US3696311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long-cycle transistor astable multivibrator
Assignee: Hitachi Ltd
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Filing: 1970-03-10
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Granted: 1972-10-03
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Expires: 1990-03-10
Abstract
Abstract A long cycle oscillator comprising a first and a second transistor, and a charge-discharge circuit including a capacitor and a resistor which are connected in parallel to each other, in which the said components are so constructed that a base current of the first transistor is controlled by a collector voltage of the second transistor, an applied voltage to the second transistor is controlled by the collector voltage of the first transistor, the base current of the second transistor being controlled by the collector voltage of the first transistor and the charge-discharge circuit.
Inventors
- 👤 Takayoshi Oushige
- 👤 Kikuo Iizuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:43
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/35; H03K3/352; H02; H02P; H02P23/00; H02P23/10; H03K3/26; H03K3/28; H03K3/281; H03K3/282; H03K3/2823; H03K3/2825
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
218 words
An oscillator comprising a first and a second switching component, respectively, each having an amplification function, first and second main current electrodes, and being capable of controlling its main current in response to an applied controlling current at a control input thereof, a load and a supply voltage source connected in series between said first and second electrodes of said first switching component, and a charge-discharge circuit connected between said first electrode of said first switching component and the control input of said second switching component and having a predetermined time constant through which said controlling current of said second switching component is changed by said main current of said first switching component, whereby a voltage to be applied to said second switching component is controlled by said main current of said first switching component, and means connecting the first electrode of said second switching component to the junction of said load and said first electrode of said first switching component, said control input of said first switching component being connected to said first electrode of said second switching component whereby said controlling current of said first switching component is controlled directly by said main currents of said first and second switching components and the second electrodes of said first and second switching components being directly connected together.
Claim 2
Dependent Claim
218 words
An oscillator comprising a first and a second switching component, respectively, each having an amplification function, first and second main current electrodes, and being capable of controlling its main current in response to an applied controlling current at a control input thereof, a load and a supply voltage source connected in series between said first and second electrodes of said first switching component, and a charge-discharge circuit connected between said first electrode of said first switching component and the control input of said second switching component and having a predetermined time constant through which said controlling current of said second switching component is changed by said main current of said first switching component, whereby a voltage to be applied to said second switching component is controlled by said main current of said first switching component, and means connecting the first electrode of said second switching component to the junction of said load and said first electrode of said first switching component, said control input of said first switching component being connected to said first electrode of said second switching component whereby said controlling current of said first switching component is controlled directly by said main currents of said first and second switching components and the second electrodes of said first and second switching components being directly connected together.
Claim 3
Dependent Claim
105 words
An oscillator according to claim 1, in which said first and second switching components are a first and a second transistor, respectively, whereby the collector current of said second transistor is controlled by the collector voltage of the first transistor, the base of the second transistor being connected through said charge-discharge circuit to the collector of the first transistor, the collector of said second transistor being connected through a variable resistance to the collector of said first transistor, the emitters of said first and second transistors being connected together and the base of the first transistor being connected to the collector of the second transistor.
Claim 4
Dependent Claim
100 words
An oscillator comprising a first transistor having a collector and an emitter; a voltage supply; a first resistor connected between the collector of the first transistor and one side of said voltage supply; a second transistor having a collector connected to the base of the first transistor and an emitter connected to the emitter of the first transistor; a second resistor connected between the collectors of the first and second transistors; a first capacitor connected between the collector of the first transistor and the base of the second transistor; and a third resistor connected in parallel to said first capacitor.
Claim 5
Dependent Claim
100 words
An oscillator comprising a first transistor having a collector and an emitter; a voltage supply; a first resistor connected between the collector of the first transistor and one side of said voltage supply; a second transistor having a collector connected to the base of the first transistor and an emitter connected to the emitter of the first transistor; a second resistor connected between the collectors of the first and second transistors; a first capacitor connected between the collector of the first transistor and the base of the second transistor; and a third resistor connected in parallel to said first capacitor.
Claim 6
Dependent Claim
62 words
An oscillator according to claim 3, including a second capacitor which is connected between the base and the collector of said second transistor, a fourth resistor connected between the other side of said voltage supply and the base of said first transistor and a fifth resistor connected between the emitter of the first transistor and the other side of said voltage supply.
Claim 7
Dependent Claim
102 words
An oscillator comprising a first transistor having a collector connected through a rectifier circuit and a load to an alternating current supply, an emitter connected to the alternating current supply through said rectifier circuit and said load, and a base; a second transistor having a collector connected to the collector of said first transistor through a first resistor, an emitter connected to said alternating current supply through said rectifier and said load and a base connected to the collector of said first transistor through a charge-discharge circuit; the base of said first transistor being connected to the collector of said second transistor.
Claim 8
Dependent Claim
102 words
An oscillator comprising a first transistor having a collector connected through a rectifier circuit and a load to an alternating current supply, an emitter connected to the alternating current supply through said rectifier circuit and said load, and a base; a second transistor having a collector connected to the collector of said first transistor through a first resistor, an emitter connected to said alternating current supply through said rectifier and said load and a base connected to the collector of said first transistor through a charge-discharge circuit; the base of said first transistor being connected to the collector of said second transistor.
Claim 9
Dependent Claim
49 words
An oscillator according to claim 5, including a first capacitor connected Between the collector and base of said second transistor, a second resistor connected between the base and emitter of said first transistor and a third resistor connected between the emitter of said first transistor and said rectifier circuit.
Claim 10
Dependent Claim
104 words
An oscillator as defined in claim 5, wherein said rectifier circuit is connected to a circuit comprising a silicon controlled rectifier of which an anode and a cathode are respectively connected to output terminals of said rectifier circuit, a second resistor connected between said anode of said silicon controlled rectifier and a third resistor, a first capacitor connected between said third resistor and said cathode of said silicon controlled rectifier, a bi-directional diode thyristor connected between a gate of said silicon controlled rectifier and both said first capacitor and said third resistor, and the third resistor connected between two input terminals of said oscillator.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |