US3663835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field effect transistor circuit
Assignee: International Business Machines Corp
•
Filing: 1970-01-28
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Granted: 1972-05-16
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Expires: 1990-01-28
Abstract
Abstract A circuit has a field effect transistor (FET) with source, drain and gate electrodes, and a capacitor connecting the source and gate electrode. Means is provided for applying a sufficient pulse to the source electrode and through the capacitor to the gate electrode to give an output signal at the drain electrode independent of any signal information which may be stored on the gate electrode.
Inventors
- 👤 William K Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:33
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/08; H03K19/094; H03K19/096; G; G11; G11C; G11C19/00; G11C19/18; H10; H10D; H10D84/00; H10D84/80; H10D84/811; H10D84/813; H10D84/82; H10D84/83; H10D84/83125; H10D99/00; H10P; H10P95/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
A circuit comprising a field effect transistor with a given threshold voltage and having two current flow electrodes and a gate electrode, a capacitor connecting one of the current flow electrodes and the gate electrode, and a means for applying a sufficient pulse to the current flow electrode to which said capacitor is connected and to the gate electrode through said capacitor to exceed the threshold voltage of the transistor and give an output pulse at the other current flow electrode, independent of a signal at the gate electrode.
Claim 2
Dependent Claim
89 words
A circuit comprising a field effect transistor with a given threshold voltage and having two current flow electrodes and a gate electrode, a capacitor connecting one of the current flow electrodes and the gate electrode, and a means for applying a sufficient pulse to the current flow electrode to which said capacitor is connected and to the gate electrode through said capacitor to exceed the threshold voltage of the transistor and give an output pulse at the other current flow electrode, independent of a signal at the gate electrode.
Claim 3
Dependent Claim
20 words
The circuit of claim 1 additionally comprising a signal source coupled to the gate electrode of said field effect transistor.
Claim 4
Dependent Claim
18 words
The circuit of claim 1 in which said field effect transistor is an insulated gate field effect transistor.
Claim 5
Dependent Claim
46 words
The circuit of claim 3 in which an electrode of said capacitor is formed by gate metallization of said field effect transistor, and another electrode of said capacitor is formed by a diffusion forming said one of the current flow electrodes of said field effect transistor.
Claim 6
Dependent Claim
23 words
The circuit of claim 4 additionally comprising a source of an input signal coupled to the gate electrode of said field effect transistor.
Claim 7
Dependent Claim
25 words
The circuit of claim 5 additionally comprising a second capacitor adapted to be connected to said other current flow electrode of said field effect transistor.
Claim 8
Dependent Claim
40 words
The circuit of claim 6 in which one electrode of of said second capacitor comprises said other current flow electrode of said field effect transistor, and a second electrode comprises a metallization layer insulated from said other current flow electrode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |