US3889133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Output-voltage variable device
Assignee: Panasonic Holdings Corp
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Filing: 1973-03-12
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Granted: 1975-06-10
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Expires: 1993-03-12
Abstract
Abstract An output-voltage variable device utilizing a metal oxide semiconductor field-effect transistor is disclosed. A single pole double throw center off switch whose movable contact arm is connected to the gate of the field-effect transistor has its fixed contacts connected to a positive and negative power supplies, and a non-polarized capacitor is inserted between the gate of the field-effect transistor and ground. When the capacitor is charged with the positive charge, the output voltage derived from the source of the field-effect transistor is increased, but when the capacitor is charged with the negative charge, the output voltage is decreased. When the switch is in a neutral position, a constant output voltage may be maintained.
Inventors
- 👤 Shunzo Oka
- 👤 Shunji Minami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:15
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/50; G; G01; G01R; G01R15/00; G01R15/002; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/24; G11; G11C; G11C27/00; G11C27/02; G11C27/024; G11C27/026
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
340 words
An output-voltage variable device comprising a. a metal oxide semiconductor field-effect transistor having a gate, a drain and a source, b. an input resistor, a neon discharge lamp connected in series with the input resistor, a single-pole double-throw center-off switch having a movable contact arm connected through said input resistor and said neon discharge lamp to the gate of said field-effect transistor and having fixed positive and negative contacts connected to positive and negative DC sources, respectively, and connected to said movable contact arm by operative movement of said arm, c. a non-polarized capacitor connected between said gate of said field-effect transistor and ground, d. a drain resistor connected between the drain of said fieldeffect transistor and a positive DC supply, e. an output resistor connected between the source of said field-effect transistor and ground, f. an output terminal connected to said output resistor for deriving an output voltage whereby movement of said movable contact arm from the positive to the negative source and from the negative source to the positive source gradually charges and discharges said non-polarized capacitor, the output voltage thereby following the voltage on said non-polarized capacitor, g. a casing for housing therein said MOS field-effect transistor, said input resistor, said switch, said capacitor, said drain resistor and said output resistor, said casing being provided with a positive input terminal electrically connected to said positive contact of said switch, a negative terminal electrically connected to said negative contact, a bias terminal electrically connected to said drain resistor, an output terminal electrically connected to said source of said field-effect transistor, and a ground terminal electrically connected to the grounding end of said capacitor and said output resistor, all of said terminals of said casing being used for external connections to said positive and negative DC sources, said bias DC supply, and ground, h. an operating shaft drivingly connected to said movable contact arm, and i. a variable resistor mechanically connected to said shaft, said variable resistor being adjusted simultaneously with the actuation of said single-pole double-throw center-off switch.
Claim 2
Dependent Claim
340 words
An output-voltage variable device comprising a. a metal oxide semiconductor field-effect transistor having a gate, a drain and a source, b. an input resistor, a neon discharge lamp connected in series with the input resistor, a single-pole double-throw center-off switch having a movable contact arm connected through said input resistor and said neon discharge lamp to the gate of said field-effect transistor and having fixed positive and negative contacts connected to positive and negative DC sources, respectively, and connected to said movable contact arm by operative movement of said arm, c. a non-polarized capacitor connected between said gate of said field-effect transistor and ground, d. a drain resistor connected between the drain of said fieldeffect transistor and a positive DC supply, e. an output resistor connected between the source of said field-effect transistor and ground, f. an output terminal connected to said output resistor for deriving an output voltage whereby movement of said movable contact arm from the positive to the negative source and from the negative source to the positive source gradually charges and discharges said non-polarized capacitor, the output voltage thereby following the voltage on said non-polarized capacitor, g. a casing for housing therein said MOS field-effect transistor, said input resistor, said switch, said capacitor, said drain resistor and said output resistor, said casing being provided with a positive input terminal electrically connected to said positive contact of said switch, a negative terminal electrically connected to said negative contact, a bias terminal electrically connected to said drain resistor, an output terminal electrically connected to said source of said field-effect transistor, and a ground terminal electrically connected to the grounding end of said capacitor and said output resistor, all of said terminals of said casing being used for external connections to said positive and negative DC sources, said bias DC supply, and ground, h. an operating shaft drivingly connected to said movable contact arm, and i. a variable resistor mechanically connected to said shaft, said variable resistor being adjusted simultaneously with the actuation of said single-pole double-throw center-off switch.
Claim 3
Dependent Claim
36 words
A device as defined in claim 1, further comprising a second operating shaft coaxially and rotatably mounted on said first operating shaft, and a plurality of additional variable resistors drivingly coupled to said second operating shaft.
Claim 4
Dependent Claim
264 words
An output voltage variable device comprising a. a metal oxide semiconductor field-effect transistor, having a gate, a drain and a source, b. an input resistor, a neon discharge lamp connected in series with the input resistor, a switch having a movable contact arm connected through said input resistor and said neon discharge lamp to the gate of said field-effect transistor, and having fixed positive and negative contacts connected to positive and negative DC sources, respectively, and connected to said movable contact arm by operative movement of said arm, c. a non-polarized capacitor connected between said gate of said field-effect transistor and ground, d. a drain resistor connected between the drain of said field-effect transistor and a positive DC supply, e. an output resistor connected between the source of said field-effect transistor and ground, f. an output terminal connected to said output resistor for deriving an output voltage whereby movement of said movable contact arm from the positive to the negative source and from the negative source to the positive source gradually charges and discharges said non-polarized capacitor, the output voltage thereby following the voltage on said non-polarized capacitor, and g. the voltage-resistor converter means connected to the output terminal of the device for changing the output voltage to a corresponding resistance, said converter comprising a light-emitting element means for converting said output voltage into light, and a photo-conductive cell having an output terminal and adapted to receive light emitted from said light-emitting element, whereby at the output terminal of said photo-conductive cell a resistance corresponding to the voltage across said non-polarized capacitor is obtained.
Claim 5
Dependent Claim
264 words
An output voltage variable device comprising a. a metal oxide semiconductor field-effect transistor, having a gate, a drain and a source, b. an input resistor, a neon discharge lamp connected in series with the input resistor, a switch having a movable contact arm connected through said input resistor and said neon discharge lamp to the gate of said field-effect transistor, and having fixed positive and negative contacts connected to positive and negative DC sources, respectively, and connected to said movable contact arm by operative movement of said arm, c. a non-polarized capacitor connected between said gate of said field-effect transistor and ground, d. a drain resistor connected between the drain of said field-effect transistor and a positive DC supply, e. an output resistor connected between the source of said field-effect transistor and ground, f. an output terminal connected to said output resistor for deriving an output voltage whereby movement of said movable contact arm from the positive to the negative source and from the negative source to the positive source gradually charges and discharges said non-polarized capacitor, the output voltage thereby following the voltage on said non-polarized capacitor, and g. the voltage-resistor converter means connected to the output terminal of the device for changing the output voltage to a corresponding resistance, said converter comprising a light-emitting element means for converting said output voltage into light, and a photo-conductive cell having an output terminal and adapted to receive light emitted from said light-emitting element, whereby at the output terminal of said photo-conductive cell a resistance corresponding to the voltage across said non-polarized capacitor is obtained.
Claim 6
Dependent Claim
172 words
A device as defined in claim 3, wherein said switch is a single-pole double-throw center-off switch, further comprising a casing for housing thereIn said MOS field-effect transistor, said input resistor, said switch, said capacitor, said drain resistor and said output resistor, said casing provided with a positive input terminal electrically connected to said positive contact of said switch, a negative terminal electrically connected to said negative contact, a bias terminal electrically connected to said drain resistor, an output terminal electrically connected to said source of said field-effect transistor, and a ground terminal electrically connected to the grounding ends of said capacitor and said output resistor, all of said terminals of said casing being used for external connections to said positive and negative DC sources, said bias DC supply, and ground, said casing further having therein a variable resistor drivingly coupled to said movable contact arm, and a variable resistor drivingly coupled to said operating shaft, whereby the single-pole double-throw center-off switch may be adjusted simultaneously with the adjustment of said variable resistor.
Claim 7
Dependent Claim
36 words
A device as defined in claim 4, further comprising a second operating shaft coaxially and rotatably mounted on said first operating shaft, and a plurality of additional variable resistors drivingly coupled to the second operating shaft.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |