Patent US3922569A successfully refreshed from Google Patents.
US3922569A
Expired / Lapsed
US
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Potential detector
Assignee: Mitsubishi Electric Corp
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Filing: 1974-01-22
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Granted: 1975-11-25
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Expires: 1994-01-22
Abstract
Abstract A p and an n channel MOS field effect transistor have their drains connected together to an output terminal, their gates connected together to an input terminal and their sources connected across a dc source to form an inverter. A plurality of such inverters having different threshold voltages are connected at their input terminal to an analog member to be detected. The threshold voltage of each inverter is determined by a ratio of mutual conductance of one to the other of the drain and source between the two mating transistors.
Inventors
- 👤 Hiroshi Nabetani
- 👤 Atsushi Ueda
- 👤 Kosaku Uota
- 👤 Mitsuaki Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:53
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/165; G01R19/16504; G01R19/16519
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A detector device for detecting electric potentials wherein said device includes a plurality of pairs of complementary MOS field effect transistors having respective input terminals connected together, an analog detected member comprised of a pair of electric lamps serially connected across source of direct current and one resistor connected across each of said electric lamps, said resistors having therebetween a ratio of a value of resistance substantially equal to that between said electrical lamps and being higher in the value of resistance than said electrical lamps, and wherein a point at which said electrical lamps are serially interconnected is connected to a common input terminal while in the normal operation of said electrical lamps, said common input terminal has a potential higher than a threshold voltage on one of said pairs of complementary MOS field effect transistors and lower than a threshold voltage of the other complementary MOS field effect transistors.
Claim 2
Dependent Claim
151 words
A detector device for detecting electric potentials wherein said device includes a plurality of pairs of complementary MOS field effect transistors having respective input terminals connected together, an analog detected member comprised of a pair of electric lamps serially connected across source of direct current and one resistor connected across each of said electric lamps, said resistors having therebetween a ratio of a value of resistance substantially equal to that between said electrical lamps and being higher in the value of resistance than said electrical lamps, and wherein a point at which said electrical lamps are serially interconnected is connected to a common input terminal while in the normal operation of said electrical lamps, said common input terminal has a potential higher than a threshold voltage on one of said pairs of complementary MOS field effect transistors and lower than a threshold voltage of the other complementary MOS field effect transistors.
References Cited (Backward Citations)
US3631528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |