4. Amplifiers
  5. Signal feedback
  6. Variable impedance in feedback path varied by separate...

Jurgen Lubbe

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Apparatus for continuously switching a demodulator from stereo o

Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Patent

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Audio signal processor

Electrical audio signal processing systems and devices – Including frequency control – Automatic tone control
Patent

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Device for varying the cutoff frequency of a low-pass filter

Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Patent

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Electric circuit comprising at least one switched capacitor...

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Clock or pulse waveform generating
Reexamination Certificate

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Filter circuit and audio signal processor provided therewith

Electrical audio signal processing systems and devices – Including frequency control – Automatic tone control
Patent

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Profile ID: LFUS-PAI-P-184098

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