4. Amplifiers
  5. With semiconductor amplifying device
  6. Including differential amplifier

Lionel Federspiel

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Analog audio filter for high frequencies

Electrical audio signal processing systems and devices – Including frequency control – Having crossover filter
Reexamination Certificate

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Differential active filter of the second order

Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent

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Profile ID: LFUS-PAI-P-383652

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