US3229212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct sampling apparatus
Assignee: Tektronix Inc
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Filing: 1963-02-18
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Granted: 1966-01-11
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Expires: 1983-02-18
Abstract
No abstract record available.
Inventors
- 👤 John V Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:44
CPC Classifications
G; G11; G11C; G11C27/00; G11C27/02; G11C27/024; G11C27/026; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/34; G01R13/342; H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/74
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
272 words
A SIGNAL SAMPLING CIRCUIT, COMPRISING: SAMPLING GATE MEANS FOR TRANSMITTING A PORTION OF AN INPUT SIGNAL APPLIED TO THE INPUT TERMINAL OF SAID SAMPLING GATE MEANS, THROUGH SAID SAMPLING GATE MEANS TO THE OUTPUT TERMINAL THEREOF AS A SAMPLE PULSE, WHEN AN INTERROGATING PULSE IS APPLIED TO SAID SAMPLING GATE MEANS; A TRANSMISSION LINE CONNECTED AT ITS INPUT TO THE OUTPUT TERMINAL OF SAID SAMPLING GATE MEANS; DIFFERENTIAL AMPLIFIER MEANS INCLUDING AN OPERATIONAL AMPLIFIER HAVING A NEGATIVE FEEDBACK IMPEDANCE FORMED BY THE PARALLEL COMBINATION OF A RESISTOR AND A CAPACITOR CONNECTED FROM THE OUTPUT TO THE INPUT OF SAID OPERATIONAL AMPLIFIER, WITH THE ONE INPUT OF DIFFERENTIAL AMPLIFIER CORRESPONDING TO THE INPUT OF SAID OPERATIONAL AMPLIFIER CONNECTED TO THE OUTPUT OF SAID TRANSMISSION LINE SO THAT SAID SAMPLE PULSE IS TRANSMITTED THROUGH SAID TRANSMISSION LINE TO SAID OPERATIONAL AMPLIFIER TO PRODUCE AN AMPLIFIER SAMPLE SIGNAL VOLTAGE ON THE OUTPUT OF SAID DIFFERENTIAL AMPLIFIER WITHOUT SUBSTANTIALLY CHANGING THE INPUT VOLTAGE OF SAID OPERATIONAL AMPLIFIER; MEMORY MEANS CONNECTED AT ITS INPUT TO THE OUTPUT OF SAID DIFFERENTIAL AMPLIFIER FOR ADDIING THE AMPLIFIED SAMPLE SIGNAL TO THE PREVIOUS OUTPUT VOLTAGE OF SAID MEMORY MEANS TO PRODUCE AN OUTPUT SIGNAL WHICH IS A REPRODUCTION OF SAID INPUT SIGNAL AT A LOWER FREQUENCY; AND FEEDBACK MEANS FOR TRANSMITTING A PORTION OF SAID OUTPUT SIGNAL TO THE OTHER INPUT TERMINAL OF SAID DIFFERENTIAL AMPLIFIER TO PRODUCE A DIFFERENCE SIGNAL WHICH IS TRANSMITTED FROM THE OUTPUT OF SAID DIFFERENTIAL AMPLIFIER THROUGH SAID ONE INPUT TERMINAL OF SAID DIFFERENTIAL AMPLIFIER TO CHANGE THE REFERENCE VOLTAGE ON THE OUTPUT OF SAID SAMPLING GATE MEANS IN ACCORDANCE WITH THE SAMPLE PULSE VOLTAGE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |