US3908136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analogue gates
Assignee: Thales SA
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Filing: 1974-05-02
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Granted: 1975-09-23
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Expires: 1994-05-02
Abstract
Abstract An analogue gate with a short response time comprises a fieldeffect transistor whose source or drain is connected to the input, the other electrode to the output. It is triggered from the blocking to the conducting state by a follower which places the gate voltage at the same level as the source voltage and is blocked by means which establish a conductive path from the gate to a suitable voltage source.
Inventors
- 👤 Serge Desperques-Volmier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:36
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/80; H10D84/87; H03; H03K; H03K17/00; H03K17/04; H03K17/042; H03K17/04206; H03K17/51; H03K17/56; H03K17/687; H10D84/82; H10D84/83; H10D84/83125
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
An analogue gate comprising a first field-effect transistor, having a source receiving the input voltage, a drain supplying the output voltage and a gate, a switch, having one output connected to said transistor gate, a first input connected to a fixed potential capable of blocking said transistor, and a second input; a voltage follower, having an input connected to said drain, an output connected to said second switch input; said switch having a control input, for switching at will, said two switch inputs to said switch output.
Claim 2
Dependent Claim
87 words
An analogue gate comprising a first field-effect transistor, having a source receiving the input voltage, a drain supplying the output voltage and a gate, a switch, having one output connected to said transistor gate, a first input connected to a fixed potential capable of blocking said transistor, and a second input; a voltage follower, having an input connected to said drain, an output connected to said second switch input; said switch having a control input, for switching at will, said two switch inputs to said switch output.
Claim 3
Dependent Claim
77 words
A gate as claimed in claim 1 wherein said switch comprises a second transistor, having a source at a fixed potential, a drain and a gate for receiving a two-level voltage for blocking or unblocking said transistor, a third transistor having a source, a gate and a drain connected to said voltage follower output, said third transistor gate being connected to said second transistor drain, a resistor interconnecting said second transistor drain and said third transistor source.
Claim 4
Dependent Claim
62 words
A gate as claimed in claim 2, wherein said voltage follower comprises a fourth transistor having a drain connected to another fixed potential of a polarity opposite to said fixed potential, a gate connected to said first transistor drain, and a source connected to said third transistor drain, and a further resistor for connecting said fourth transistor source to said fixed potential.
Claim 5
Dependent Claim
35 words
A gate as claimed in claim 3, wherein said further resistor comprises, a fifth transistor, having a drain connected to said fourth transistor source and a gate and a source interconnected to said fixed potential.
Claim 6
Dependent Claim
19 words
A gate as claimed in claim 4, wherein said transistors are of the depletion type and have N-type channels.
Claim 7
Dependent Claim
14 words
A gate as claimed in claim 1 having components integrated upon the same substrate.
References Cited (Backward Citations)
US3586880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |