US4066982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator circuit comprising integrated MIS field-effect transistors
Assignee: ITT Inc
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Filing: 1977-03-11
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Granted: 1978-01-03
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Expires: 1997-03-11
Abstract
Abstract The temperature dependence of the oscillator frequency of an integrated RC oscillator comprising an RS flip-flop with two load MISFETs, is compensated by means of an additional MISFET, the drain of which is connected to the gate electrodes of said load MISFETs and the gate electrode of said additional MISFET is connected to the supply voltage.
Inventors
- 👤 Klaus D. Strohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:07
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/01; H03K3/011; H03K3/027; H03K3/03; H03K3/353; H03K3/354
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
An oscillator circuit including temperature compensating means and means for coupling said oscillator circuit to an external power source having an internal resistance, comprising: an RS flip-flop having first and second inputs; first and second capacitors for coupling said first and second inputs respectively to ground; first and second inverters, each containing a load transistor, said first and second inputs each controlled by one of said load transistors; and a first transistor for providing temperature compensation of the oscillator frequency, said first transistor having a source electrode coupled to ground, a gate electrode coupled to a first source of supply voltage and a drain electrode coupled to the gate electrodes of said load transistors and to said external power source, said first transistor having a drain-source resistance in the order of the internal resistance of said external power source.
Claim 2
Dependent Claim
139 words
An oscillator circuit including temperature compensating means and means for coupling said oscillator circuit to an external power source having an internal resistance, comprising: an RS flip-flop having first and second inputs; first and second capacitors for coupling said first and second inputs respectively to ground; first and second inverters, each containing a load transistor, said first and second inputs each controlled by one of said load transistors; and a first transistor for providing temperature compensation of the oscillator frequency, said first transistor having a source electrode coupled to ground, a gate electrode coupled to a first source of supply voltage and a drain electrode coupled to the gate electrodes of said load transistors and to said external power source, said first transistor having a drain-source resistance in the order of the internal resistance of said external power source.
Claim 3
Dependent Claim
25 words
An oscillator circuit according to claim 1 wherein said external power source includes an ohmic voltage divider coupled between said first supply voltage and ground.
References Cited (Backward Citations)
US3975649A
Cited
US4015219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |