US3307044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for suppressing the appearance of transient responses or spikes
Assignee: Nihon Genshiryoku Kenkyusho
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Filing: 1964-01-20
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Granted: 1967-02-28
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Furukawa Tomozo
- 👤 Wakayama Naoaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:59
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A SEMICONDUCTOR CHOPPER CIRCUIT COMPRISING: (A) A TRANSISTOR HAVING A BASE, EMITTER AND COLLECTOR; (B) FIRST CIRCUIT MEANS CONNECTED TO THE EMITTER OF SAID TRANSISTOR FOR APPLYING THERETO A SIGNAL TO BE CHOPPED; (C) SECOND CIRCUIT MEANS CONNECTED TO THE BASE OF SAID TRANSISTOR FOR APPLYING A GATING SIGNAL THERETO; (D) A COMPENSATING CIRCUIT MEANS HAVING A RESISTANCECAPACITANCE IMPEDANCE CHARACTERISTIC COMPARABLE TO THAT OF THE BASE-EMITTER CIRCUIT OF SAID TRANSISTOR AND HAVING AN OUTPUT TERMINAL CONNECTED TO THE EMITTER OF SAID TRANSISTOR AND AN INPUT TERMINAL FOR RECEIVING AN INPUT SIGNAL; (E) A FIRST GATING SIGNAL SOURCE CONNECTED TO SAID SECOND CIRCUIT MEANS; AND (F) A SECOND GATING SIGNAL SOURCE CONNECTED TO THE SAID COMPENSATING MEANS INPUT CIRCUIT, SAID SECOND GATING SIGNAL SOURCE HAVING A SIGNAL OUTPUT SIMILAR TO THE OUTPUT OF SAID FIRST GATING SIGNAL SOURCE BUT OPPOSITE IN PHASE.
Claim 2
Dependent Claim
141 words
A SEMICONDUCTOR CHOPPER CIRCUIT COMPRISING: (A) A TRANSISTOR HAVING A BASE, EMITTER AND COLLECTOR; (B) FIRST CIRCUIT MEANS CONNECTED TO THE EMITTER OF SAID TRANSISTOR FOR APPLYING THERETO A SIGNAL TO BE CHOPPED; (C) SECOND CIRCUIT MEANS CONNECTED TO THE BASE OF SAID TRANSISTOR FOR APPLYING A GATING SIGNAL THERETO; (D) A COMPENSATING CIRCUIT MEANS HAVING A RESISTANCECAPACITANCE IMPEDANCE CHARACTERISTIC COMPARABLE TO THAT OF THE BASE-EMITTER CIRCUIT OF SAID TRANSISTOR AND HAVING AN OUTPUT TERMINAL CONNECTED TO THE EMITTER OF SAID TRANSISTOR AND AN INPUT TERMINAL FOR RECEIVING AN INPUT SIGNAL; (E) A FIRST GATING SIGNAL SOURCE CONNECTED TO SAID SECOND CIRCUIT MEANS; AND (F) A SECOND GATING SIGNAL SOURCE CONNECTED TO THE SAID COMPENSATING MEANS INPUT CIRCUIT, SAID SECOND GATING SIGNAL SOURCE HAVING A SIGNAL OUTPUT SIMILAR TO THE OUTPUT OF SAID FIRST GATING SIGNAL SOURCE BUT OPPOSITE IN PHASE.
References Cited (Backward Citations)
US2838618A
Cited
US3042877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |