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US3967216A
Expired / Lapsed
US
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Pulse generator stabilized for change of ambient temperature and source voltage
Assignee: Sanyo Electric Co Ltd
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Filing: 1975-04-02
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Granted: 1976-06-29
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Expires: 1995-04-02
Abstract
Abstract A pulse generator which can be applied to a horizontal deflection circuit and/or a vertical deflection circuit of a television set and of which almost all parts can be easily manufactured in a single IC (Integrated Circuit) chip has been found. A capacitor in an integrator circuit is charged and discharged alternately. The voltage across said capacitor and a second voltage, which is controlled by said voltage across said capacitor, are compared with a predetermined voltage. According to the result of the comparison, the capacitor is charged or discharged and, thus, a pulse oscillation is provided.
Inventors
- 👤 Jyunji Sakamoto
- 👤 Eisuke Shiratani
- 👤 Norio Imaizumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:20
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/50; H03K4/501
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
A pulse generator comprising: a. a capacitor, one end of which is grounded; b. a charge circuit connected between the other end of said capacitor and a power source; c. a discharge circuit connected between said other end of said capacitor and ground; d. a comparator having first, second and third transistors, the emitters of these transistors being commonly connected and grounded through a first resistor, the base of the first transistor being connected to said other end of said capacitor, the base of the second transistor being connected to a constant reference voltage source, the base of the third transistor being connected to said other end of said capacitor through a second resistor and an additional transistor, and said base of the third transistor being further connected to the voltage source through a third resistor under the control of a switching transistor; and e. a switching circuit coupled to an output of said comparator for switching said charge circuit, said discharge circuit and said switching transistor according to the output of said comparator.
Claim 2
Dependent Claim
174 words
A pulse generator comprising: a. a capacitor, one end of which is grounded; b. a charge circuit connected between the other end of said capacitor and a power source; c. a discharge circuit connected between said other end of said capacitor and ground; d. a comparator having first, second and third transistors, the emitters of these transistors being commonly connected and grounded through a first resistor, the base of the first transistor being connected to said other end of said capacitor, the base of the second transistor being connected to a constant reference voltage source, the base of the third transistor being connected to said other end of said capacitor through a second resistor and an additional transistor, and said base of the third transistor being further connected to the voltage source through a third resistor under the control of a switching transistor; and e. a switching circuit coupled to an output of said comparator for switching said charge circuit, said discharge circuit and said switching transistor according to the output of said comparator.
Claim 3
Dependent Claim
51 words
A pulse generator according to claim 1, wherein said charge circuit is a resistor connected between the power source and said other end of said capacitor, and said discharge circuit is a series circuit of a resistor and a switching transistor connected between said other end of the capacitor and ground.
Claim 4
Dependent Claim
48 words
A pulse generator according to claim 1, wherein said constant reference voltage source comprises a series curcuit having a pair of resistors connected between the power source and ground and wherein the base of said second transistor is connected to the common point of said pair of resistors.
Claim 5
Dependent Claim
16 words
A pulse generator according to claim 1, wherein said charge circuit is a constant current circuit.
Claim 6
Dependent Claim
16 words
A pulse generator according to claim 1, wherein said discharge circuit is a constant current circuit.
References Cited (Backward Citations)
US3351871A
Cited
US3680003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |