US3569998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for generating a rectilinear sweep of voltage
Assignee: Iwatsu Electric Co Ltd
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Filing: 1968-12-03
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Granted: 1971-03-09
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Expires: 1988-12-03
Abstract
Abstract Apparatus for generating a rectilinear sweep of voltage in response to a triggering signal includes an integrator provided with a first DC coupled feedback path including an amplifier which is normally released and inhibits the integrator, a bistable circuit responsive to a triggering signal to inhibit the amplifier and release the integrator whereby a rectilinear sweep of voltage is generated by the circuit, and a second feedback path from the output of the integrator to the input of the bistable circuit to reset the bistable circuit when the output of the integrator reaches a predetermined level.
Inventors
- 👤 Hisashi Eguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:05
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/50; H03K4/56; G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/24; H03K4/787; H03K4/793
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
174 words
Apparatus for generating a rectilinear sweep of voltage in response to a triggering signal, the apparatus comprising an integrating circuit of which the output is coupled to the input thereof through a first DC coupled negative feedback circuit including an amplifier such that, in operation, the integrating function of the integrating circuit is normally inhibited; and means for releasing the intregrating circuit to perform its integrating function and provide a rectilinear sweep of output voltage, comprising a bistable circuit coupled to the amplifier and responsive to a triggering signal to change its state from a reset state in which the amplifier is released and functions in the negative feedback circuit to inhibit the integrating circuit, to a set state in which the amplifier is inhibited in its feedback function and releases the integrating circuit to perform its integrating function, and a second feedback circuit from the output of the integrating circuit to the input of the bistable circuit to reset the bistable circuit when the output of the integrating circuit reaches a predetermined valve.
Claim 2
Dependent Claim
174 words
Apparatus for generating a rectilinear sweep of voltage in response to a triggering signal, the apparatus comprising an integrating circuit of which the output is coupled to the input thereof through a first DC coupled negative feedback circuit including an amplifier such that, in operation, the integrating function of the integrating circuit is normally inhibited; and means for releasing the intregrating circuit to perform its integrating function and provide a rectilinear sweep of output voltage, comprising a bistable circuit coupled to the amplifier and responsive to a triggering signal to change its state from a reset state in which the amplifier is released and functions in the negative feedback circuit to inhibit the integrating circuit, to a set state in which the amplifier is inhibited in its feedback function and releases the integrating circuit to perform its integrating function, and a second feedback circuit from the output of the integrating circuit to the input of the bistable circuit to reset the bistable circuit when the output of the integrating circuit reaches a predetermined valve.
Claim 3
Dependent Claim
57 words
Apparatus according to claim 1, wherein a gate circuit is connected between the amplifier and the input to the integrating circuit, the arrangement being such that when the amplifier is released to inhibit the integrating circuit the gate circuit is opened, and when the amplifier is inhibited to release the integrating circuit the gate circuit Is closed.
Claim 4
Dependent Claim
31 words
Apparatus according to claim 1, wherein the amplifier is a differential amplifier with one input coupled to the bistable circuit and the other input to the output of the integrating circuit.
Claim 5
Dependent Claim
39 words
Apparatus according to claim 3, wherein the coupling between the output of the integrating circuit and the differential amplifier includes a clipping circuit to limit the input to the differential amplifier from the integrating circuit to a predetermined level.
Claim 6
Dependent Claim
17 words
Apparatus according to claim 3, wherein the amplifier comprises two transistors arranged in a long-tailed pair circuit.
Claim 7
Dependent Claim
27 words
Apparatus according to claim 1, wherein the bistable circuit comprises an Esaki or tunnel diode and a transistor arranged to have its base driven by the diode.
Claim 8
Dependent Claim
13 words
Apparatus according to claim 2, wherein the gate circuit comprises a series-connected diode.
Claim 9
Dependent Claim
56 words
Apparatus according to claim 1, wherein the integrating circuit comprises a source of potential connected through a resistor to the gate electrode of a field-effect transistor coupled as a source-follower to the base of a Planar transistor and a capacitor connected from the collector of the Planar transistor to the gate electrode of the field-effect transistor.
Claim 10
Dependent Claim
18 words
Apparatus according to claim 4, wherein the clipping circuit includes a biased shunting diode and a series diode.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |