US3603891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifying device with wide transmission band and slight drift enabling a continuous component to be transmitted
Assignee: CONST RADIOELEC ELECTRON
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Filing: 1968-05-28
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Granted: 1971-09-07
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Expires: 1988-05-28
Abstract
Abstract An amplifying arrangement having a wide transmission band and slight drift which enables a continuous high frequency signal component to be transmitted uses two amplifiers, a first one with a wide transmission band and high input impedance and a second one with a low drift and slight transmission band, the inputs of the second amplifier being connected one to a reference fixed potential, the other to one of the inputs of the first amplifier, the output of the second amplifier being connected to the second input of the first amplifier, thus elaborating at the output of the first amplifier a representative signal of the error committed by the first amplifier, said signal being injected in the input of the second amplifier for controlling the first amplifier.
Inventors
- 👤 Bernard Jules Alexandre Simeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:10
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/343; H03F3/345; H03F3/3455; H03F1/00; H03F1/30; H03F1/306; H03F1/34; H03F1/342; H03F1/42; H03F1/48; H03F1/486
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
310 words
An amplifying device having a wide transmission band, low drift and enabling a continuous component to be transmitted from a high-frequency signal which comprises: a first high-frequency amplifier having a wide transmission band and high input impedance, said first amplifier including a first transistor of the field effect type forming a high input impedance stage and to the input of which the high-frequency signal is connected, the output of said first transistor being connected through a capacitor to the base of a second transistor, the emitter of said second transistor being connected to the base input of a third transistor through a pair of series-connected resistances, the emitter of said third transistor constituting the amplifier output for said high-frequency signal, a feedback circuit connected from the output of said first amplifier through a pair of series-connected impedances to the input thereof; a second dual input amplifier having a low drift, larger amplification than that of said first amplifier, small transmission band and low impedance which serves as an error correction amplifier for said first amplifier, a reference potential connected to a first input of said second amplifier, the second input of said second amplifier being connected to a tap between said series-connected impedances, the output from said second amplifier being connected to the input base of a fourth transistor, the emitter of said fourth transistor being connected to the emitter of a fifth transistor, the collector of said fifth transistor being connected to the base of said third transistor, a Zener diode having its cathode terminal connected to the base of said fifth transistor and its other terminal connected to a tap between said series-connected resistors, and a potential source for applying the operating potentials to said transistors, said potential source being connected to the collectors of said second, third and fourth transistors and also to said field effect transistor.
Claim 2
Dependent Claim
310 words
An amplifying device having a wide transmission band, low drift and enabling a continuous component to be transmitted from a high-frequency signal which comprises: a first high-frequency amplifier having a wide transmission band and high input impedance, said first amplifier including a first transistor of the field effect type forming a high input impedance stage and to the input of which the high-frequency signal is connected, the output of said first transistor being connected through a capacitor to the base of a second transistor, the emitter of said second transistor being connected to the base input of a third transistor through a pair of series-connected resistances, the emitter of said third transistor constituting the amplifier output for said high-frequency signal, a feedback circuit connected from the output of said first amplifier through a pair of series-connected impedances to the input thereof; a second dual input amplifier having a low drift, larger amplification than that of said first amplifier, small transmission band and low impedance which serves as an error correction amplifier for said first amplifier, a reference potential connected to a first input of said second amplifier, the second input of said second amplifier being connected to a tap between said series-connected impedances, the output from said second amplifier being connected to the input base of a fourth transistor, the emitter of said fourth transistor being connected to the emitter of a fifth transistor, the collector of said fifth transistor being connected to the base of said third transistor, a Zener diode having its cathode terminal connected to the base of said fifth transistor and its other terminal connected to a tap between said series-connected resistors, and a potential source for applying the operating potentials to said transistors, said potential source being connected to the collectors of said second, third and fourth transistors and also to said field effect transistor.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |