4. Amplifiers
  5. Sum and difference amplifiers

Martin Gröpl

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Circuit arrangement for the analogue suppression of echoes

Telephonic communications – Echo cancellation or suppression
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Controllable current source for a phase locked loop

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
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Power-efficient amplifier circuit and process for...

Amplifiers – Sum and difference amplifiers
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Scaled impedance replica for echo attenuation in digital...

Telephonic communications – Line equalization or impedance matching
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Profile ID: LFUS-PAI-P-2608350

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