US4453140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator using charge-discharge characteristics of a transistor junction
Assignee: Individual
•
Filing: 1981-11-18
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Granted: 1984-06-05
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Expires: 2001-11-18
Abstract
Abstract A transistor oscillator circuit having a cascaded pair of transistors connected with the collector terminal of one transistor in an inverted electrical polarity so that the oscillatory period is determined by the time required for discharging a charge stored across one junction of one transistor.
Inventors
- 👤 Wayne L. Gindrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:22
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/282; H03K3/2826; H03K3/2828
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
170 words
A transistor oscillator circuit comprising (a) a voltage source having first and grounded terminals; (b) a load having one terminal grounded; (c) a first transistor of a first semiconductor type having a collector, emitter and base, said collector electrode being connected to the ungrounded load terminal, said emitter electrode being connected to the first terminal of said voltage source; (d) a second transistor of the opposite semiconductor type having a collector, emitter and base, said collector electrode being grounded, and said emitter electrode being connected to the base electrode of said first transistor; (e) a resistor having one terminal connected to the first terminal of said voltage source and a second terminal connected to the base electrode of said second transistor; and (f) a capacitor having one terminal connected to the collector electrode of said first transistor and a second terminal connected to the base electrode of said second transistor, whereby the duty cycle of the load depends at least in part upon the charge-discharge characteristics of a transistor junction.
Claim 2
Dependent Claim
170 words
A transistor oscillator circuit comprising (a) a voltage source having first and grounded terminals; (b) a load having one terminal grounded; (c) a first transistor of a first semiconductor type having a collector, emitter and base, said collector electrode being connected to the ungrounded load terminal, said emitter electrode being connected to the first terminal of said voltage source; (d) a second transistor of the opposite semiconductor type having a collector, emitter and base, said collector electrode being grounded, and said emitter electrode being connected to the base electrode of said first transistor; (e) a resistor having one terminal connected to the first terminal of said voltage source and a second terminal connected to the base electrode of said second transistor; and (f) a capacitor having one terminal connected to the collector electrode of said first transistor and a second terminal connected to the base electrode of said second transistor, whereby the duty cycle of the load depends at least in part upon the charge-discharge characteristics of a transistor junction.
Claim 3
Dependent Claim
24 words
The transistor oscillator circuit according to claim 1 wherein said first transistor comprises a PNP type and said second transistor comprises an NPN type.
Claim 4
Dependent Claim
24 words
A transistor oscillator circuit according to claim 1 wherein said first transistor comprises an NPN type and said second transistor comprises a PNP type.
Claim 5
Dependent Claim
14 words
A transistor oscillator circuit according to claim 1, wherein said load comprises a lamp.
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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |