POWER AMPLIFIER WITH BIAS CONTROL

European Patent Office Patent

APP PUB NO EP-1579569-A1
SERIAL NO

03773896

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Abstract

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A power amplifier (100) suitable for use in mobile telecommunications equipment has a first stage (2) and an optional second stage (2), each stage being provided with a bias circuit (4, 5). To provide a well-defined gain characteristic, in the first stage (1) a bias current (Ib1) is fed into a signal amplifying transistor (T1). The first bias circuit (4) comprises non-linear a voltage/current converter (41) coupled to a current mirror (40). To suit alternative applications, such as GSM and UMTS requiring a different bias, plural voltage/current converters (41, 42) may be provided in parallel.

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Patent Owner(s)

Patent OwnerAddress
KONINKL PHILIPS ELECTRONICS NVNLHOLLAND IAN DEHO FINN

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Inventor(s)

Inventor Name Address
VAN BEZOOIJEN ADRIANUS MOLENHOEK
PRIKHODKO DMITRY P NL-5656 AA EINDHOVEN

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