2214304-A1 is referenced by 76 patents and cites 6 patents.

The invention relates to a Switch Mode Assisted Linear Amplifier (1), SMALA, for amplification of a baseband input signal (V S ), comprising: a linear stage (2) adapted to perform linear amplification of the baseband input signal (V s ), a hysteretic control stage (7) for generating a pulse-width modulated signal (V sw ) from a current (I lin ) produced by the linear stage (2), and a switching stage (8) adapted to amplify the pulse-width modulated signal (V sw ) to generate a further current (I sw ) which is added to the current (I lin ) of the linear stage (2). The hysteretic control stage (7) comprises a high-precision Schmitt trigger (7b) with two high-speed comparators, preferably having a rise time of less than ten nanoseconds, and with a RS flip-flop for generating a pulse-width modulated signal (V sw ) being well-defined over the entire amplified baseband frequency range.

Switch mode assisted linear amplifier for baseband signal amplification
Application Number
EP20090001271 20090130
Publication Number
EP2214304 (A1)
Application Date
January 30, 2009
Publication Date
August 4, 2010
Wiegner Dirk
Luz Gerhard
Machinal Robin
Alcatel Lucent Deutschland
H03K 03/00
H03F 01/02
H03K 03/3565
H03F 01/02
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