Patent US3665342A successfully refreshed from Google Patents.
US3665342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonant circuit transistor oscillator system
Assignee: Motorola Solutions Inc
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Filing: 1970-11-04
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Granted: 1972-05-23
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Expires: 1990-11-04
Abstract
Abstract An oscillator including a bias source which may be applied to a chip by integrated circuit techniques is disclosed. The oscillator has a tank circuit for determining frequency and has an automatic gain control for keeping the amplitude of the oscillator output constant. The oscillator includes an output circuit which makes it possible to use the oscillator as a source of input waves for an emitter coupled logic circuit.
Inventors
- 👤 L J Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:47
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03L; H03L5/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
348 words
An oscillator system having a bias portion for supplying a bias voltage, an oscillator portion and an automatic gain control system for the oscillator portion, the oscillator portion and the automatic gain control system comprising: a first and a second transistor, each having a first and a second main electrode, and each having a control electrode, the first main electrodes being electrically connected together; means for connecting the electrical connection between the first main electrodes between the first and second transistors to one side of a source of electrical power; means for connecting the second main electrode of the first transistor directly to the control electrode of the second transistor; means for connecting the second main electrode of the second transistor to the other side of the source of electrical power; means for connecting a frequency determining means directly between the second main electrode of the first transistor and the control electrode of the first transistor; means for applying the bias voltage directly to the control electrode of the first transistor and indirectly through the frequency determining means to the second main electrode of the first transistor and the control electrode of the second transistor; a third and fourth transistor, each having a first and second main electrode, and each having a control electrode; means for connecting the control electrode of the second transistor to the control electrode of the third transistor; means for connecting the first main electrode of the third transistor to the one side of the source of electrical power and the second main electrode to the other side of the source of electrical power; means for coupling the first main electrode of the third transistor to the control electrode of the fourth transistor; and the means for connecting the electrical connection of the first main electrodes of the first and second transistors to one side of a source of electrical power, further comprising the first main electrode of the fourth transistor being connected to the one side of the source of electrical power and the second main electrode being connected to the electrical connection.
Claim 2
Dependent Claim
348 words
An oscillator system having a bias portion for supplying a bias voltage, an oscillator portion and an automatic gain control system for the oscillator portion, the oscillator portion and the automatic gain control system comprising: a first and a second transistor, each having a first and a second main electrode, and each having a control electrode, the first main electrodes being electrically connected together; means for connecting the electrical connection between the first main electrodes between the first and second transistors to one side of a source of electrical power; means for connecting the second main electrode of the first transistor directly to the control electrode of the second transistor; means for connecting the second main electrode of the second transistor to the other side of the source of electrical power; means for connecting a frequency determining means directly between the second main electrode of the first transistor and the control electrode of the first transistor; means for applying the bias voltage directly to the control electrode of the first transistor and indirectly through the frequency determining means to the second main electrode of the first transistor and the control electrode of the second transistor; a third and fourth transistor, each having a first and second main electrode, and each having a control electrode; means for connecting the control electrode of the second transistor to the control electrode of the third transistor; means for connecting the first main electrode of the third transistor to the one side of the source of electrical power and the second main electrode to the other side of the source of electrical power; means for coupling the first main electrode of the third transistor to the control electrode of the fourth transistor; and the means for connecting the electrical connection of the first main electrodes of the first and second transistors to one side of a source of electrical power, further comprising the first main electrode of the fourth transistor being connected to the one side of the source of electrical power and the second main electrode being connected to the electrical connection.
Claim 3
Dependent Claim
24 words
The invention of claim 1 in which means are provided to keep the second main electrode of said third transistor at a constant voltage.
Claim 4
Dependent Claim
50 words
The invention of claim 1 in which said means for coupling the first electrode of said third transistor to the control electrode of said fourth transistor includes a fifth transistor and a diode connected between a main electrode of said fifth transistor and the control electrode of said fourth transistor.
Claim 5
Dependent Claim
149 words
The invention of claim 1 in which a voltage limiting means is provided for said oscillation portion, said voltage limiting means including a sixth aNd a seventh transistor each having a first and second main electrode and a control electrode and a common-emitter resistor, the first electrode of each of said sixth and seventh transistors being connected by way of the common-emitter resistor to the one side of the source of electrical power, means for applying a fixed bias from said bias portion to the control electrode of said seventh transistor, means for connecting the second main electrode of the sixth transistor to the other side of the source of electrical power, means for applying oscillator output from the control electrode of said second transistor to the control electrode of the said sixth transistor and means to take limited output voltage from the second electrode of said seventh transistor.
Claim 6
Dependent Claim
62 words
The invention of claim 4 in which said means for applying an oscillator output from the control electrode of said second transistor to the control electrode of said sixth transistor comprises the path through the main electrodes of one transistor, the control electrode thereof being supplied with a constant voltage, and through a main electrode and the control electrode of another transistor.
Claim 7
Dependent Claim
136 words
The invention of claim 1 in which said bias portion comprises an eighth and ninth transistor each having first and second main electrodes and a control electrode, and a diode, means to connect the first main electrode of said ninth transistor to the one side of the source of electrical power by way of the forward conductor direction of said diode, means to connect the second main electrode of the ninth transistor to the other side of the source of electrical power, means to connect the second main electrode of the eighth transistor to the other side of the source of electrical power, and means to connect said control electrodes of said eighth and ninth transistors together, said control electrode of said first transistor being connected to said control electrode of said eighth and ninth transistors.
Claim 8
Dependent Claim
46 words
The invention of claim 6 in which the means for connecting the second main electrode of the eighth transistor further comprise: a plurality of resistors connected in series and means are provided for providing bias potential comprising connections to the junctions of said series connected resistors.
Claim 9
Dependent Claim
73 words
The invention of claim 7 in which said means for providing bias includes a further transistor, having first and second main electrodes and a control electrode, the control electrode of the further transistor being connected to a junction of the series connected resistors and the bias being taken from the first main electrode of said further transistor, the second main electrode being connected to the other side of the source of electrical power.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |