Patent US4158149A successfully refreshed from Google Patents.
US4158149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic switching circuit using junction type field-effect transistor
Assignee: Kokusai Denki Electric Inc
•
Filing: 1977-11-08
•
Granted: 1979-06-12
•
Expires: 1997-11-08
Abstract
Abstract In an electronic switching circuit using a junction type field-effect transistor, a capacitor is connected between the gate electrode of the transistor and a control pulse source. The capacitor is cooperative with a rectifying action of the gate electrode of the transistor to supply to the gate of the transistor a switching voltage which is different from the potential level of the control pulse from the control pulse source and is DC-restored following an input signal applied to the transistor.
Inventors
- 👤 Kiyoshi Otofuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:02
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/687
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
An electronic switching circuit comprising: a junction type field-effect transistor as a switching element having a first electrode for receiving an input signal, a second electrode for delivering an output signal and a gate electrode; and a capacitor connected to form the only connection path between the gate electrode of said transistor and a control pulse source which generates control pulses, said capacitor being cooperative with a rectifying action of the gate electrode of said transistor to supply to the gate electrode of said transistor a switching voltage which is different from the potential level of said control pulse and is DC-restored following said input signal.
Claim 2
Dependent Claim
106 words
An electronic switching circuit comprising: a junction type field-effect transistor as a switching element having a first electrode for receiving an input signal, a second electrode for delivering an output signal and a gate electrode; and a capacitor connected to form the only connection path between the gate electrode of said transistor and a control pulse source which generates control pulses, said capacitor being cooperative with a rectifying action of the gate electrode of said transistor to supply to the gate electrode of said transistor a switching voltage which is different from the potential level of said control pulse and is DC-restored following said input signal.
Claim 3
Dependent Claim
24 words
An electronic switching circuit according to claim 1, wherein the amplitude of said control pulse is greater than the pinch-off voltage of said transistor.
Claim 4
Dependent Claim
22 words
An electronic switching circuit according to claim 1, wherein said control pulses are a train of regular pulses having a constant period.
Claim 5
Dependent Claim
39 words
An electronic switching circuit according to claim 1, further comprising a resistor having one end connected with the gate electrode of said transistor and the other end connected with a source of a voltage higher than said input signal.
Claim 6
Dependent Claim
46 words
An electronic switching circuit according to claim 1, wherein said capacitor stores a charge during the period when a control pulse is generated and said stored charge prevents the junction type field-effect transistor from being gated on during periods when a control pulse is not generated.
References Cited (Backward Citations)
US3325654A
Cited
US3414737A
Cited
US3412266A
Cited
US3448293A
Cited
US3509374A
Cited
DE1961255A1
Cited
US3731116A
Cited
US3908136A
Cited
US4009401A
Cited
US3902078A
Cited
US3955103A
Cited
US4052623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-11 | 1982-12-11 | 1983-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-11 | 1986-12-11 | 1987-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-11 | 1990-12-11 | 1991-06-12 | $7700.00 | Window Closed / Lapsed |