US3308386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sample and hold circuit with reduced drift by minimizing diode leakage current
Assignee: Beckman Coulter Inc
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Filing: 1963-04-12
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Granted: 1967-03-07
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Expires: 1983-04-12
Abstract
No abstract record available.
Inventors
- 👤 Wong Wai-Kee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:54
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/04; H; H03; H03K; H03K17/00; H03K17/51; H03K17/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A SWITCHING DEVICE FOR A SAMPLE AND HOLD SYSTEM COMPRISING: A DIODE BRIDGE HAVING A PAIR OF INPUT ARMS CONNECTED TO FORM AN INPUT JUNCTION AND A PAIR OF OUTPUT ARMS CONNECTED TO FORM AN OUTPUT JUNCTION, EACH OF SAID PAIR OF OUTPUT ARMS RESPECTIVELY INCLUDING A PAIR OF DIODES; A POINT OF SUBSTANTIALLY CONSTANT REFERENCE POTENTIAL; AND IMPEDANCE MEANS CONNECTING THE RESPECTIVE JUNCTIONS OF THE PAIR OF DIODES IN EACH OF SAID PAIR OF OUTPUT ARMS TO SAID POINT OF REFERENCE POTENTIAL.
Claim 2
Dependent Claim
83 words
A SWITCHING DEVICE FOR A SAMPLE AND HOLD SYSTEM COMPRISING: A DIODE BRIDGE HAVING A PAIR OF INPUT ARMS CONNECTED TO FORM AN INPUT JUNCTION AND A PAIR OF OUTPUT ARMS CONNECTED TO FORM AN OUTPUT JUNCTION, EACH OF SAID PAIR OF OUTPUT ARMS RESPECTIVELY INCLUDING A PAIR OF DIODES; A POINT OF SUBSTANTIALLY CONSTANT REFERENCE POTENTIAL; AND IMPEDANCE MEANS CONNECTING THE RESPECTIVE JUNCTIONS OF THE PAIR OF DIODES IN EACH OF SAID PAIR OF OUTPUT ARMS TO SAID POINT OF REFERENCE POTENTIAL.
References Cited (Backward Citations)
US3075096A
Cited
US3052851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |