US4152662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preamplifier having integrated circuitry
Assignee: Trio KK
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Filing: 1978-02-01
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Granted: 1979-05-01
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Expires: 1998-02-01
Abstract
Abstract In a preamplifier having integrated circuitry, the improvement where the active elements of the first stage amplification of the preamplifier and the resistor which establishes the current flowing through these active elements are mounted on the outside of the integrated circuitry and the connecting terminals for the active elements and resistor are disposed with the remaining preamplifier components inside the integrated circuitry.
Inventors
- 👤 Kazumasa Sakai
- 👤 Hiroshi Watanuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:45
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071; H03F2200/00; H03F2200/372
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
85 words
In an amplifier having integrated circuitry, the improvement where only the active elements of the first stage amplification of the amplifier and a resistor which establishes the current flowing through these active elements are mounted on the outside of the integrated circuitry and the connecting terminals for the active elements and resistor are disposed with the remaining amplifier components inside the integrated circuitry, said amplifier including differential inputs and where said active elements consist of a pair of transistors respectively connected to said differential inputs.
Claim 2
Dependent Claim
85 words
In an amplifier having integrated circuitry, the improvement where only the active elements of the first stage amplification of the amplifier and a resistor which establishes the current flowing through these active elements are mounted on the outside of the integrated circuitry and the connecting terminals for the active elements and resistor are disposed with the remaining amplifier components inside the integrated circuitry, said amplifier including differential inputs and where said active elements consist of a pair of transistors respectively connected to said differential inputs.
Claim 3
Dependent Claim
116 words
An amplifier having integrated circuit comprising a first stage amplifying means including acitvie amplification means and resistor means for establishing the current flow through said active amplification means; differential inputs where said active amplification means includes a pair of transistors respectively connected to said differential inputs; further circuit means in circuit with said active amplification means and said resistor means, said further circuit means being incorporated in said integrated circuit; said active amplification means and said resistor means being disposed outside said integrated circuit; and said further circuit means comprising a constant current transistor disposed within said integrated circuitry, said constant current transistor being in series circuit with said pair of transistors and said resistor means.
Claim 4
Dependent Claim
116 words
An amplifier having integrated circuit comprising a first stage amplifying means including acitvie amplification means and resistor means for establishing the current flow through said active amplification means; differential inputs where said active amplification means includes a pair of transistors respectively connected to said differential inputs; further circuit means in circuit with said active amplification means and said resistor means, said further circuit means being incorporated in said integrated circuit; said active amplification means and said resistor means being disposed outside said integrated circuit; and said further circuit means comprising a constant current transistor disposed within said integrated circuitry, said constant current transistor being in series circuit with said pair of transistors and said resistor means.
Claim 5
Dependent Claim
11 words
A preamplifier as in claim 2 where said transistors are bipolar.
Claim 6
Dependent Claim
41 words
A preamplifier as in claim 2 where said transistors have (a) control terminals respectively connected to said differential inputs, (b) input terminals connected to each other and to said resistor means and (c) output terminals connected to said further circuit means.
Claim 7
Dependent Claim
22 words
A preamplifier as in claim 2 where said constant current transistor is disposed between said pair of transistors and said resistor means.
Claim 8
Dependent Claim
110 words
An amplifier having integrated circuit comprising a first stage amplifying means including active amplification means and resistor means in series circuit with said active amplification means for establishing the current flow through said active amplification means; further circuit means in circuit with said active amplification means and said resistor means, said further circuit means being incorporated in said integrated circuit; said active amplification means and said resistor means being disposed outside said integrated circuit; and said integrated circuit including first, second and third terminals for connecting said active amplification means to said further circuit means and fourth and fifth terminals for connecting said resistor means to said further circuit means.
Claim 9
Dependent Claim
110 words
An amplifier having integrated circuit comprising a first stage amplifying means including active amplification means and resistor means in series circuit with said active amplification means for establishing the current flow through said active amplification means; further circuit means in circuit with said active amplification means and said resistor means, said further circuit means being incorporated in said integrated circuit; said active amplification means and said resistor means being disposed outside said integrated circuit; and said integrated circuit including first, second and third terminals for connecting said active amplification means to said further circuit means and fourth and fifth terminals for connecting said resistor means to said further circuit means.
Claim 10
Dependent Claim
26 words
An amplifier as in claim 6 including differential inputs and where said active amplification means includes a pair of transistors respectively connected to said differential inputs.
References Cited (Backward Citations)
US3369187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |