US3894249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for generating variable output voltage
Assignee: Panasonic Holdings Corp
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Filing: 1973-12-14
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Granted: 1975-07-08
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Expires: 1993-12-14
Abstract
Abstract A monostable multivibrator is connected to the input of a device for generating a variable output voltage, in which the output voltage derived from the source of a MOS field-effect transistor is varied in response to the variation of a voltage across a capacitor connected to the gate of the field-effect transistor. The output voltage may be increased and decreased stepwise.
Inventors
- 👤 Shunji Minami
- 👤 Shunzo Oka
- 👤 Takehide Takemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:49
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/02; H03K4/023
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
168 words
A device for generating variable output voltage comprising a. a MOS field-effect transistor, b. a non-polarized capacitor connecting the gate of said MOS field-effect transistor to ground, c. a neon bulb, d. an input resistor connected in series with the neon bulb, e. a monostable multivibrator means connected to the gate of said MOS field-effect transistor through said input resistor and said neon bulb for providing a single square wave output pulse in response to an input signal, said square wave output pulse having a predetermined electrical potential and a duration sufficient only to charge said non-polarized capacitor through said input resistor and said neon bulb to a potential that is less than one-half the predetermined electrical potential. f. a switch connected to said monostable multivibrator means for providing said input signal, and g. an output resistor connectiNg the source of said MOS fieldeffect transistor to ground, whereby when said switch is repeatedly closed, the output voltage derived from the source of said MOS field-effect transistor increases stepwise.
Claim 2
Independent Claim
168 words
A device for generating variable output voltage comprising a. a MOS field-effect transistor, b. a non-polarized capacitor connecting the gate of said MOS field-effect transistor to ground, c. a neon bulb, d. an input resistor connected in series with the neon bulb, e. a monostable multivibrator means connected to the gate of said MOS field-effect transistor through said input resistor and said neon bulb for providing a single square wave output pulse in response to an input signal, said square wave output pulse having a predetermined electrical potential and a duration sufficient only to charge said non-polarized capacitor through said input resistor and said neon bulb to a potential that is less than one-half the predetermined electrical potential. f. a switch connected to said monostable multivibrator means for providing said input signal, and g. an output resistor connectiNg the source of said MOS fieldeffect transistor to ground, whereby when said switch is repeatedly closed, the output voltage derived from the source of said MOS field-effect transistor increases stepwise.
Claim 3
Dependent Claim
22 words
A device for generating variable output voltage as defined in claim 1 wherein said monstable multivibrator comprises a pair of PNP transistors.
Claim 4
Dependent Claim
57 words
A device for generating variable output voltage as defined in claim 1 wherein the gate of said MOS field-effect transistor is connected through a control resistor to a second neon bulb, whereby an output voltage which increases stepwise to a predetermined level by a predetermined number of steps and then falls to zero may be repeatedly generated.
Claim 5
Dependent Claim
143 words
A device for generating variable output voltage as defined in claim 1 further comprising a second monostable multivibrator means comprising a pair of transistors of one conductivity type wherein the first monostable multivibrator means comprises a pair of transistors of the opposite conductivity type, a switch connected to the base of one of said pairs of transistors of said second monostable multivibrator means, and the collector of the other transistor of said second monostable multivibrator means being connected to said one terminal of said neon bulb, and a second switch for providing an input signal to said second monostable multivibrator means, whereby when the switch of one of said first and second monostable multivibrator means is closed, the output voltage may be increased stepwise while when the switch of the other monostable multivibrator means is closed, the output voltage may be decreased stepwise.
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) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |