEING ADJUSTED TO RESONATE SUBSTANTIALLY ONLY WITH SAID SHUNT CAPACITANCE AT A FREQUENCY AT THE HIGH END OF SAID WIDE BAND, AND MEANS CONNECTING THE OTHER OUTPUT TERMINAL OF THE SOURCE TO THE EMITTER INPUT TERMINAL OF THE AMPLIFIER.
Claim 2
Dependent Claim
161 words
A WIDE-BAND AMPLIFIER SYSTEM COMPRISING, IN COMBINATION, A SOURCE OF WIDE-BAND VIDEO-FREQUENCY SIGNALS, SAID SOURCE HAVING A PAIR OF OUTPUT TERMINALS WITH AN OUTPUT IMPEDANCE BETWEEN SAID TERMINALS OF SUBSTANTIALLY HUNDREDS OF MEGOHMS AND INCLUDING A SHUNT CAPACITANCE, A TRANSISTOR VIDEO AMPLIFIER HAVING AN INPUT WITH BASE AND EMITTER INPUT TERMINALS AND HAVING AN OUTPUT, FEEDBACK CIRCUIT MEANS CONNECTING THE OUTPUT OF SAID AMPLIFIER TO ITS INPUT FOR PROVIDING AN EFFECTIVE AMPLIFIER INPUT IMPEDANCE OF ONLY SUBSTANTIALLY HUNDREDS OF OHMS, WHEREBY SAID INPUT IMPEDANCE OF SAID AMPLIFIER IS MIS-MATCHED TO THE OUTPUT IMPEDANCE OF SAID SOURCE, MEANS INCLUDING A SERIES INDUCTANCE AND CAPACITANCE CONNECTING ONE OF SAID OUTPUT TERMINALS OF THE SOURCE TO SAID BASE INPUT TERMINAL OF THE AMPLIFIER, SAID INDUCTANCE BEING ADJUSTED TO RESONATE SUBSTANTIALLY ONLY WITH SAID SHUNT CAPACITANCE AT A FREQUENCY AT THE HIGH END OF SAID WIDE BAND, AND MEANS CONNECTING THE OTHER OUTPUT TERMINAL OF THE SOURCE TO THE EMITTER INPUT TERMINAL OF THE AMPLIFIER.
References Cited (Backward Citations)
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |