Patent EP0658977A1 successfully refreshed from Google Patents.
EP0658977A1
Expired / Lapsed
EP
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Variable gain amplifier
Assignee: Teledyne e2v Semiconductors SAS
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Filing: 1994-12-13
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Granted: —
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Expires: 2014-12-13
Abstract
Abstract The invention relates to a variable-gain amplifier consisting of n elementary amplifiers in parallel and comprising means (SnA, SnB) making it possible to select the elementary amplifier of rank j (j = 1, 2, ..., n) according to the desired gain, characterised in that each elementary amplifier is of the common-base type and comprises means (Dn, Rn, In) making it possible to obtain a low value of input impedance which is independent of the gain of the selected amplifier. The invention applies more particularly to the input stages of an amplification chain for receiving circuits requiring good performance in terms of noise. <IMAGE>
Inventors
- 👤 Jean-François Debroux
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:39
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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