US3731201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for generating radio frequencies
Assignee: TDK Micronas GmbH
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Filing: 1970-11-12
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Granted: 1973-05-01
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Expires: 1990-11-12
Abstract
Abstract The invention provides a general purpose RF oscillator which may have any of many uses, depending upon bias and voltage levels which may be used. An LC circuit is repeatedly triggered into self-damped bursts of RF oscillations responsive to a relaxation oscillator which is recurringly triggered by a negative impedance device. The time at which the relaxation oscillator is triggered may be varied as a function of an analog signal to thereby produce a repetition rate modulation of the analog. Also, the negative impedance characteristic of the trigger device may be used to gain a tremendous amount of momentary amplification which provides an amount of power that is adequate to generate vast quantities of heat. Therefore, at the low voltage end of the scale, the RF generator may be used as a transmitter for walkietalkies, and at the high voltage end of the scale the RF generator may be used as an oven. In between these two ends of the scale, the generator has many other uses.
Inventors
- 👤 J Frisbie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:20
CPC Classifications
H; H03; H03B; H03B7/00; H03B7/02; H03B7/06; H03K; H03K3/00; H03K3/80
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
191 words
A circuit arrangement for generating radio frequencies, and suitable for use in for example a radio telephone, comprising an oscillator circuit tuned to a radio frequency and arranged to generate a self-damped burst of r.f. energy in response to being shock excited by way of an input source, first means providing said input source, said first means including a voltage source, means operatively coupled to the voltage source for storing current, and negative impedance switch means coupled between said tuned circuit and said storage means, said switch means having characteristics causing it to turn-on responsive to the voltage thereacross reaching a predetermined level, the arrangement of said switch means in being coupled between said storage means and said tuned circuit being such as to cause said tuned circuit to be shock excited responsive to said switch means turning-on by reaching said predetermined level, and second means including a source of analog signal voltage coupled to said storage means for varying the rise time of the voltage across said switch means as a function of the analog signal, thereby correspondingly varying the time required for the voltage to reach said predetermined level.
Claim 2
Dependent Claim
191 words
A circuit arrangement for generating radio frequencies, and suitable for use in for example a radio telephone, comprising an oscillator circuit tuned to a radio frequency and arranged to generate a self-damped burst of r.f. energy in response to being shock excited by way of an input source, first means providing said input source, said first means including a voltage source, means operatively coupled to the voltage source for storing current, and negative impedance switch means coupled between said tuned circuit and said storage means, said switch means having characteristics causing it to turn-on responsive to the voltage thereacross reaching a predetermined level, the arrangement of said switch means in being coupled between said storage means and said tuned circuit being such as to cause said tuned circuit to be shock excited responsive to said switch means turning-on by reaching said predetermined level, and second means including a source of analog signal voltage coupled to said storage means for varying the rise time of the voltage across said switch means as a function of the analog signal, thereby correspondingly varying the time required for the voltage to reach said predetermined level.
Claim 3
Dependent Claim
37 words
The circuit of claim 1 wherein said source of analog signal comprises a source of voice frequency of non-uniformly varying voltage to produce a corresponding non-uniform time displacement of the turn-on of said negative impedance switch means.
Claim 4
Dependent Claim
18 words
The circuit of claim 1 wherein said negative impedance switch means comprises at least one PN PN diode.
Claim 5
Dependent Claim
169 words
An electrical heating arrangement comprising first means for developing voltages at kilowatt levels from a source of alternating current, negative impedance switch means coupled across said source, said switch means comprising a plurality of serially connected negative impedance devices, the devices of said plurality having cumulative characteristics by which the plurality turns on and off as a function of the voltage from said first means, second means coupled to said negative switch means and to said first means for accumulating an electrical charge while said switch means is off, a tuned r.f. circuit coupled to said charge accumulating means wherein said accumulated charge is applied to said tuned r.f. circuit to cause same to oscillate at power radiating levels, and wherein the heat radiation power developed from said tuned circuit is primarily generated when said switch devices of said switch means, in turning-on, pass through the negative impedance operating range thereof, with said switch means in said operating range contributing power to the shock-excitation oscillation in the tuned circuit.
Claim 6
Dependent Claim
169 words
An electrical heating arrangement comprising first means for developing voltages at kilowatt levels from a source of alternating current, negative impedance switch means coupled across said source, said switch means comprising a plurality of serially connected negative impedance devices, the devices of said plurality having cumulative characteristics by which the plurality turns on and off as a function of the voltage from said first means, second means coupled to said negative switch means and to said first means for accumulating an electrical charge while said switch means is off, a tuned r.f. circuit coupled to said charge accumulating means wherein said accumulated charge is applied to said tuned r.f. circuit to cause same to oscillate at power radiating levels, and wherein the heat radiation power developed from said tuned circuit is primarily generated when said switch devices of said switch means, in turning-on, pass through the negative impedance operating range thereof, with said switch means in said operating range contributing power to the shock-excitation oscillation in the tuned circuit.
Claim 7
Dependent Claim
21 words
The device of claim 4 wherein said tuned R.F. circuit comprises a coiled tube and coolant circulated through said coiled tube.
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |