US3912945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching circuit
Assignee: Sony Corp
•
Filing: 1974-09-03
•
Granted: 1975-10-14
•
Expires: 1994-09-03
Abstract
Abstract A switching circuit having a biasing element connected between a driving signal supplying terminal and the control electrode of a switching element, a transistor whose base and emitter electrodes are connected across the biasing element and a capacitor connected between the collector electrode of the transistor and a reference voltage.
Inventors
- 👤 Yutaka Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:07
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/722; H03K17/723; H03K4/00; H03K4/06; H03K4/08; H03K4/83
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
77 words
A switching circuit comprising; a. means for producing a driving signal; b. a switching element having at least a control electrode; c. a biasing element connected between said driving signal producing means and the control electrode of said switching element; d. a transistor having base, emitter and collector electrodes, the base-emitter path of said transistor being connected across said biasing element; and e. a capacitor connected between the collector electrode of said transistor and a reference voltage.
Claim 2
Dependent Claim
77 words
A switching circuit comprising; a. means for producing a driving signal; b. a switching element having at least a control electrode; c. a biasing element connected between said driving signal producing means and the control electrode of said switching element; d. a transistor having base, emitter and collector electrodes, the base-emitter path of said transistor being connected across said biasing element; and e. a capacitor connected between the collector electrode of said transistor and a reference voltage.
Claim 3
Dependent Claim
19 words
A switching circuit as claimed in claim 1, in which said switching element is a gate controlled switch device.
Claim 4
Dependent Claim
16 words
A switching circuit as claimed in claim 2, in which said biasing element is a resistor.
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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |