Patent JPH066031A successfully refreshed from Google Patents.
US3983503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage amplifier
Assignee: Massachusetts Institute of Technology
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Filing: 1974-09-23
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Granted: 1976-09-28
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Expires: 1994-09-23
Abstract
Abstract A linear amplifier that is able to yield a maximum output voltage substantially greater than the breakdown voltage of the individual amplifying elements used and substantially greater than the voltage of a primary electric energy source that powers the amplifier. The amplifier consists of a plurality of stages connected in cascade, each stage, in turn, controlling the voltage level at which subsequent stages operate.
Inventors
- 👤 Lawrence H. Bannister
- 👤 Richard H. Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:11
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/42
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
A linear amplifier having a plurality of stages connected in cascade including an input and an output stage, each of said stages including a transistor having an emitter, a collector and a base, said emitter and collector forming a series circuit between adjacent stages of the cascade, and a bias circuit connected to the base, each bias circuit including a bias resistor through which bias voltage is applied to the base and a separate source of bias potential connected to the bias resistor, the source of bias potential connected to the bias resistor of the input stage being a primary source of voltage while each of the other sources of bias potential is interconnected between the base and the bias resistor of the next succeeding stage.
Claim 2
Dependent Claim
126 words
A linear amplifier having a plurality of stages connected in cascade including an input and an output stage, each of said stages including a transistor having an emitter, a collector and a base, said emitter and collector forming a series circuit between adjacent stages of the cascade, and a bias circuit connected to the base, each bias circuit including a bias resistor through which bias voltage is applied to the base and a separate source of bias potential connected to the bias resistor, the source of bias potential connected to the bias resistor of the input stage being a primary source of voltage while each of the other sources of bias potential is interconnected between the base and the bias resistor of the next succeeding stage.
Claim 3
Dependent Claim
17 words
The combination of claim 1 wherein each of said other sources of bias potential comprises a battery.
Claim 4
Dependent Claim
37 words
The combination of claim 2 including an emitter follower connected across each said bias resistor for reducing interstage impedance between the battery supplying bias voltage to one stage and the bias circuit of the next succeeding stage.
Claim 5
Dependent Claim
25 words
The combination of claim 1 wherein each of said other sources of bias potential includes a capacitor interconnected between the bias resistors of adjacent stages.
Claim 6
Dependent Claim
21 words
The combination of claim 4 that includes diode means connected to charge each said capacitor from the primary source of voltage.
Claim 7
Dependent Claim
37 words
The combination of claim 4 including an emitter follower connected across each said bias resistor for reducing interstage impedance between the capacitor supplying bias voltage to one stage and the bias circuit of the next succeeding stage.
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) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |