US3249693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement including a directcurrent coupled transistor amplifier for television signals
Assignee: US Philips Corp
•
Filing: 1962-08-07
•
Granted: 1966-05-03
•
Expires: 1982-08-07
Abstract
No abstract record available.
Inventors
- 👤 Suhrmann Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:38
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/44; H04N5/57; H04N5/14; H04N5/148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
TELEVISION CIRCUIT COMPRISING AN AMPLIFYING DEVICE HAVING INPUT, COMMON AND OUTPUT ELECTRODES, A SOURCE OF VIDEO SIGNALS, MEANS APPLYING SAID VIDEO SIGNALS BETWEEN SAID INPUT AND COMMON ELECTRODES, A SOURCE OF OPERATING POTENTIAL HAVING FIRST AND SECOND TERMINALS, MEANS CONNECTING SAID COMMON ELECTRODE TO SAID FIRST TERMINAL, VOLTAGE STABILIZING MEANS AND LOAD RESISTOR MEANS CONNECTED IN THAT ORDER BETWEEN SAID SECOND TERMINAL AND SAID OUTPUT ELECTRODE, SAID STABILIZING MEANS HAVING A VOLTAGE DROP SUBSTANTIALLY INDEPENDENT OF CURRENT FLOW THERETHROUGH, AN IMAGE DISPLAY TUBE HAVING A CATHODE AND A CONTROL GRID, MEANS CONNECTING SAID OUTPUT ELECTRODE TO SAID CATHODE TO APPLY VIDEO SIGNALS THERETO, VOLTAGE DIVIDER MEANS CONNECTED BETWEEN SAID FIRST AND SECOND TERMINALS, AND MEANS CONNECTING SAID CONTROL GRID TO SAID VOLTAGE DIVIDER MEANS, WHEREBY THE VOLTAGE AT SAID CONTROL GRID CONNOT BECOME POSITIVE WITH RESPECT TO THE VOLTAGE AT SAID CATHODE.
Claim 2
Dependent Claim
142 words
TELEVISION CIRCUIT COMPRISING AN AMPLIFYING DEVICE HAVING INPUT, COMMON AND OUTPUT ELECTRODES, A SOURCE OF VIDEO SIGNALS, MEANS APPLYING SAID VIDEO SIGNALS BETWEEN SAID INPUT AND COMMON ELECTRODES, A SOURCE OF OPERATING POTENTIAL HAVING FIRST AND SECOND TERMINALS, MEANS CONNECTING SAID COMMON ELECTRODE TO SAID FIRST TERMINAL, VOLTAGE STABILIZING MEANS AND LOAD RESISTOR MEANS CONNECTED IN THAT ORDER BETWEEN SAID SECOND TERMINAL AND SAID OUTPUT ELECTRODE, SAID STABILIZING MEANS HAVING A VOLTAGE DROP SUBSTANTIALLY INDEPENDENT OF CURRENT FLOW THERETHROUGH, AN IMAGE DISPLAY TUBE HAVING A CATHODE AND A CONTROL GRID, MEANS CONNECTING SAID OUTPUT ELECTRODE TO SAID CATHODE TO APPLY VIDEO SIGNALS THERETO, VOLTAGE DIVIDER MEANS CONNECTED BETWEEN SAID FIRST AND SECOND TERMINALS, AND MEANS CONNECTING SAID CONTROL GRID TO SAID VOLTAGE DIVIDER MEANS, WHEREBY THE VOLTAGE AT SAID CONTROL GRID CONNOT BECOME POSITIVE WITH RESPECT TO THE VOLTAGE AT SAID CATHODE.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |